ARCHITECTURE AND URBAN DEVELOPMENT. RESTRUCTURING AND RESTORATION

Experience of restoration and reconstruction of architectural monuments: from engineering researches to projects implementation by scientists and students of MGSU

Vestnik MGSU 7/2014
  • Chernyshev Sergey Nikolaevich - Moscow State University of Civil Engineering (National Research University) (MGSU) Doctor of Geologo-Mineralogical Sciences, Professor, Department of Engineering Geology and Geoecology, Moscow State University of Civil Engineering (National Research University) (MGSU), 26 Yaroslavskoe shosse, Moscow, 129337, Russian Federation; This e-mail address is being protected from spambots. You need JavaScript enabled to view it .

Pages 18-27

For more than 20 years the author with his colleagues conducts engineering researches, design of restoration and reconstruction of various architectural monuments. Full cycles of works from engineering investigations to implementation of the own projects are executed on three objects: 1) architectural monument of the 19th century, the church in the museum preserve Abramtsevo (Moscow region), during 2005-2006; 2) a monument of Orthodox church history, a unique soil construction which is called "The Holy Ditch" in the village Diveevo (Nizhny Novgorod region) since 1997 to the present; 3) Church of Our Lady of Kazan also in Diveevo village during 1997-2002. For churches engineering researches are executed, calculations of the bases are made, ways of strengthening the bases are chosen, architectural projects of restoration are created. The church is restored by students under supervision of the experts from the university. The church in Diveevo was partially destroyed during the Soviet period. During restoration high-rise parts of the church were constructed. The works were performed by working restorers under control of the author of article in 2002-2004. Participation of students, masters, graduate students in restoration works had great educational value, gave to young people experience and knowledge. Students studied under professional restorers. Generalization is given in summary. D.S. Likhachyov's theory and our own experience are used. The principle of reconstructing barbarously destroyed engineering constructions, buildings and architectural complexes is formulated. It corresponds to the realities of the 21st century, new technological capabilities and requirements of modern society. Briefly: the reconstructed structure, in our opinion, has to face not only the past, but also the future. It is not always necessary to create the exact copy of the lost construction. Recreating the destroyed construction, it is necessary to apply new materials to increase the reliability and eliminate constructive imperfection of ancient constructions together with preserving old forms. Buildings and constructions have to be under construction anew mainly for performance of former functions, but the buildings have to meet modern requirements on the equipment and internal planning, modern technical norms. The project of the lost building needs to be made taking into account the change of environment. These provisions were successfully incarnated in the process of construction of St. Ditch in Diveev and they are also illustrated on the examples of the reconstruction of the Cathedral of Christ the Savior in Moscow and Frauenkiche in Dresden.

DOI: 10.22227/1997-0935.2014.7.18-27

References
  1. Paushkin G.A., Cherkasova L.I., Kryzhanovskiy A.L., Alekseev G.V. Problemy nadezhnosti osnovaniy i fundamentov khramovykh zdaniy na ostrove Anzer [Problems of Reliability of Bases and Foundations of Temple Buildings on the Island Anzer]. Problemy obespecheniya ekologicheskoy bezopasnosti stroitel'stva: 4 Denisovskie chteniya, sbornik [Proceedings of the 4th Denisov Readings: Problems of Ensuring Ecological Safety of Construction]. Moscow, MGSU Publ., 2008, pp. 126—134.
  2. Arts and Crafts. Von Morris bis Mackintosh — Reformbewegung zwischen Kunstgewerbe und Sozialutopie. Darmstadt, 1995, 152 S.
  3. Kunstlerkolonien in Europa im Zeichnen der Ebene und des Himmels. Ausstellungskatalog des Germanischen Nationalmuseums. Nurenberg, 2002, 124 S.
  4. Chernyshev S.N., Shcherbina E.V. Svyataya Bogorodichnaya Kanavka: prirodnye usloviya i tekhnicheskie resheniya po vossozdaniyu [St. Ditch: Environmental and Technical Solutions for Reconstruction]. Prirodnye usloviya stroitel'stva i sokhraneniya khramov Pravoslavnoy Rusi: sbornik trudov 2-go Mezhdunarodnogo nauchno-prakticheskogo simpoziuma [Proceeding of the 2-nd International Scientific and Practical Symposium "Environmental Conditions of Construction and Preservation of the Temples of Orthodox Russia]. Sergiev Posad, the Moscow Patriarchate Publ., 2005, pp. 247—253.
  5. Tserkov' Kazanskoy ikony Bozhiey Materi v Diveeve [Church of Our Lady of Kazan in Diveevo]. Moscow, Yabloko Publ., 2004, pp. 99—106.
  6. Kornilov A.M., Cherkasova L.I., Chernyshev S.N. Prognoz osadok fundamentov pravoslavnykh khramov pri ikh restavratsii s uchetom istorii nagruzheniya osnovaniya i osobennostey konstruktsii fundamentov na primere tserkvi Kazanskoy ikony Bozhiey Materi Sv.-Troitskogo Serafimo-Diveevskogo monastyrya [Forecast of Foundation Settlement of Orthodox Temples at their Restoration Taking into Account the History of the Basis Loading and Features of the Bases Design on the Example of Church of Our Lady of Kazan of St. Troitsky Serafimo-Diveevsky monastery]. Akademicheskie chteniya N.A.Tsytovicha: 2-e Denisovskie chteniya [Proceeding of the N.A.Tsytovich's academic readings: 2-nd Denisov readings]. Moscow, MGSU Publ., 2003, pp. 80—84.
  7. Darchiya V.I., Pashkevich S.A., Pulyaev I.S., Pustovgar A.P., Chernyshev S.N. Vliyanie usloviy osveshchennosti otkosov na ekspluatatsionnye svoystva geosinteticheskikh setok na osnove poliamida-6 / [Influence of Ambient Light on Slopes on the Performance Properties of Geosynthetic Grids Based on Polyamide-6]. Vestnik MGSU [Proceedings of Moscow State University of Civil Engineering]. 2013, no. 12, pp. 101—108.
  8. Chernyshev S.N., Timofeev V.Yu. Merzlotnye i gibridnye inzhenerno-geologicheskie protsessy v glinistykh gruntakh sooruzheniy Svyatoy Bogorodichnoy kanavki [Frost and Hybrid Engineering Geological Processes in Clay Soil of the Constructions of the St. Ditch]. Inzhenernaya geologiya [Engineering Geology]. 2012, no. 6, pp. 68—72.
  9. Tazina N.G., Darchiya V.I. Sozdanie gazonnykh travostoev na ochen' krutykh sklonakh sil'noy zatenennosti v Diveeve [Creation the Lawn Herbages on Very Cool Slopes of Strong Opacity in Diveevo]. Resursosberegayushchie tekhnologii v lugovom kormoproizvodstve: Materialy Mezhdunarodnoy nauchno-prakticheskoy konferentsii, posvyashchennoy 100-letiyu kafedry lugovodstva. Sbornik [Resource-saving Technologies in a Meadow Forage Production. St. Materials of the International Scientific and Practical Conference Devoted to the 100 Anniversary of the Chair of Grassland Culture]. SPbGAU Publ., 2013, pp. 240—245.
  10. Batsukh N., Chernyshtv S.N., Surmaagav M., Tkachev V.N. Influence of Engineering-Geological Conditions in the Mongolian Architecture. The Engineering Geology of Ancient Works, Monuments and Historical Sites, Proceedings of International Symposium. IAEG, Athens, 1988, pp. 223—228.
  11. Likhachev D.S. Ekologiya kul'tury [Ecology of the Culture]. Moscow, 1979, no. 7, pp. 173—179.
  12. Chernyshev S.N. Ekologiya kul'tury — chast' ucheniya o noosfere, ideynoe osnovanie vossozdaniya zdaniy i sooruzheniy [Culture in Ecology — a Part of the Noosphere, the Ideological Base in Reconstruction]. Vestnik MGSU [Proceedings of Moscow State University of Civil Engineering]. 2013, no. 12, pp. 123—130.
  13. Volker Stoll, Carsten Leibenart. Geotechnische und Hydrogeologische Arbeiten fur den Wiederaufbau der Frauenkirche Dresden und deren Umfeld. Prirodnye usloviya stroitel'stva i sokhraneniya khramov pravoslavnoy Rusi: sbornik tezisov 5-go Mezhdunarodnogo nauchno-prakticheskogo simpoziuma [Proceeding of the 5th International Scientific and Practical Symposium "Environmental Conditions of Construction and Preservation of the Temples of Orthodox Russia]. N. Novgorod, 2013, pp. 41—49.

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DRY MORTARS FOR CONSTRUCTION OF PROTECTIVE STRUCTURES AGAINST NEUTRONS WITH ENERGY OF 14.8 MeV

Vestnik MGSU 9/2017 Volume 12
  • Pustovgar Andrey Petrovich - Moscow State University of Civil Engineering (National Research University) (MGSU) candidate of technical sciences, assistant professor, Vice Rector for Research, scientific director of the Research Institute of Building Materials and Technologies (SRI SMiT), Moscow State University of Civil Engineering (National Research University) (MGSU), 26 Yaroslavskoe shosse, Moscow, 129337, Russian Federation.

Pages 947-953

Subject: concrete for construction of protective structures from neutrons with energy of 14.8 MeV. When constructing protective structures from ionizing radiation in the buildings of nuclear facilities, special attention is given to the work quality and conformity assessment of the built structures to the project documentation requirements. Research objectives: the objective is to obtain the necessary data for verification of software programs for neutron-physical analysis of protective characteristics of concretes with different chemical composition. Materials and methods: in order to achieve the objectives, computational and experimental studies were carried out using a 14.8 MeV neutron generator, a spectrometric and dosimetric equipment complex, and the ANISN computational software package. Studies were carried out for two compositions of concrete. Results: the results of the performed studies showed satisfactory agreement between the computational and experimental data. Conclusions: the obtained results of computational and experimental studies will allow us to develop simple semi-empirical calculation methods that can be used in designing concrete compositions with the required protective efficiency from neutrons with energy of 14.8 MeV and in controlling the stability of chemical composition of dry concrete mixtures during their production and usage.

DOI: 10.22227/1997-0935.2017.9.947-953

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Features of the effect of dynamic loading produced on the concrete behavior at different stages of deformation caused by uniaxialand biaxial compression

Vestnik MGSU 7/2013
  • Tsvetkov Konstantin Aleksandrovich - Moscow State University of Civil Engineering (MGSU) Candidate of Technical Sciences, Associate Professor, Department of Strength of Materials; +7 (499) 183-43-29, Moscow State University of Civil Engineering (MGSU), 26 Yaroslavskoe shosse, Moscow, 129337, Russian Federation; This e-mail address is being protected from spambots. You need JavaScript enabled to view it .
  • Mitrokhina Anastasiya Olegovna - Moscow State University of Civil Engineering (MGSU) postgraduate student, Department of Strength of Materials; +7 (499) 183-43-29, Moscow State University of Civil Engineering (MGSU), 26 Yaroslavskoe shosse, Moscow, 129337, Russian Federation; This e-mail address is being protected from spambots. You need JavaScript enabled to view it .

Pages 77-85

The authors examine the impact of dynamic loads produced on the strength and deformability properties of concretes and their micro-cracking. The experiment performed and analyzed by the authors consisted in the dynamic loading of a concrete sample that caused its destruction. The analysis of the experimental findings consisted in the identification of specific conditions of cracking, derivation of dependencies and compilation of charts. The following conclusions are made in furtherance of the authors’ analysis of the experiment in question:1) experimental findings help identify the nature of influence of the stress state on the strength value, deformability and micro-cracking of concretes. For example, it is discovered in the process of the experiments that the lower bound of the microracking dynamics increases more significantly than the prism strength.2) Regularities of influence of the rise in the loading intensity produced on concrete deformation properties are identified. The key factor of the concrete destruction is not the nature of the deformation, but the value of the overall strain.

DOI: 10.22227/1997-0935.2013.7.77-85

References
  1. Karpenko N.I. Obshchie modeli mekhaniki zhelezobetona [General Models of Reinforced Concrete Mechanics]. Moscow, Stroyizdat Publ., 1996.
  2. Tsvetkov K.A. Osnovnye rezul’taty eksperimental’no-teoreticheskikh issledovaniy prochnostnykh i deformativnykh svoystv betona pri dinamicheskom nagruzhenii v usloviyakh odnoosnogo i dvukhosnogo szhatiya [Principal Findings of Theoretical and Experimental Research into Strength and Deformability-related Properties of Concrete Exposed to Dynamic Loading in the Conditions of Uniaxial and Biaxial Compression]. Vestnik MGSU [Proceedings of Moscow State University of Civil Engineering]. 2007, no. 3, pp. 109—120.
  3. Malashkin Yu.N., Ish V.G. Beton v dvukhosnom napryazhennom sostoyanii «rastyazhenie-szhatie» [Concrete in the Biaxial Stress State of “Tension-Compression”. In the book: Issledovanie monolitnosti i raboty betona massivnykh sooruzheniy [Research into Integrity and Behaviour of the Concrete of Massive Concrete Structures]. Moscow, MISI Publ., 1975, pp. 120—130.
  4. Bakirov R.O., Emyshev M.V., Maystrenko V.N. Vliyanie skorosti nagruzheniya na granitsy mikrotreshchinoobrazovaniya vysokoprochnykh betonov [Influence of Loading Rate onto Micro-cracking Bounds of High-strength Concretes]. Beton i zhelezobeton [Concrete and Reinforced Concrete]. 1982, no. 9, pp. 32—33.
  5. Rakhmanov V.A., Rozovskiy E.L. Vliyanie dinamicheskogo vozdeystviya na prochnostnye i deformativnye svoystva tyazhelogo betona [Influence of Dynamic Impacts on Strength and Deformability Properties of Heavy Concretes]. Beton i zhelezobeton [Concrete and Reinforced Concrete]. 1987, no. 7, pp. 19—20.
  6. Bazhenov Yu.M. Beton pri dinamicheskom nagruzhenii [Concrete Exposed to Dynamic Loading]. Moscow, Stroyizdat Publ.,1971, 271 p.
  7. Rykov G.V., Obledov V.P., Mayorov E.Yu., Abramkina V.T. Eksperimental’nye issledovaniya protsessov deformirovaniya i razrusheniya betonov pri intensivnykh dinamicheskikh nagruzkakh [Experimental Research into Processes of Deformation and Destruction of Concretes Exposed to Intensive Dynamic Loads]. Stroitel’naya mekhanika i raschet sooruzheniy [Structural Mechanics and Analysis of Structures]. 1989, no. 5, pp. 54—59.
  8. Ross C.A., Tedesco J.W., Kuennen S.T. Effects of Strain Rate on Concrete Strength. Materials Journal, January 1, 1995, pp. 37—47.
  9. Zielinski A.J. Concrete Structures under Impact Loading. Rate effects. Internal Report. Delft University of Technology, Faculty Civil Engineering and Geosciences, 1984, pp. 12—31.

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THE STRENGTH OF REINFORCED CONCRETE BEAM ELEMENTS UNDER CYCLIC ALTERNATING LOADING AND LOW CYCLE LOAD OF CONSTANT SIGN

Vestnik MGSU 9/2015
  • Semina Yuliya Anatol'evna - Odessa State Academy of Civil Engineering and Architecture (OGASA) postgraduate student, Department of Strength of Materials, Odessa State Academy of Civil Engineering and Architecture (OGASA), 4 Didrikhsona Str., Odessa, 65045, Ukraine; This e-mail address is being protected from spambots. You need JavaScript enabled to view it .

Pages 36-50

The behavior of reinforced concrete elements under some types of cyclic loads is described in the paper. The main aim of the investigations is research of the stress-strain state and strength of the inclined sections of reinforced concrete beam elements in conditions of systemic impact of constructive factors and the factor of external influence. To spotlight the problem of cyclic loadings three series of tests were conducted by the author. Firstly, the analysis of the tests showed that especially cyclic alternating loading reduces the bearing capacity of reinforced concrete beams and their crack resistance by 20 % due to the fatigue of concrete and reinforcement. Thus the change of load sign creates serious changes of stress-strain state of reinforced concrete beam elements. Low cycle loads of constant sign effect the behavior of the constructions not so adversely. Secondly, based on the experimental data mathematical models of elements’ strength were obtained. These models allow evaluating the impact of each factor on the output parameter not only separately, but also in interaction with each other. Furthermore, the material spotlighted by the author describes stress-strain state of the investigated elements, cracking mechanism, changes of deflection values, the influence of mode cyclic loading during the tests. Since the data on the subject are useful and important to building practice, the ultimate aim of the tests will be working out for improvement of nonlinear calculation models of span reinforced concrete constructions taking into account the impact of these loads, and also there will be the development of engineering calculation techniques of their strength, crack resistance and deformability.

DOI: 10.22227/1997-0935.2015.9.36-50

References
  1. Babich E.M. Vliyanie dlitel'nykh i malotsiklovykh nagruzok na mekhanicheskie svoystva betonov i rabotu zhelezobetonnykh elementov [Influence of Long-Term and Low-Cycle Loads on the Mechanical Properties of Concrete and on the Work of Reinforced Concrete Elements]. Rovno, 1995, 386 p. (In Ukrainian)
  2. Albu E.I., Kitsak A.K., Semina Yu.A., Gaydarzhi A.P., Grebenyuk A.V., Sashin V.O., Karpyuk V.M. Metodika eksperimental'nykh issledovaniy napryazhenno-deformirovannogo sostoyaniya priopornykh uchastkov zhelezobetonnykh balok pri malotsiklovom nagruzhenii [Technique of Experimental Studies of Stress-Strain State of Reinforced Concrete Beams under Low-Cycle Loading in the Supporting Areas]. Stroitel'stvo — kak faktor formirovaniya komfortnoy sredy zhiznedeyatel'nosti: sbornik materialov V Respublikanskoy nauchno-tekhnicheskoy konferentsii (28 noyabrya 2013 g.) [Construction as a Factor of Comfortable Living Environment Formation: Collection of the Materials of the 5th Republican Scientific and Technical Conference]. Bendery, 2014. Рр. 3—10. (In Russian)
  3. Zalesov A.S., Klimov Yu.A. Prochnost' zhelezobetonnykh konstruktsiy pri deystvii poperechnykh sil [The Strength of Reinforced Concrete Structures under the Action of Shear Forces]. Kiev, Budіvel'nik Publ., 1989, 104 p. (In Russian)
  4. Korneychuk A.I., Masyuk G.Kh. Eksperimental'nye issledovaniya nesushchey sposobnosti naklonnykh secheniy izgibaemykh zhelezobetonnykh elementov pri deystvii malotsiklovykh znakoperemennykh nagruzok [Experimental Study of the Bearing Capacity of Inclined Cross Sections of Bending Reinforced Concrete Elements under the Action of Low-Cycle Alternating Loads]. Resursoekonomnye materialy, konstruktsii zdaniya i sooruzheniya : sbornik nauchnykh trudov [Resource Saving Materials, Buildings Constructions and Structures: Collection of Scientific Papers]. Rovno, 2008, no. 16, part 2, pp. 217—222. (In Ukrainian)
  5. Dorofeev V.S., Karpyuk V.M., Yaroshevich N.M. Prochnost' i treshchinostoykost' izgibaemykh zhelezobetonnykh elementov [Strength and Crack Resistance of Bending Reinforced Concrete Elements]. Vestnik OGASA [Bulletin of the Odessa State Academy of Building and Architecture]. 2008, no. 28, pp. 149—158. (In Russian)
  6. Karpyuk V.M. Raschetnye modeli silovogo soprotivleniya progonnykh zhelezobetonnykh konstruktsiy v obshchem sluchae napryazhennogo sostoyaniya [Calculation Models of Power Resistance of Girder Reinforced Concrete Constructions in General Case of Stress State]. Odessa, OGASA Publ., 2014, 352 p. (In Ukrainian)
  7. Gomon P.S. Rabota zhelezobetonnykh balok tavrovogo secheniya pri deystvii povtornogo nagruzheniya [Work of T-section Reinforced Concrete Beams under Repeated Loading]. Novye materialy, oborudovanie i tekhnologii v promyshlennosti : materialy Mezhdunarodnoy konferentsii molodykh uchenykh [New Materials, Equipment and Technologies in the Industry: Proceedings of the International Conference of Young Scientists]. Mogilev, 2009, p. 90. (In Ukrainian)
  8. Zarechanskiy O.O. Issledovanie szhato-izognutykh elementov pri povtornom deystvii poperechnoy sily vysokikh urovney [Research of Compressed-Bent Elements by Repeated Transverse Force of High Levels]. Resursoekonomnye materialy, konstruktsii zdaniya i sooruzheniya : sbornik nauchnykh trudov [Resource Saving Materials, Buildings Constructions and Structures: Collection of Scientific Papers]. Rovno, 2005, no. 13, pp. 129—135. (In Ukrainian)
  9. Zinchuk N.S. Eksperimental'nye issledovaniya napryazhenno-deformirovannogo sostoyaniya zhelezobetonnykh izgibaemykh elementov pri odnokratnom i malotsiklovom nagruzheniyakh v usloviyakh povyshennykh temperatur [Experimental Study of Stress-Strain State of Reinforced Concrete Bent Elements under the Single and Low-Cycle Loading at Elevated Temperatures]. Resursoekonomnye materialy, konstruktsii zdaniya i sooruzheniya : sbornik nauchnykh trudov [Resource Saving Materials, Buildings Constructions and Structures: Collection of Scientific Papers]. Rovno, 2004, no. 11, pp. 164—166. (In Ukrainian)
  10. Karavan V.V., Masyuk G.Kh. Rezul'taty eksperimental'nykh issledovaniy treshchinostoykosti i deformativnosti izgibaemykh zhelezobetonnykh elementov pri vozdeystvii malotsiklovykh znakoperemennykh nagruzok [The Experimental Results of Crack Resistance and Deformability Bending Reinforced Concrete Elements When Exposed to Low-Cycle Alternating Loads]. Stalezhelezobetonnye konstruktsii. Issledovanie, proektirovanie, stroitel'stvo, ekspluatatsiya : sbornik nauchnykh statey [Composite Structures. Research, Design, Construction, Operation: Collection of Scientific Papers]. Krivoy Rog, 2002, no. 5, pp. 168—172. (In Ukrainian)
  11. Grigorchuk A.B., Masyuk G.Kh. Prochnost' i deformativnost' zhelezobetonnykh elementov, kotorye podvergayutsya vozdeystviyu znakoperemennogo nagruzheniya [Strength and Deformability of Reinforced Concrete Elements That are Exposed to Action of Alternating Loading]. Sbornik materialov konferentsii Ch. 1. Stroitel'stvo [Collection of Conference Materials. Part 1 Building]. L'vov, 2001, pp. 29—34. (In Ukrainian)
  12. Karpenko N.I., Karpenko S.N. O postroenii bolee sovershennoy modeli deformirovaniya zhelezobetona s treshchinami pri ploskom napryazhennom sostoyanii [On Construction of a More Perfect Model of Deformation of Cracked Reinforced Concrete under Plane Stress State]. Beton i zhelezobeton — puti razvitiya : materialy ІІ Vserossiyskoy Mezhdunarodnoy konferentsii po betonu i zhelezobetonu (05.09—09.09.2002) [Concrete and Reinforced Concrete — Ways of Development: Materials of the 2nd All-Russian International Conference on Concrete and Reinforced Concrete]. Moscow, 2005, pp. 431—444. (In Russian)
  13. Zalesov A.S., Mukhamediev T.A., Chistyakov E.A. Raschet prochnosti zhelezobetonnykh konstruktsiy pri razlichnykh silovykh vozdeystviyakh po novym normativnym dokumentam [Calculation of the Strength of Concrete Structures under Different Force Actions on New Regulations]. Beton i zhelezobeton [Concrete and Reinforced Concrete]. 2002, no. 3, pp. 10—13. (In Russian)
  14. Babich E.M., Gomon P.S., Filipchuk S.V. Rabota i raschet nesushchey sposobnosti izgibaemykh zhelezobetonnykh elementov tavrovogo profilya pri vozdeystvii povtornykh nagruzok [Work and Calculation of the Bearing Capacity of Bending T-Sections Reinforced Concrete Elements under the Influence of Repeated Loads]. Rovno, NUVGP Publ., 2012, 108 p. (In Ukrainian)
  15. Masyuk G.Kh., Korneychuk A.I. Napryazhenno-deformirovannoe sostoyanie naklonnykh secheniy izgibaemykh zhelezobetonnykh elementov, kotorye podvergayutsya vozdeystviyu malotsiklovykh znakoperemennykh nagruzok [Stress-strain State of Incline Sections of Bending Concrete Elements That are Exposed to the Action of Low-Cycle Alternating Loads]. Resursoekonomnye materialy, konstruktsii zdaniya i sooruzheniya : sbornik nauchnykh trudov [Resource Saving Materials, Buildings Constructions and Structures: Collection of Scientific Papers]. Rovno, NUVGP Publ., 2008, no. 17, pp. 204—211. (In Ukrainian)
  16. Mel'nik S.V., Borisyuk O.P., Kononchuk O.P., Petrishin V.M. Issledovanie raboty usilennykh zhelezobetonnykh balok pri deystvii malotsiklovykh nagruzheniy [Research of Reinforced Concrete Beams Work under the Action of Low-Cycle Loading]. Resursoekonomnye materialy, konstruktsii zdaniya i sooruzheniya : sbornik nauchnykh trudov [Resource Saving Materials, Buildings Constructions and Structures: Collection of Scientific Papers]. Rovno, 2008, no. 17, pp. 404—410. (In Ukrainian)
  17. Koval'chik Ya.I., Koval' P.M. Issledovanie treshchinostoykosti predvaritel'no napryazhennykh zhelezobetonnykh balok pri vozdeystvii malotsiklovykh nagruzheniy [Investigation of Crack Resistance of Prestressed Concrete Beams under the Influence of Low-Cycle Loading]. Nauchno-prikladnye aspekty avtomobil'noy i transportno-dorozhnoy otrasley : Nauchnye zametki [Scientific and Practical Aspects of the Automobile and Transport Industries: Scientific Notes]. Lutsk, 2014, no. 45, pp. 282—287. (In Ukrainian)
  18. Dovbenko V.S. Issledovanie raboty zhelezobetonnykh balok, usilennykh polimernoy kompozitsiey pri vozdeystvii malotsiklovykh nagruzok [Research of Reinforced Concrete Beams Work Reinforced with Polymer Composition When Exposed to Low-Cycle Loads]. Resursoekonomnye materialy, konstruktsii zdaniya i sooruzheniya : sbornik nauchnykh trudov [Resource Saving Materials, Buildings Constructions and Structures: Collection of Scientific Papers]. Rovno, 2011, no. 22, pp. 787—794. (In Ukrainian)
  19. Babich V.E. Osobennosti raboty nerazreznykh zhelezobetonnykh balok pri povtornykh nagruzkakh [Features of Continuous Reinforced Concrete Beams Work under the Repeated Loads]. Stroitel'nye konstruktsii : sbornik nauchnykh trudov [Building Structures: Collection of Scientific Works]. Kiev, 2003, no. 58, pp. 8—13. (In Ukrainian)
  20. Drobyshinets S.Ya., Babich E.M. Rabota stalefibrobetonnykh i stalefibrozhelezobetonnykh balok pri odnokratnom i povtornom nagruzheniyakh [Work of Fiber Concrete and Fiber Reinforced Concrete Beams under the Action of Single and Repeated Loadings]. Stalezhelezobetonnye konstruktsii. Issledovanie, proektirovanie, stroitel'stvo, ekspluatatsiya : sbornik nauchnykh statey [Composite Structures. Research, Design, Construction, Operation: Collection of Scientific Papers]. Krivoy Rog, 2004, no. 6, pp. 65—71. (In Ukrainian)
  21. Valovoy M.A. Prochnost', deformativnost' i treshchinostoykost' zhelezobetonnykh balok pri vozdeystvii povtornykh nagruzok [The Strength, Crack Resistance and Deformability of Concrete Beams under the Influence of Repeated Loads]. Stalezhelezobetonnye konstruktsii. Issledovanie, proektirovanie, stroitel'stvo, ekspluatatsiya : sbornik nauchnykh statey [Composite Structures. Research, Design, Construction, Operation: Collection of Scientific Papers]. Krivoy Rog, 2008, no. 8, pp. 45—48. (In Ukrainian)

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IDENTIFICATION OF MUTUAL INFLUENCE OF BENDING AND TORSIONAL STRAINS OF THE REINFORCED CONCRETE SPACE GRID FLOOR AS PART OF THE MONITORING OF ITS ERECTION

Vestnik MGSU 7/2012
  • Plotnikov Alexey Nikolaevich - Chuvash State University named after I.N. Ulyanov (ChuvSU) Associate Professor of Building Structures, +7 (8352) 62 45 96, Chuvash State University named after I.N. Ulyanov (ChuvSU), 15 Moskovskiy Prospekt, Cheboksary, 428015, Russian Federation; This e-mail address is being protected from spambots. You need JavaScript enabled to view it .

Pages 82 - 89

The author presents the results of measurements of total deformations of the space-grid floor in relation to the torsional strain of beams and the rigidity of beams in bending and torsion while monitoring the erection of the floor of a building.
Any space grid system is utterly sensitive to changes in relations between the rigidity of elements. No experimental data covering space grid floors or any method of analysis of their stress-strain state are available.
The author performed the assessment of interrelations between the rigidity of some beams in the two directions by means of a full-scale loading test (monitoring) of the monolithic space grid floor, beam size 8.0 × 9.2 m. The purpose of the assessment was to confirm the bearing capacity and the design patterns based on deflections and stresses of elements to select the operational reinforcement value. Monolithic concrete was used to perform the load test.
As a result, the width of concrete ribs was found uneven. In the design of reinforced concrete space rib floors it is advisable to develop detailed models of structures through the employment of the finite element method due to the significant sensitivity of the system to distribution and redistribution of stresses.
Large spans of monolithic space rib floors require the monitoring of the stress-strain state and computer simulations to adjust the design pattern on the basis of the monitoring results.

DOI: 10.22227/1997-0935.2012.7.82 - 89

References
  1. Cao M., Ren Q., Qiao P. Nondestructive Assessment of Reinforced Concrete Structures Based on Fractal Damage Characteristic Factor», Journal of Engineering Mechanics, vol. 132, no. 9, pp. 924—931.
  2. Plotnikov A.N. Raspredelenie i pereraspredelenie usiliy v opertykh po konturu zhelezobetonnykh setchato-rebristykh sostavnykh perekrytiyakh [Distribution and Redistribution of Forces in Reinforced Concrete Space Grid Layered Floors Supported on Four Sides]. Proceedings of the All-Russian Conference of Young Scientists «Building Structures — 2000». State University of Civil Engineering, 2000.
  3. Plotnikov A.N. Izmenenie napryazhenno-deformirovannogo sostoyaniya zhelezobetonnoy perekrestno-rebristoy sistemy v protsesse ee vklyucheniya v sostav sloistogo perekrytiya vysotoy 2,1 m [The Change of the Stress-strain State of the Reinforced Concrete Space Rib System in the Course of Its Incorporation into the Layered Floor, Height 2.1 m]. Industrial and Civil Engineering in the Modern World. Collections of research projects of the Institute of Construction and Architecture. Moscow State University of Civil Engineering, 2011.
  4. Plotnikov A.N. Modelirovanie metodom konechnykh elementov (MKE) zhelezobetona pri kruchenii s izgibom [Simulation of Reinforced Concrete in the event of Torsion with Bending by the Method of Finite Elements (FEM)]. International Journal for Computational Civil and Structural Engineering. Vol. 6, no. 1 and 2, 2010. Moscow State University of Civil Engineering, pp.177-178. Available at: URL:http://www.mgsu.ru/images/stories/ nash_universitet/ Vestnik/IJCCSE _v6_i12_2010.pdf/ Date of Access: 22.11.2011.
  5. Aivazov R.L., Plotnikov A.N. Modelirovanie napryazhennogo sostoyaniya perekrestnykh elementov s razlichnym sootnosheniem zhestkostey na izgib metodom konechnykh elementov [Simulation of the Stress State of Cross Elements with Different Ratios of Bending Rigidity by the Finite Element Method]. New in Architecture, and Reconstruction of Structures: Proceedings of the Sixth All-Russian Conference NASKR - 2005. Chuvash State University, Cheboksary, 2005.
  6. Plotnikov A.N., Ezhov A.V., Sabanov A.I. Obsledovanie zhelezobetonnykh perekrytiy, obrazovannykh perekrestnymi rebrami s tsel’yu otsenki ikh napryazhenno-deformirovannogo sostoyaniya [Examination of Reinforced Floors Formed by Cross Ribs in order to Assess Their Stress-Strain State]. Prevention of Accidents of Buildings and Structures — 2011. Moscow. 2011. Available at: http://pamag.ru/pressa/deformat-status/ Date of Access: 21/11/2011.
  7. Bailey C.G., Toh W.S., Chan B.M., Simplified and Advanced Analysis of Membrane Action of Concrete Slabs. ACI JOURNAL, vol. 105, no. 1, 2008, pp. 30—40.
  8. SP 52-101—2003. Betonnye i zhelezobetonnye konstruktsii bez predvaritel’nogo napryazheniya armatury [Building Rules 52-101—2003. Concrete and Reinforced Concrete Structures without Prestressing of Reinforcement]. Moscow, 2004.
  9. Tekhnicheskiy kodeks ustanovivsheysya praktiki [Technical Code of Practice]. EN 1992-1-1:2004 Eurocode 2: Design of concrete structures — Part 1-1: General rules and rules for buildings. Ministry of Architecture and Construction of Belarus. Minsk, 2010.
  10. JSCE Guideline for Concrete no. 15. Standard Specifications for Concrete Structures — 2007. JSCE Concrete Committee. Design Publ., Japan, 2010.
  11. Aivazov R.L., Plotnikov A.N. Zhestkost’ zhelezobetonnykh perekrestnykh sistem na kruchenie i vliyanie ee izmeneniya na obshchee NDS [Rigidity of Reinforced Concrete Cross-Systems in Torsion and Its Effect on the Overall Change in the Stress-Strain State]. New in Architecture, and Reconstruction of Structures. Proceedings of the Sixth All-Russian Conference NASKR - 2007. Chuvash State University, Cheboksary, 2009.
  12. Plotnikov A.N., Ezhov A.V., Sabanov A.I. Pereraspredelenie usiliy v perekrestno-rebristom zhelezobetonnom perekrytii pri ekspluatatsii [Redistribution of Forces within Reinforced Concrete Space Rib Floors in the Course of Operation]. Industrial and Civil Engineering in the Modern World. Collections of research projects of the Institute of Construction and Architecture. Moscow State University of Civil Engineering, 2011.

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Ensuring high quality and efficiency of the worksin the process of constructing the tunnels of in-situ concrete

Vestnik MGSU 1/2014
  • Ginzburg Aleksandr Vladimirovich - Scientific Production Association «Cosmos» (LLK «NPO «KOSMOS») Candidate of Technical Sciences, Vice-President for Regional Development, Scientific Production Association «Cosmos» (LLK «NPO «KOSMOS»), 38-25, Shosse Entuziastov, Moscow, 111123, Russian Federation; This e-mail address is being protected from spambots. You need JavaScript enabled to view it .

Pages 98-110

In the article the author describes the importance of the technological regulations development in the process of constructing various transport constructions: tunnels, subways, bridges and other important objects. In the article the peculiarities of the tech- nological regulations development are fully taken into account; the dependence of the depth of their development and the quality of the concrete constructions, as well as the speed of the objects of transport infrastructure construction, including the examples of building the road tunnels in Moscow. The course of their development is shown with account for the main provisions, which should be included in technological regulations in order to ensure the most complete coverage of the issues arising in engineering, laboratory and Supervisory structure in the process of performing the works. The author proposes new effective materials and technologies of works. In particular, sufficient attention is paid to self-compacting concrete — a new type of concrete, which is able to flow and compact under its own weight, completely filling the formwork even in case of dense reinforcement, while maintaining the homogeneity and having no seals. The application experience of concrete self-sealing in the construction of the metro showed that labor costs for the concrete mixture sealing were 5-6 times reduced, and the speed of laying the concrete increased 2-3 times. When laying self-compacting concrete high-quality surfaces are formed, which do not require additional costs to bring them to the design parameters. In addition, the work shows the parameters of the technological processes and sets various types of works sequence: the article describes the features of formwork, placement and curing of the concrete in terms of year-round construction, shows the importance of thermo physical calculations of concrete hardening and the efficiency of using self-sealing concrete. Sufficient attention is also paid to the methods of quality assurance and to the methods of preventing cracking of various structural elements of a construction, as well as to the safety requirements and ensuring proper protection of the environment.

DOI: 10.22227/1997-0935.2014.1.98-110

References
  1. Solov'yanchik A.R., Pulyaev I.S. Osobennosti vozvedeniya v zimnikh usloviyakh zhelezobetonnykh konstruktivnykh elementov zdaniya akademii dzyudo v g. Zvenigorod Moskovskoy oblasti [Features of Constructing the Reinforced Concrete Elements of the Building of Judo Academy in Zvenigorod City of Moscow Region in Winter Conditions]. Beton i zhelezobeton. Oborudovanie, materialy, tekhnologii [Concrete and Reinforced Concrete. Equipment, Materials, Technologies]. 2011, no. 2(5), pp. 76—80.
  2. Shifrin S.A., Tkachev A.V. Teplovoe vzaimodeystvie tverdeyushchego betona i betonnogo osnovaniya v usloviyakh solnechnoy radiatsii [Thermal Interaction of Hardening Concrete and Concrete Base in the Conditions of Sun Radiation]. Sbornik trudov VNIIPITeploproekt [Collection of Works of Teploproekt]. Moscow, VNIIPITeploproekt Publ., 1985, pp. 19—27.
  3. Solov'yanchik A.R., Korotin V.N., Pulyaev I.S., Tret'yakova N.S. Opyt primeneniya samouplotnyayushchikhsy betonnykh smesey pri sooruzhenii mostov i tonneley [The Experience of Applying Self-compacting Concrete Mixtures in the Process of Constructing Bridges and Tonnels]. Alitinform. Mezhdunarodnoe analiticheskoe obozrenie. Tsement. Beton. Sukhie smesi [Alitinform. International Analytical Review. Cement. Concrete. Dry Mixtures]. 2012, no. 3 (25), pp. 8—18.
  4. Smirnov N.V., Antonov E.A. Rol' polzuchesti betona v formirovanii termonapryazhennogo sostoyaniya monolitnykh zhelezobetonnykh konstruktsiy v protsesse ee vozvedeniya [The Role of Concrete Creep in the Process of Forming the Thermal Strain State of Monolithic Reinforced Concrete Structures during the Building Process]. Sbornik trudov TsNIIS [Collection of Works of Scientific and Research Institute of Transport Construction]. Moscow, TsNIIS Publ., 2005, no. 233, pp. 89—117.
  5. Solov'yanchik A.R., Sychev A.P., Shifrin S.A. O vliyanii rasstoyaniya mezhdu postoyannymi temperaturno-deformatsionnymi shvami na treshchinoobrazovanie v konstruktivnykh elementakh Gagarinskogo tonnelya [On the Influence of the Distance Between Constant Expansion Joints on Crack Formation in Constructive Elements of Gagarinskiy Tunnel]. Dolgovechnost' stroitel'nykh konstruktsiy. Teoriya i praktika zashchity ot korrozii: materialy Mezhdunarodnoy konferentsii 7—9 oktyabrya 2002 goda [Durability of Building Structures. Theory and Practice of Corrosion Proofing. Materials of the International Conference, October 7—9, 2002]. Moscow, Tsentr ekonomiki i marketinga Publ., 2002, pp. 11—17.
  6. Schoeppel K., Plannerer M., Springenschmid R. Determination of Restraint Stresses and of Material Properties during Hydration of Concrete with the Temperature-stress Testing Machine. International RILEM Symposium. Munich, 1994, p. 153.
  7. Solovyanchik A.R., Krylov B.A., Malinsky E.N. Inherent Thermal Stress Distributions in Concrete Structures and Method for their Control. Thermal Cracking in Concrete at Early Ages. Proceedings of the International RILEM Symposium. Munich, 1994, no. 25, pp. 369—376.
  8. Solov'yanchik A.R., Shifrin S.A. Upravlenie termonapryazhennym sostoyaniem monolitnykh zhelezobetonnykh konstruktsiy pri skorostnom kruglogodichnom stroitel'stve transportnykh sooruzheniy [Control of Thermal Strain State of Monolithic Reinforced Concrete Structures in the Process of High Speed Year-round Construction of Transport Structures]. Sbornik trudov TsNIIS [Collection of Works of the Scientific and Research Institute of Transport Construction]. Moscow, TsNIIS Publ., 2000, no. 203, pp. 158—164.
  9. Thielen G., Hintzen W. Investigation of Concrete Behavior under Restraint with a Temperature-stress Test Machine. International RILEM Symposium. Munich, 1994, no. 25, pp. 142—152.
  10. Shifrin S.A. Uchet neritmichnosti tekhnologicheskikh protsessov pri vybore i obosnovanii rezhimov betonirovaniya raznomassivnykh konstruktsiy transportnykh sooruzheniy [Account for Irregularity of Technological Processes in the Process of Choosing and Reasoning the Modes of Concrete Pouring of the Structures of Transport Constructions with Different Masses]. Sbornik trudov TsNIIS [Collection of Works of Scientific and Research Institute of Transport Construction]. Moscow, TsNIIS Publ, 2003, no. 217, pp. 206—216.

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SMALL SIZE MACHINES FOR TRANSPORTATION OF CONCRETE MIXES AND SHOTCRETE OPERATIONS

Vestnik MGSU 5/2013
  • Emel’yanova Inga Anatol’evna - Kharkiv National University of Civil Engineering and Architecture (KhNUSA) Doctor of Technical Sciences, Professor, Department of Mechanization of Construction Processes; +38 (067) 571-56-84; 8 (050) 325-26-84, Kharkiv National University of Civil Engineering and Architecture (KhNUSA), 40 Sums’ka St., Kahrkiv, 61002, Ukraine; This e-mail address is being protected from spambots. You need JavaScript enabled to view it .
  • Anishchenko Anna Igorevna - Kharkiv National University of Civil Engineering and Architecture (KhNUSA) assistant lecturer, Department of Mechanization of Construction Processes; +38 (067) 571-56-84; +38 (050) 325-26-84, Kharkiv National University of Civil Engineering and Architecture (KhNUSA), 40 Sums’ka St., Kahrkiv, 61002, Ukraine; This e-mail address is being protected from spambots. You need JavaScript enabled to view it .
  • Melentsov Nikolay Alekseevich - OOO «Stal’konstruktsiya» Chief Engineer; +38 (067) 571-56-84; +38 (050) 325-26-84, OOO «Stal’konstruktsiya», 283 Moskovskiy pr., 61106, Kahrkiv, 61002, Ukraine.
  • Gordienko Anatoliy Timofeevich - Kharkiv National University of Civil Engineering and Architecture (KhNUSA) Candidate of Technical Sciences, Professor, Department of Mechanization of Construction Processes; +38 (067) 571-56-84; +38 (050) 325-26-84., Kharkiv National University of Civil Engineering and Architecture (KhNUSA), 40 Sums’ka St., Kahrkiv, 61002, Ukraine; This e-mail address is being protected from spambots. You need JavaScript enabled to view it .

Pages 87-96

The article represents a summary of findings of various research projects aimed at the optimization of specific items of small size machines developed and pilot tested at different stages of construction operations.For 15 years, Department of Mechanization of Construction Processes, Kharkiv National University of Civil Engineering and Architecture has been engaged in design, pilot testing and monitoring of practical application of small size construction machinery. All machines and items of equipment have adsorbed numerous research findings, and no similar products are available in Ukraine and worldwide.The authors analyze different items of construction machines that have already been tested in the course of construction operations. They include a twin-piston coun- terflow mortar-and-concrete pump, two-piston direct-flow mortar-and-concrete pumps equipped with ball valves, spring valves and disk valves, advanced cascade concrete mixing machines. Each of the above machines can operate in pursuance of a pre-set pattern of shotcrete operations.All machines are universal, as twin-piston concrete pumps may pump concrete mixes having different workability rates; they can also be used to transport building mixes in horizontal and vertical directions; they are applied for shotcrete operations. They are efficiently used in the preparation of different mixes.All machines and items of equipment are protected by Ukraine-wide patents. They are recommended for wide-scale use due to sophisticated structural solutions invested into their design.

DOI: 10.22227/1997-0935.2013.5.87-96

References
  1. Emel’yanova I.A., Zadorozhnyy A.A., Guzenko S.A., Melentsov N.A. Dvukhporshnevye rasstvorobetononasosy dlya usloviy stroitel’noy ploshchadki [Twin-piston Concrete Pumps for Construction Sites]. Kharkiv, Timchenko Publ., 2011, 196 p.
  2. Emel’yanova I.A., Zadorozhnyy A.A., Guzenko S.A. K voprosu opredeleniya effektivnosti ispol’zovaniya malogabaritnogo oborudovaniya dlya raboty na krupnonozernistykh betonnykh smesyakh [Identification of Efficiency of Small Size Machines in Case of Coarsegrained Concrete Mixes]. Naukoviy v³snik bud³vnitstva [Scientific Proceedings of Construction]. Khark³v, 2009, no. 51, pp. 205—212.
  3. Emel’yanova I.A., Zadorozhnyy A.A., Neporozhnev A.S., Guzenko S.A. Osobennosti transportirovaniya krupnozernistykh betonnykh smesey s ispol’zovaniem malogabaritnogo oborudovaniya [Transportation of Coarse-grained Concrete Mixes Using Small Size Machines]. Interstroymekh — 2008. Tr. Mezhdunar. nauch.-tekhn. konf. [Proceedings of International Scientific and Technical Conference Interstroymekh — 2008]. Vladimir, VGU Publ., 2008, pp. 200—206.
  4. Emel’yanova I.A., Baranov A.N., Zadorozhnyy A.A., Protsenko A.N., Regli U.K. Ispol’zovanie oborudovaniya «mokrogo» torkretorovaniya v usloviyakh rekonstruktsii zdaniy i sooruzheniy [Using Machines for “Wet” Shotcreting in Reconstruction of Buildings and Structures]. Naukoviy v³snik bud³vnitstva [Scientific Proceedings of Construction]. Khark³v, 1998, no. 2, pp. 26—29.
  5. Emel’yanova I.A., Baranov A.N., Zadorozhnyy A.A., Neporozhnev A.S. Dvukhporshnevoy rastvorobetononasos s kulachkovym privodom i vozvratnoy kulisoy [Twin-piston Concrete Pump Having a Cam Drive and a Reverse Crank]. Naukoviy v³snik bud³vnitstva [Scientific Proceedings of Construction]. Khark³v, 2001, no. 13, pp. 352—360.
  6. Emel’yanova I.A., Zadorozhnyy A.A., Melentsov N.A. Issledovanie raboty klapannykh uzlov universal’nykh dvukhporshnevykh rasstvorobetononasosov [Research into Operation of Valves of Universal Twin-piston Concrete Pumps]. Interstroymekh — 2012. Tr. Mezhdunar. nauch.-tekhn. konf. [Proceedings of International Scientific and Technical Conference Interstroymekh — 2008]. Izhevsk, IzhGTU Publ., 2012, pp. 55—61.
  7. Emel’yanova I.A., Zadorozhnyy A.A., Neporozhnev A.S., Guzenko S.A. Ispol’zovanie komplekta malogabaritnogo oborudovaniya pri provedenii vosstanovitel’nykh rabot na avarinom dome po ulitse Slin’ko ¹ 2b [Using a Set of Small Size Machines in the Course of Reconstruction of a Failing Building Located at 2b Slin’ko Street]. Zb³rnik naukovikh prats’. Ser³ya: Galuzeve mashinobuduvannya, bud³vnitstvo. No. 1 (31), Poltava, PoltNTU Publ., 2012, pp. 25—31.
  8. Zadorozhnyy A.A. Oborudovanie mokrogo torkretirovaniya pri provedenii gidroizolyatsionnykh rabot [Wet Shotcreting Machines in Water Proofing]. Pridn³provs’kiy naukoviy v³snik, Tekhn³chn³ nauki — Dn³propetrovs’k. PASA Publ., 1998, pp. 6—10.
  9. Emel’yanova I.A., Baranov A.M., Blazhko V.V., Tugay V.V. Zm³shuvach dlya prigotuvannya bud³vel’no¿ sum³sh³. Patent No. 74444 S2, Ukraine. MPK 7 V 28 S5 / 14; ¹ 20031213023. Application filed 30.12.03; Application published 15.12.05, Bulletin No. 12, 2 p.
  10. Emel’yanova I.A., Anishchenko A.I., Evel’ S.M., Blazhko V.V., Dobrokhodova O.V., Melentsov N.A. Betonosmesiteli, rabotayushchie v kaskadnom rezhime [Cascade Concrete Mixing Machines]. Kharkiv, Tim Publish Group, 2012, 146 p.

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Method of calculating the parameters of concrete deformation in case of unloading from compressive stress

Vestnik MGSU 3/2014
  • Karpenko Nikolay Ivanovich - Scientific and Research Institute of Construction Physics of the Russian Academy of Architecture and Construction Sciences (NIISF RAASN) Doctor of Technical Sciences, Professor, member, Russian Academy of Architecture and Construction Sciences, Scientific and Research Institute of Construction Physics of the Russian Academy of Architecture and Construction Sciences (NIISF RAASN), 21 Lokomotivnyy proezd, Moscow, 127238, Russian Federation; This e-mail address is being protected from spambots. You need JavaScript enabled to view it .
  • Eryshev Valeriy Alekseevich - Togliatti State University (TGU) Doctor of Technical Sciences, Professor, advisor, Russian Academy of Architecture and Construction Sciences, Togliatti State University (TGU), 14 Belarusskaya st., Togliatti, 445667, Russian Federation; This e-mail address is being protected from spambots. You need JavaScript enabled to view it .
  • Latysheva Ekaterina Valer’evna - Togliatti State University (TGU) Candidate of Technical Sciences, Assosiate Professor, Togliatti State University (TGU), 14 Belarusskaya st., Togliatti, 445667, Russian Federation; This e-mail address is being protected from spambots. You need JavaScript enabled to view it .

Pages 168-178

Deformation parameters of concrete are adequately studied under static uploading of samples until fracture. Methods of their determination during unloading (primarily due to the lack of experimental data) is not presented in the regulatory and scientific literature. That hinders the development of calculating methods of loadings for reinforced concrete structures, which vary according to certain cyclical regularities. The basis for computational models development for unloading are the results of the studies with short-term tests of concrete samples, where the sample is loaded to a predetermined level of compressive stresses, and then it is unloaded. The purpose of the research is to establish an analytical connection between stress and deformation parameters of concrete on axial loading and unloading branches with compressive stresses. The subject of the study is: axial and transverse deformation coefficient of transverse deformation volume deformations. The treated cycles have different values of maximum stress, including close to the limit values, taking into account the dilation of concrete. Permanent deformations during unloading are determined in increments of stress and strain by radial method. A connection is established between the initial elastic modulus of concrete and the modulus of deformation during unloading. On the basis of experimental data the analytical determination of the quantities depending on the residual strains for partial or complete unloading was offered. It was found out that in case of increasing stress level at the beginning of unloading the share of transverse strain increases and in case of full unloading, volume deformations increase. In case of unloading from the stress level, when dilatation property is manifested, they change the sign to the opposite, which is, become positive. The authors show a comparison of calculation results of the proposed method with experimental data obtained.

DOI: 10.22227/1997-0935.2014.3.168-178

References
  1. Karpenko N.I. Obshchie modeli mekhaniki zhelezobetona [General Mechanics Model of Reinforced Concrete]. Moscow, Stroyizdat Publ., 1996, 416 p.
  2. Bondarenko V.M., Kolchunov V.I. Raschetnye modeli silovogo soprotivleniya zhelezobetona [Computational Models of the Power Resistance of Reinforced Concrete. Moscow, ASV Publ., 2004, 471 p.
  3. Stavrov G.N., Rudenko V.V., Fedoseev A.A. Prochnost' i deformativnost' betona pri povtorno-staticheskikh nagruzkakh [Strength and Deformability of Concrete at Re-static Loads]. Beton i zhelezobeton [Concrete and Reinforced Concrete]. 1986, no. 1, pp. 33—34.
  4. Bekker V.A., Sergeev S.M. Osobennosti razvitiya ob"emnykh deformatsiy betonov pri povtornom nagruzhenii szhimayushchey nagruzkoy [Development Features of Volume Deformations of Concrete under Repeated Loading by Compressive Load]. Izvestiya vuzov. Seriya Stroitel'stvo i arkhitektura [News of Higher Education Institutions. Series: Construction and Architecture]. 1983, no. 10, pp. 6—10.
  5. Merkin A.P., Fokin G.A. Kinetika razrusheniya betona pri tsiklicheskikh nagruzheniyakh [Kinetics of Concrete Destruction under Cyclic Loading]. Izvestiya vuzov. Seriya Stroitel'stvo i arkhitektura [News of Higher Education Institutions. Series: Construction and Architecture]. 1982, no. 1, pp. 75—77.
  6. Kuzovchikova E.A., Yashin A.V. Issledovanie vliyaniya malotsiklovykh szhimayushchikh vozdeystviy na deformativnost', prochnost' i strukturnye izmeneniya betona [Investigation of Influence of Low-cycle Compressive Effects on Deformation, Strength and Structural Changes of Concrete]. Izvestiya vuzov. Seriya Stroitel'stvo i arkhitektura [News of Higher Education Institutions. Series: Construction and Architecture]. 1986, no. 10, pp. 30—33.
  7. Rastorguev B.S., Yakovlev S.K. Sovershenstvovanie metoda rascheta ramnykh karkasov pri malotsiklovykh nagruzheniyakh [Improving the Method of Calculating Framework at Low-cycle Loading]. Issledovaniya karkasnykh konstruktsiy mnogoetazhnykh proizvodstvennykh zdaniy [Research of Frame Structures of Multi-storey Industrial Buildings]. 1985, pp. 117—126.
  8. Babich E.M., Pogorelyak A.P., Zalesov A.S. Rabota elementov na poperechnuyu silu pri nemnogokratno povtornykh nagruzheniyakh [Work of the Elements on the Transverse Force in Case of not Frequently Repeated Loadings]. Beton i zhelezobeton [Concrete and Reinforced Concrete]. 1981, no. 6, pp. 8—10.
  9. Eryshev V.A., Latysheva E.V., Bondarenko A.S. Metodika eksperimental'nykh issledovaniy napryazhenno-deformirovannogo sostoyaniya lineynykh zhelezobetonnykh elementov pri osevom zagruzhenii povtornymi i znakoperemennymi nagruzkami [Methodology of Experimental Studies of the Stress-strain State of Linear Reinforced Concrete Elements under Axial Uploading by Repetitive and Alternating Loads]. Vektor nauki Tol'yattinskogo gosudarstvennogo universiteta [Vector of Science of the Togliatti State University]. 2010, no. 3 (13), pp. 51—56.
  10. Berg O.Ya., Shcherbakov E.N., Pisanko G.N. Vysokoprochnyy beton [High-strength Concrete]. Moscow, Stroyizdat Publ., 1971, 208 p.
  11. Karpenko N.I., Eryshev V.A., Latysheva E.V. K postroeniyu diagramm deformirovaniya betona povtornymi nagruzkami szhatiya pri postoyannykh urovnyakh napryazheniy [Developing Concrete Deformation Diagrams by Repeated Compression LOADS at Constant Stress Levels]. Stroitel'nye materialy [Construction Materials]. 2013, no. 6, pp. 48—52.
  12. Eryshev V.A., Toshin D.S. Diagramma deformirovaniya betona pri nemnogokratnykh povtornykh nagruzkakh [Strain Diagram of Concrete at Non-Frequent Repeated Loads]. Izvestiya vuzov. Seriya Stroitel'stvo [News of Higher Education Institutions. Series: Construction]. 2005, no. 10, pp. 109—114.
  13. Hillerborg A. Analysis of one single crack. Report to RILLEM. Tl. 50-FMC. 1981, p. 21.

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Efficiency of fiber reinforced concrete application in structures subjected to dynamic effects

Vestnik MGSU 3/2014
  • Morozov Valeriy Ivanovich - Saint-Petersburg State University of Architecture and Civil Engineering (SPbGASU) Doctor of Technical Sciences, Professor, head, Department of Reinforced Concrete and Masonry Structures, corresponding member of Russian Academy of Architecture and Construction Sciences, Saint-Petersburg State University of Architecture and Civil Engineering (SPbGASU), 4, 2 Krasnoarmeiskaya St., 190005, St. Petersburg, Russian Federation; This e-mail address is being protected from spambots. You need JavaScript enabled to view it .
  • Pukharenko Yuriy Vladimirovich - Saint-Petersburg State University of Architecture and Civil Engineering (SPbGASU) Doctor of Technical Sciences, Professor, head, Department of Building Materials Technology and Metrology, councilor of Russian Academy of Architecture and Construction Sciences, Saint-Petersburg State University of Architecture and Civil Engineering (SPbGASU), 4, 2 Krasnoarmeiskaya St., 190005, St. Petersburg, Russian Federation; This e-mail address is being protected from spambots. You need JavaScript enabled to view it .

Pages 189-196

Fiber reinforced concretes possess high strength under dynamic loadings, which include impact loads, thanks to their high structural viscosity. This is the reason for using them in difficult operating conditions, where increasing the performance characteristics and the structure durability is of prime importance, and the issues of the cost become less significant. Applying methods of disperse reinforcement is most challenging in case of subtle high-porous materials on mineral binders, for example foamed concrete. At the same time, the experiments conducted in Russia and abroad show, that also in other cases the concrete strength resistance several times increases as a result of disperse reinforcement. This doesn't depend on average density of the concrete and type of fiber used. In the article the fibre reinforced concrete impact resistance is analysed. Recommendations are given in regard to fibre concrete application in manufacture of monolithic floor units for industrial buildings and precast piles.

DOI: 10.22227/1997-0935.2014.3.189-196

References
  1. Pukharenko Yu.V. Nauchnye i prakticheskie osnovy formirovaniya struktury i svoystv fibrobetonov: avtoreferat dissertatsii doktora tekhnicheskikh nauk [Scientific and Practical Fundamentals of Fiber Concrete Structure and Properties. Thesis Abstract of the Doctor of Technical Sciences]. Saint Petersburg, 2004, 46 p.
  2. Lobanov I.A., Pukharenko Yu.V., Gurashkin Yu.A. Udarostoykost' fibrobetonov, armirovannykh nizkomodul'nymi sinteticheskimi voloknami [Shock Resistance of Fiber Concretes, Reinforced by Low-modulus Synthetic Fibers]. Tekhnologiya i dolgovechnost' dispersno-armirovannykh betonov [Technology and Durability of Fiber Reinforced Concretes]. Leningrad, LenZNIIEP Publ., 1984, pp. 92—96.
  3. Rabinovich F.N. Kompozity na osnove dispersno-armirovannykh betonov. Voprosy teorii i proektirovaniya, tekhnologii, konstruktsii [Composites Based on Fibre Reinforced Concretes. Problems of Theory and Design, Technologies, Structures]. Moscow, ASV Publ., 2004, 560 p.
  4. Tefaruk Haktanir, Kamuran Ari, Fatih Altun, Cengiz D. Atis, Okan Karahan. Effects of Steel Fibers and Mineral Filler on the Water-tightness of Concrete Pipes. Cement and Concrete Composites. 2006, vol. 28, no. 9, pp. 811—816. DOI: 10.1016/j.cemconcomp.2006.06.002.
  5. Bhikshma V., Manipal K. Study on Mechanical Properties of Recycled Aggregate Concrete Containing Steel Fibers. Asian Journal of Civil Engineering (Building and Housing). 2012, vol. 13, no. 2, pp. 155—164.
  6. Bhikshma V., Singh J.L. Investigations on Mechanical Properties of Recycled Aggregate Concrete Containing Steel Fibers. Indian Concrete Institute Journal. 2010, no. 4—9 (10), pp. 15—19.
  7. Shah P.S., Rangan V.K. Effect of Fiber Addition on Concrete Strength. Indian Concrete Journal. 1994, vol. 5, no. 2—6, pp. 13—21.
  8. Rasheed M.H.F., Agha A.Z.S. Analysis of Fibrous Reinforced Concrete Beams. Engineering and Technical Journal. 2012, no. 30 (6), pp. 974—987.
  9. Morozov V.I., Opbul E.K. Raschet prochnosti izgibaemykh fi brozhelezobetonnykh elementov s vysokoprochnoy armaturoy bez predvaritel'nogo napryazheniya [Strength Calculation of Bending Fiber Reinforced Concrete Elements with High-strength Reinforcement without Preliminary Strain]. Doklad 62 nauchnnoy konferentsii [Report of the 62nd Scientific Conference]. Saint Petersburg, SPbGASU Publ., 2005, Part 1, pp. 210—214.
  10. RTM-17-01—2002. Rukovodyashchie tekhnicheskie materialy po proektirovaniyu i primeneniyu stalefi brobetonnykh stroitel'nykh konstruktsiy [RTM-17-01—2002. Technical Guides on Designing and Calculating Steel Fiber Reinforced Concrete Building Structures]. Moscow, 2003.
  11. Rodov G.S., Leykin B.V., Sterin V.S. Opyt primeneniya stal'nykh fibr diametrom 2 mm i fibr iz otrabotannykh trosov dlya proizvodstva zabivnykh svay: Ekspress-inform [Experience of Using Steel Fibers of 2 mm Diameter and Fibers Made of Used Wires for Producing Drive Piles: Express-Inform]. Stroitel'stvo v rayonakh Urala i Zapadniy Sibiri SSSR. Seriya: Sovershenstvovanie bazy stroitel'stva [Construction in the Regions of South Ural and Western Siberia of the USSR]. TsBNTI Publ. 1987, no. 1, pp. 31—33.

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STUDY OF CORROSION RESISTANCE OF MODIFIED CONCRETEIN THE SEWAGE MEDIUM

Vestnik MGSU 2/2013
  • Koroleva Elena Leonidovna - Bryansk State Academy of Engineering Technology (BSAET) Candidate of Technical Sciences, Associate Professor, Department of Production of Building Structures, Bryansk State Academy of Engineering Technology (BSAET), 3 prospekt St. Dimitrova, 241037, Bryansk, Russian Federation; This e-mail address is being protected from spambots. You need JavaScript enabled to view it .
  • Matveeva Elena Gennad’evna - Bryansk State Academy of Engineering Technology (BSAET) Candidate of Technical Sciences, assistant lecturer, Department of Production of Building Structures, Bryansk State Academy of Engineering Technology (BSAET), 3 prospekt St. Dimitrova, 241037, Bryansk, Russian Federation; This e-mail address is being protected from spambots. You need JavaScript enabled to view it .
  • Naumenko Ol’ga Viktorovna - Bryansk State Academy of Engineering Technology (BSAET) student, Bryansk State Academy of Engineering Technology (BSAET), 3 prospekt St. Dimitrova, 241037, Bryansk, Russian Federation; This e-mail address is being protected from spambots. You need JavaScript enabled to view it .
  • Nyrikova Tat’yana Nikolaevna - Bryansk State Academy of Engineering Technology (BSAET) student, Bryansk State Academy of Engineering Technology (BSAET), 3 prospekt St. Dimitrova, 241037, Bryansk, Russian Federation; This e-mail address is being protected from spambots. You need JavaScript enabled to view it .

Pages 101-107

The objective of the research project was to design multi-component concrete with an optimized pore structure designated for sewage water treatment facilities. It was followed by the study of their stability in aggressive environments. Measurement of mesopores and macropores with diameters of 0.0055 to 360 mcm was taken using AutoPore IV 9500 porosimeter. X-ray analysis of samples was performed using diffractometer ARL X’TRA produced by Thermo Scientific (Switzerland). Modified 28-day concrete cubes were exposed to aggressive environments for 1 year at low (+4 ± 2 °C) and high temperatures (+20 ± 2 °C) to identify their linear deformation characteristics. Compressive strength of samples was tested upon completion of each three-month period.The authors have found out that degradation of concrete samples in the corrosive environment of waste waters accompanied by generation of thaumasite is less intensive than that in the waste waters that have ettringite generated. Thus, the authors have discovered that the lower the temperature of the aggressive environment of the waste water, the more intensive the formation of ettringite that causes destruction of the concrete. Optimization of the concrete structure is attained through the optimization of the concrete composition. Application of fine-grained silica causes generation of concrete that is highly resistant to the aggressive effects of sulfates and chlorides.

DOI: 10.22227/1997-0935.2013.2.101-107

References
  1. Moskvin V.M., Ivanov F.M., Alekseev S.N., Guzeev E.A. Korroziya betona i zhelezobetona, metody ikh zashchity [Corrosion of Concrete and Reinforced Concrete; Methods of Their Protection]. Moscow, Stroyizdat Publ., 1980.
  2. Clark L. Thaumasite Form of Sulfate Attack. Concrete International. Vol. 22, no. 2, February 1999, pp. 37—40.
  3. Zhukov Yu. A. Vliyanie gidrookisi kal’tsiya na razvitie destruktivnykh protsessov v betone pri shchelochnoy korrozii [Influence of Calcium Hydroxide onto Development of Degenerative Processes in the Concrete Exposed to Alkaline Corrosion]. Leningrad, LIIZhT Publ., 1972, 19 p.
  4. Stark J. Alkali-Kiesels?ure-Reaktion. F.A. Finqer Institute f?r Baustoffkunde, 2008, 139 p.
  5. Stanton T. E. Expansion of Concrete through Reaction between Cement and Aggregate. Proc., Amer. Soc. Civ. Eng., 1940, pp. 1781—1811.
  6. Collepardi M. Damage by Delayed Ettringite Formation — a Holistic Approach and New Hypothesis. Concrete International. Vol. 21, no. 1, January 1999, pp. 69—74.
  7. Shtark Y., Bol’mann K., Zayfart K. Yavlyaetsya li ettringit prichinoy razrusheniya betona? [Is Ettringrite the Reason for Concrete Destruction?] Tsement i ego primenenie [Cement and Its Application]. 1998, no. 2, pp. 13—22.
  8. Bazanov S.M. Mekhanizm razrusheniya betona pri vozdeystvii sul’fatov [Pattern of Concrete Destruction in the Event of Exposure to Sulfates]. Stroitel’nye materialy [Construction Materials]. 2004, no. 9, pp. 46—48.
  9. Stanton T.E. Influence of Cement and Aggregate on Concrete Expansion. Engineering News Record, Feb., no. 1, 1940.
  10. Midness S., Young J.F., Darwin D. Concrete. Prentice Hall, Upper Saddle River, NJ, 2002, pp. 142—154.

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New generation waterproofing materials containing vollastonite-basedantigidron system

Vestnik MGSU 3/2013
  • Bezrukov Aleksey Vladimirovich - Moscow State University of Civil Engineering (MGSU) Deputy Director, Centre for Research into construction, design and technology of subterranean structures; postgraduate student, Department of Construction Materials, Moscow State University of Civil Engineering (MGSU), 26 Yaroslavskoe shosse, Moscow, 129337, Russian Federation; This e-mail address is being protected from spambots. You need JavaScript enabled to view it .
  • Lyapidevskiy Boris Vasil’evich - GUP «NIIMosstroy» (State Unitary Enterprise Scientific and Research Institute of Construction in Moscow) Candidate of Technical Sciences, Director, Centre for Research into construction, design and technology of subterranean structures, GUP «NIIMosstroy» (State Unitary Enterprise Scientific and Research Institute of Construction in Moscow), 8 Vinnitskaya St., Moscow, 119192, Russian Federation.
  • Oreshkin Dmitriy Vladimirovich - Moscow State University of Civil Engineering (MGSU) Doctor of Technical Sciences, Chair, Department of Construction Materials; +7 (499) 183-32-29., Moscow State University of Civil Engineering (MGSU), 26 Yaroslavskoe shosse, Moscow, 129337, Russian Federation; This e-mail address is being protected from spambots. You need JavaScript enabled to view it .

Pages 114-119

Major penetrating waterproofing mixtures represent dry mixtures of cement and sand having admixtures, or systems of mineral salts, used to block the structure of capillaries and pores of cement mortars and concretes. Thin layers of waterproofing mortars are applied to sufficiently porous surfaces. As a result, the water content is reduced in the course of hardening. This process causes contraction and cracks in the coating.The findings of the research performed by the authors have proven that waterproofing materials containing wollastonite-based Antigidron system comply with each basic requirement applicable to penetrating waterproofing materials, as their admixtures penetrate into the concrete to seal concrete pores and to generate insoluble crystals.The new Antigidron system has the following strengths. Each component of the proposed system is made in Russia. It has efficient operating properties, and its cost is1.5 — 2 times lower than the one of similar products.

DOI: 10.22227/1997-0935.2013.3.114-119

References
  1. Uretskaya E.A., Batyanovskiy E.I. Sukhie stroitel’nye smesi: materialy i tekhnologii. [Dry Construction Mixtures: Materials and Technologies]. Minsk, NPOOO «Strinko» Publ., 2001.
  2. Dergunov S.A., Rubtsova V.N. Modifikatsiya sukhikh stroitel’nykh smesey [Modifying Dry Construction Mixtures]. Sovremennye tekhnologii sukhikh smesey v stroitel’stve «MixBUILD». Sb. dokladov 6-oy Mezhdunar. nauch.-tekhn. konf. [Modern Technologies for Dry Mixtures in Civil Engineering «MixBUILD». Collected works of the 6th International Scientific and Technical Conference]. St.Petersburg, 2004.
  3. Vikdorovich A.M. Produktsiya Dow Chemical dlya industrii stroitel’nykh materialov [Dow Chemical Products for the Industry of Construction Materials]. Stroitel’nye materialy [Construction Materials]. 2000, no. 5, pp. 10—12.
  4. Meshkov P.I., Mokin V.A. Sposoby optimizatsii sostavov sukhikh stroitel’nykh smesey [Methods of Optimization of Compositions of Dry Construction Mixtures]. Stroitel’nye materialy [Construction Materials]. 2000, no. 5, pp. 12—14.
  5. Uretskaya E.A., Zhukova N.K., Filipchik Z.I. Preimushchestva polimermineral’nykh sukhikh smesey i sovremennye konstruktivno-tekhnologicheskie sistemy zdaniy i stroitel’nye materialy [Strengths of Mineral Polymeric Dry Mixtures and Advanced Structural Systems of Buildings and Construction Materials]. Sbornik trudov BelNIIS [Collected works of Belarus Scientific and Research Institute of Civil Engineering]. Minsk, 1997, pp. 71—73.
  6. Uretskaya E.A., Zhukova N.K., Filipchik Z.I. Modifitsirovannye sukhie stroitel’nye «Polimiks» v sovremennom stroitel›stve [Polymix Modified Dry Construction Mixtures in Contemporary Civil Engineering]. Stroitel’nye materialy [Construction Materials]. 2000, no. 5, pp. 36—38.
  7. Biytts R., Lindernau Kh. Khimicheskie dobavki dlya uluchsheniya kachestva stroitel’nykh rastvorov [Chemical Additives to Improve the Quality of Building Mortars]. Stroitel’nye materialy [Construction Materials]. 1999, no. 3, pp. 13—15.
  8. Dergunov S.A., Rubtsova V.N. Modifikatsiya sukhikh stroitel’nykh smesey [Modification of Dry Construction Mixtures]. Sovremennye tekhnologii sukhikh smesey v stroitel’stve «MixBUILD». Sb. dokladov 6-y Mezhdunar. nauch.-tekhn. konf [Modern Technologies for Dry Mixtures in Civil Engineering «MixBUILD». Collected works of the 6th International Scientific and Technical Conference]. St.Petersburg, 2004, pp. 30-35.
  9. Meshkov P.I., Mokin V.A. Ot gartsovki — k modifitsirovannym sukhim smesyam [From Lime and Sand Mixtures to Modified Dry Mixtures Stroitel’nye materialy [Construction Materials]. 1999, no. 3, pp. 34—35.
  10. Korneev V.I., Zozulya P.V. Slovar’ «Chto» est› «chto» v sukhikh stroitel›nykh smesyakh [Dictionary of Dry Construction Mixtures]. St. Petersburg, NP «Soyuz proizvoditeley sukhikh stroitel’nykh smesey» publ., 2004, 312 p.

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Fibre concrete havinga nanodisperse silica additive

Vestnik MGSU 3/2013
  • Matveeva Elena Gennad’evna - Bryansk State Academy of Engineering and Technology (BGITA) Candidate of Technical Sciences, assistant lecturer, Department of Production of Structural Units, Bryansk State Academy of Engineering and Technology (BGITA), 3 pr. Stanke Dimitrova, Bryansk, 241037, Russian Federation; This e-mail address is being protected from spambots. You need JavaScript enabled to view it .
  • Koroleva Elena Leonidovna - Bryansk State Academy of Engineering Technology (BSAET) Candidate of Technical Sciences, Associate Professor, Department of Production of Building Structures, Bryansk State Academy of Engineering Technology (BSAET), 3 prospekt St. Dimitrova, 241037, Bryansk, Russian Federation; This e-mail address is being protected from spambots. You need JavaScript enabled to view it .

Pages 140-145

The objective of the project described in this article was to design the fiber concrete having an optimized structure and high strength characteristics. In the course of the project development, the fibre concrete was modified by the nanodisperse silica additive. As a result, the authors designed several modified fibre concrete compositions having optimal physical and mechanical properties. Electronic microscope Quanta 200 3D was used to study the microstructure of samples. Diffractometer ARL X’TRA was used to perform the X-ray analysis of samples. Selection of the optimal composition of the concrete was performed using the orthogonal experimental design technique. The nanodisperse silica additive was synthesized using method of chemical polycondensation followed by subsequent stabilization of acetate. This super-plasticizer improves the density and strength properties of the composite. Experimental and statistical models were generated as regression equations to determine the optimal composition of the fibre concrete.

DOI: 10.22227/1997-0935.2013.3.140-145

References
  1. Perfilov V.A., Atkina V.A., Kusmartseva O.A. Fibrobetony s vysokodispersnymi voloknistymi napolnitelyami [Fibre Concretes Having Fine-grained Fibre Fillers]. “Maloetazhnoe stroitel’stvo” v ramkakh Natsional’nogo proekta “Dostupnoe i komfortnoe zhil’e grazhdanam Rossii”; tekhnologii i materialy, problemy i perspektivy razvitiya v Volgogradskoy oblasti. Mezhdunar. nauch.-prakt. konf. [Low-rise Construction within the Framework of Affordable and Comfortable Housing for Russian Citizens National Project. Technologies and Materials, Problems and Prospects for Development of the Volgograd Region. An International Scientific and Practical Conference]. Volgograd, VolgGASU Publ., 2009, pp. 89—91.
  2. Rabinovich F.N. Dispersno-armirovannye betony [Fibre-reinforced Concretes]. Moscow, Stroyizdat Publ., 1989, 176 p.
  3. Rabinovich F.N. O nekotorykh osobennostyakh raboty kompozitov na osnove dispersno-armirovannykh betonov [Particular Behaviour of the Composites Containing Fibre-reinforced Concretes]. Beton i zhelezobeton [Concrete and Reinforced Concrete]. 1998, no. 6, pp. 19—23.
  4. Bischoff P.H., Perry S.H. Compressive Behaviour of Concrete at High Strain Rates. Materials and Structures. 1991, vol. 24, pp. 425—450.
  5. Malvar L.J., Crawford J.E. Dynamic Increase Factors for Concrete. Twenty-Eighth DDESB Seminar. Orlando, FL, August 1998.
  6. Akopov F., Bragov A.M., Demenko P., Kruszka L., Lomunov A.K., Mineev V., Sergeichev L.V. Static and Dynamic Response of Ceramics and Zirconium Alumina Concrete Materials. Journal de Physique IV. France, 2003, vol. 110, pp. 225—230.
  7. Klepaczko J.R. On a Very High Rate Sensitivity of Concrete Failure at High Loading Rates and Impact. Proc. Int. Symp. Brittle Matrix Composites 7, Warsaw, 2003, pp. 1—27.
  8. Chujie Jiao, Wei Sun, Shi Huan, Guoping Jiang. Behavior of Steel Fiber-reinforced High-strength Concrete at Medium Strain Rate. Front. Archit. Civ. Eng. China, 2009, vol. 3, no. 2, pp. 131—136.
  9. Kolsky H. An Investigation of the Mechanical Properties of Material at Very High Rates of Loading. Proc. Phys. Soc. London, 1949, vol. 62B, pp. 676—700.
  10. Campbell J.D., Dowling A.R. The Behaviour of Materials Subjected to Dynamic Incremental Shear Loading. J. Mech. Phys. Solids. 1970, vol.18, pp. 43—63.
  11. Dharan C.K.H., Hauser F.E. Determination of Stress-strain Characteristics at Very High Strain Rates. Exp. Mech. 1970, vol.10, pp. 370—376.
  12. Nicholas T. Tensile Testing of Materials at High Rates of Strain. Exp. Mech. 1981, vol. 21, no. 5, pp. 177—195.

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IDENTIFICATIONOF ALKALI-SILICA REACTION OUTCOMES

Vestnik MGSU 6/2013
  • Korolev Evgeniy Valer’evich - Moscow State University of Civil Engineering (National Research University) (MGSU) Doctor of Technical Sciences, Professor, Advisor of RAACS, Prorector, Director of the “Nanomaterials and Nanotechnologies” Research and Educational Center, Moscow State University of Civil Engineering (National Research University) (MGSU), 26 Yaroslavskoe shosse, Moscow, 129337, Russian Federation; This e-mail address is being protected from spambots. You need JavaScript enabled to view it .
  • Smirnov Vladimir Alekseevich - Moscow State University of Civil Engineering (MGSU) Candidate of Technical Sciences, Associate professor, leading research worker, Research and Educational Center “Nanomaterials and Nanotechnologies”, Moscow State University of Civil Engineering (MGSU), 26 Yaroslavskoe shosse, Moscow, 129337, Russian Federation; This e-mail address is being protected from spambots. You need JavaScript enabled to view it .
  • Zemlyakov Andrey Nikolaevich - Administration of Civil Airports (Airfields) (AGA(A)) Candidate of Technical Sciences, Vice-director on Technology, chief engineer, Administration of Civil Airports (Airfields) (AGA(A)), 28, 5 Voykovskiy proezd, 125171, Moscow, Russian Federation; This e-mail address is being protected from spambots. You need JavaScript enabled to view it .

Pages 109-116

Portland cement-based concrete is widely used in civil engineering. Therefore, it is very important to determine the preconditions of corrosion of the cement concrete. The service life of concrete structures can be substantially reduced by the alkali-silica reaction. It is well known that this reaction causes formation of the sodium silicate hydrogel. Thus, by identifying this gel, a researcher can make an assumption about the reasons for the corrosion. Obviously, macroscopic quantities of sodium salts can be discerned using analytical chemistry methods. Unfortunately, determinant values of such salts in the concrete structure are usually very small. Thus, there is a need for special research methods.Raman spectroscopy is an advanced method based on the analysis of instantaneous two-photon non-elastic light scattering. This method is applicable even in case of small quantities of chemicals under research. The first successful study of silicates using Raman spectroscopy methods was performed in the 20ies of the 20th century. In this work the authors have proven that sodium hydrogels can be easily identified in the concrete using the Raman spectroscopy. In the course of the analysis of the interphase boundary between the cement stone and the aggregates, the authors observed, at least, one spectral peak which did not belong to cement or to the disperse phases of the concrete. At the same time, this peak can be classified as a peak of the sodium silicate. Thus, sodium silicate gel is generated during the service life of the structure under research, and this research has revealed the presence of the alkali-silica reaction.

DOI: 10.22227/1997-0935.2013.6.109-116

References
  1. Swamy R.N. Alkali-silica Reaction in Concrete. New York, Blackie and Son, 1992, 348 p.
  2. Lewis L., Edwards H. Handbook of Raman Spectroscopy. New York, Taylor & Francis, 2001, 1049 p.
  3. Shukshin V.E. Spektroskopiya kombinatsionnogo rasseyaniya sveta kak instrument izucheniya stroeniya i fazovykh perekhodov veshchestva v kondensirovannom sostoyanii [Raman Spectroscopy as a Tool for Research into the Structure and Phase Transition of the Condensed Matter]. Physics and Chemistry of New Materials. 2009. no. 1. Available at: http://phch.mrsu.ru/2009-1/pdf/1-Shukshin.pdf. Date of access: May 15, 2013.
  4. McMillan P. Structural Studies of Silicate Glasses and Melts — Applications and Limitations of Raman Spectroscopy. Amer. Mineralogist. 1984, vol. 69, pp. 622—644.
  5. Vuks M.F., Ioffe V.A. Byull. akad. nauk USSR, tekhn. nauki [Bulletin of the Academy of Sciences of the Ukrainian Soviet Socialist Republic, Engineering Sciences]. 1938, vol. 61, no. 3.
  6. Wilmot G.B. The Raman Spectra and Structure of Silica and Soda-silica Glasses. Massachusetts, Massachusetts Institute of Technology, 1954.
  7. OPUS Spectroscopy Software. Manual. Ettlingen, Bruker Optik, 2006, 456 p.
  8. Kingma K, Hemley R. Raman Spectroscopic Study of Microcrystalline Silica. Amer. Mineralogist. 1994, vol. 79, pp. 269—273.

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CONSTRUCTION OF A DIAGRAM DESCRIBING DEFORMATION OF THE CONCRETE EXPOSED TO A SINGLE DYNAMIC FORCE WITH ACCOUNT OF PRESTRESSES PRODUCED BY THE STATIC LOAD

Vestnik MGSU 7/2012
  • Tsvetkov Konstantin Aleksandrovich - Moscow State University of Civil Engineering (MGSU) Candidate of Technical Sciences, Associate Professor, Department of Strength of Materials; +7 (499) 183-43-29, Moscow State University of Civil Engineering (MGSU), 26 Yaroslavskoe shosse, Moscow, 129337, Russian Federation; This e-mail address is being protected from spambots. You need JavaScript enabled to view it .
  • Bazhenova Aleksandra Vladimirovna - Moscow State University of Civil Engineering (MSUCE) master student, Moscow State University of Civil Engineering (MSUCE), 26 Yaroslavskoe shosse, Moscow, 129337, Russian Federation.
  • Bezgodov Igor' Mikhaylovich - Moscow State University of Civil Engineering (MSUCE) Researcher, Moscow State University of Civil Engineering (MSUCE), 26 Yaroslavskoe shosse, Moscow, 129337, Russian Federation.

Pages 152 - 158

The authors describe methods of composing a concrete dynamic deformation diagramme, if the pre-stress produced by the static load is taken into account. It is noteworthy that the available data concerning the influence of the load preceding any dynamic load and produced on the mechanical properties of the concrete are limited and discrepant. The authors propose their methodology of an experiment and describe items of specialized equipment employed to hold the experiment in question. The authors have held an experimental study to reproduce the conditions of a real structure exposed to an emergency dynamic load. Samples to be tested are exposed to the static load of varied intensity without any relief. Duration of the load application will be six months. The diagram should be recommended for reference in the course of design of concrete and reinforced concrete structures exposed to dynamic loads applied in emergency situations.

DOI: 10.22227/1997-0935.2012.7.152 - 158

References
  1. Bazhenov Yu.M. Beton pri dinamicheskom nagruzhenii [Concrete Exposed to Dynamic Loading]. Moscow, Stroyizdat Publ., 1970, 272 p.
  2. Prokopovich I.E., Kobrinets V.M., Polovets V.I., Tvardovskiy I.A. Vliyanie rezhima prilozheniya szhimayushchey nagruzki na dlitel’noe soprotivlenie betona [Influence of the Compression Load Pattern on the Long-term Concrete Strength]. Beton i zhelezobeton [Concrete and Reinforced Concrete]. 1991, no. 6, pp. 6—8.
  3. Brodskiy V.V. Soprotivlenie dinamicheskim impul’snym vozdeystviyam predvaritel’no napryazhennykh betonnykh elementov i zhelezobetonnykh kolonn [Resistance of Pre-stressed Concrete Elements and Reinforced Concrete Columns to Dynamic Pulse Forces]. Rostov-Don, 2001, 23 p.
  4. Kirillov A.P. Prochnost’ betona pri dinamicheskikh nagruzkakh [Concrete Strength If Exposed to Dynamic Loads]. Beton i zhelezobeton [Concrete and Reinforced Concrete]. 1987, no. 2, pp. 38—39.
  5. Tsvetkov K.A. Vliyanie dinamicheskogo nagruzheniya na prochnostnye i deformativnye svoystva betona pri odnoosnykh i dvuosnykh napryazhennykh sostoyaniyakh [Dynamic Loading Influence on Concrete Strength and Deformation-related Properties in the Event of Mono-axial and Bi-axial Stress States]. Moscow, MSUCE, 2007.
  6. Tsvetkov K.A. Osnovnye rezul’taty eksperimental’no-teoreticheskikh issledovaniy prochnostnykh i deformativnykh svoystv betona pri dinamicheskom nagruzhenii v usloviyakh odnoosnogo i dvukhosnogo szhatiya [Key Results of Experimental and Theoretical Researches of the Concrete Strength and Deformation-related Properties under Dynamic Loading in the Event of Mono-axial and Biaxial Compression]. Vestnik MGSU [Proceedings of Moscow State University of Civil Engineering]. 2007, no. 3, pp. 109—120.
  7. Malashkin Yu.N., Bezgodov I.M., Tsvetkov K.A. Metodicheskie osobennosti issledovaniya deformativno-prochnostnykh kharakteristik betona pri dinamicheskom nagruzhenii v usloviyakh slozhnykh napryazhennykh sostoyaniy [Methodological Features of Research of Concrete Deformation and Strength-related Properties under Dynamic Loading in Complex Stress States]. Estestvennye i tekhnicheskie nauki [Natural and Technical Sciences], 2007, no. 1, pp. 182—190.
  8. Tsvetkov K.A. Vliyanie dinamicheskogo nagruzheniya na prochnost’ i deformativnye kharakteristiki betona pri odnoosnom rastyazhenii i napryazhennom sostoyanii “szhatie-rastyazhenie” [Dynamic Loading Influence on Concrete Durability and Deformation-related Properties under Mono-axial Strain and in the “Stress-Strain” State]. Estestvennye i tekhnicheskie nauki [Natural and Technical Sciences]. 2007, no. 4, pp. 294—298.

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EFFICIENT NON-DESTRUCTIVE METHOD OF CONTROL OVER THE FROST-RESISTANCE OF CONCRETES DESIGNATED FOR HYDRAULIC ENGINEERING STRUCTURES

Vestnik MGSU 8/2012
  • Popov Valeriy Petrovich - Samara State University of Architecture and Civil Engineering Doctor of Technical Sciences, Professor 8 (846) 242-17-84, Samara State University of Architecture and Civil Engineering, 194 Molodogvardeyskaya str., Samara, 443001, Russian Federation; This e-mail address is being protected from spambots. You need JavaScript enabled to view it .

Pages 139 - 142

The author considers the problem of control over the frost resistance as the most important
characteristic of concretes designated for hydraulic engineering structures. His method is based on
the identification of correlation between the frost resistance and the Poisson ratio. The value of the
Poisson ratio is measurable through the employment of the ultra-sound method.
The proposed methodology contemplates the following sequence of acts. First, the value of
the Poisson ratio of air-dried samples of concrete is identified through the employment of the ultrasound
method. Thereafter, samples are exposed to cyclic freezing and thawing. Based on the testing
results, correlation between the Poisson ratio values and the frost resistance of the concrete is
identified. Further, the same ultrasound method is used to find out the values of the Poisson ratio of
the hydraulic engineering structures on site to identify the value of the frost resistance of the concrete
on the basis of the correlation identified earlier.
Mass produced ultrasound testing devices are to be used for the above purposes. They must
have screens, and their ultrasound range must fit concretes. Poisson ratio values are identified
through the penetration of the ultrasound signal through the thickness of a concrete element under
control. Sensors are to be positioned at the angle of 45°, and the time of travel of longitudinal and
shear (lateral) ultra-sound waves through the thickness of a concrete sample or a concrete element
is measured. The time of travel of longitudinal waves is measured on the basis of the value of the
first signal, while shear waves are measured on the basis of the phase transition of ultrasound
waves. Thereafter, velocities of waves are calculated pursuant to the methodology proposed by the
author. It is noteworthy that the accuracy of the proposed method is quite high, and the margin of
error does not exceed 3 %.

DOI: 10.22227/1997-0935.2012.8.139 - 142

References
  1. GOST 10060—95. Betony. Metody opredeleniya morozostoykosti. [State Standard 10060-95. Concretes. Methods of Identification of Their Frost Resistance].
  2. Popov V.P. Prognozirovanie resursa dolgovechnosti betona akusticheskimi metodami na osnove mekhaniki [Projection of Durability of Concretes by Mechanics-based Acoustic Methods]. St.Petersburg, PGUPS [Petersburg State Transport University]. 1998, 247 p.
  3. MI 11-74. Metodika po opredeleniyu prochnostnykh i deformatsionnykh kharakteristik pri odnoosnom kratkovremennom szhatii [MI 11-74. Method of Identification of Strength and Deformation-related Properties in the Event of a Single-Axis Short-Term Compression]. Moscow, Standarty Publ., 1975, 68 p.
  4. Moskvin V.M., Kapkin M.M., Savitskiy A.N., Yarmakovskiy V.N. Beton dlya stroitel’stva v surovykh klimaticheskikh usloviyakh [Concrete Designated for Construction In the Unfavourable Climatic Environment]. Leningrad, Stroyizdat Publ., 1973, 167 p.
  5. Berg O.Ya. Fizicheskie osnovy teorii prochnosti betona i zhelezobetona [Basic Physics That Underlies the Strength of Concrete and Reinforced Concrete]. Moscow, Gosstroyizdat Publ., 1961, 125 p.
  6. Zaytsev Yu.V. Modelirovanie deformatsiy i prochnosti betona metodami mekhaniki razrusheniya [Modeling of Concrete Deformations and Strength through the Employment of Methods of Fracture Mechanics]. Moscow, Stroyizdat Publ., 1982, 196 p.

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CHANGES OF CONSTRUCTION MATERIAL PROPERTIES WITH ADDITION OF BACTERIAL CELL BIOMASS POSSESSING UREASE ACTIVITY INTO THE MATERIALS

Vestnik MGSU 7/2017 Volume 12
  • Stepanov Nikolay Alekseevich - Lomonosov Moscow State University (MSU) Doctor of Technical Sciences, Scientific Researcher of Chemical Enzymology Department, Lomonosov Moscow State University (MSU), 1 Lenin Hills, Moscow, 119991, Russian Federation.
  • Efremenko Elena Nikolaevna - Lomonosov Moscow State University (MSU) Doctor of Biological Sciences, Professor of Chemical Enzymology Department, Lomonosov Moscow State University (MSU), 1 Lenin Hills, Moscow, 119991, Russian Federation.
  • Bruyako Mikhail Gerasimovich - Moscow State University of Civil Engineering (National Research University) (MGSU) Doctor of Technical Sciences, Associated Professor of the Department of Technologies of Cohesive Materials and Concretes, Moscow State University of Civil Engineering (National Research University) (MGSU), 26 Yaroslavskoe shosse, Moscow, 129337, Russian Federation.
  • Grigoreva Aleksandra Igorevna - Moscow State University of Civil Engineering (National Research University) (MGSU) Postgraduate Student, Department of Technologies of Cohesive Materials and Concretes, Moscow State University of Civil Engineering (National Research University) (MGSU), 26 Yaroslavskoe shosse, Moscow, 129337, Russian Federation.

Pages 788-796

Results of research that aimed on appearance of self-healing ability between characteristics of construction materials and products, based on mineral binding substances, via bioprocesses of selective action, resulting from the introduction of bacterial biomass into the composition of mortar and consruction cement mixes were shown in the article. The article contains the results of revealing the most active forms of biological material adapted to the conditions of formation of building products based on mineral binders and results of investigating their effect on the rheological, technological and operational properties of mortars that are modified. Portland cement and gypsum binder were used as mineral binders to produce solution mixtures with different pH values. Efficiency of bacterial cell action was determined via estimation of cell urease activity. The variations of values of water-cement ratio appeared to be pronounced in dependence on: concentrations of introduced cell biomass content; changes in the urease activity of the bacterial cells, varied with the values of pH of used medium; the use of both highly porous natural and artificial materials as microcontainer carriers. The obtained results make it possible to conclude about significant change in the rheological properties of cement-sand mortars owing to the presence of biological surfactants entering into a content of bacterial cells. The influence of cells concentration on a setting time and strength characteristics of cement-sand mortars was determined.

DOI: 10.22227/1997-0935.2017.7.788-796

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Concrete and reinforced concrete - glance at future

Vestnik MGSU 4/2014
  • Tamrazyan Ashot Georgievich - Moscow State University of Civil Engineering (National Research University) (MGSU) Doctor of Technical Sciences, Professor, full member, Russian Engineering Academy, head of the directorate, Moscow State University of Civil Engineering (National Research University) (MGSU), 26 Yaroslavskoe Shosse, Moscow, 129337, Russian Federation; This e-mail address is being protected from spambots. You need JavaScript enabled to view it .

Pages 181-189

In the article the information on the upcoming international conference on concrete and reinforced concrete is offered. The aim of the conference is stated, as well as the main points of the program, composition of the conference, the papers’ subject is disclosed. The author highlights the effect of reinforced concrete invention on the world civilization development. According to the author’s point of view, today reinforced concrete became one of the most evident means of the world development.

DOI: 10.22227/1997-0935.2014.4.181-189

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RESEARCH OF EARLY STRUCTURE FORMATION PROCESS OF CONCRETE WHERE CONCRETE WASTE ARE USED AS CRUSHED STONE

Vestnik MGSU 1/2012
  • Puljaev Sergej Mihajlovich - Moscow State University of Civil Engineering (MGSU) Candidate of Engineering Sciences (PhD), Prof +7-(499)-188-01-02, Moscow State University of Civil Engineering (MGSU), 26, Jaroslavskoe shosse, Moskow, 129337, Russia; This e-mail address is being protected from spambots. You need JavaScript enabled to view it .
  • Kaddo Maria Borisovna - Moscow State University of Civil Engineering (MGSU) Candidate of Engineering Sciences (PhD), Prof +7-(499)-183-35-29, Moscow State University of Civil Engineering (MGSU), 26, Jaroslavskoe shosse, Moskow, 129337, Russia; This e-mail address is being protected from spambots. You need JavaScript enabled to view it .
  • Puljaev Ivan Sergejevich - Research Institute of Transport Construction (TSNIIS) Candidate of Engineering Sciences (PhD), Senior staff scientist +7-(499)-189-33-45, Research Institute of Transport Construction (TSNIIS), 1, Kolskaya str., Moskow, 129329, Russia; This e-mail address is being protected from spambots. You need JavaScript enabled to view it .

Pages 68 - 71

The process of early structure formation that occurs in hardening concrete where concrete waste are used as coarse aggregate is examined in this article.

DOI: 10.22227/1997-0935.2012.1.68 - 71

References
  1. Bazhenov J.M., Gorchakov G.I., Alimov L.A., Voronin V.V. Povyshenie dolgovechnosti betona i zhelezobetonnyh konstrukcij v surovyh klimaticheskih uslovijah [Increase of durability of concrete and ferroconcrete designs in severe environmental conditions]. Moscow, MISI, 1984.
  2. Bazhenov J.M., Gorchakov G.I., Alimov L.A., Voronin V.V. Strukturnye harakteristiki betonov [Structural descriptions of concretes]. Beton i zhelezobeton [Concrete and reinforced concrete], 1972, ¹ 9.
  3. Gorchakov G.I., Alimov L.A., Voronin V.V., Sobolev G.M. Princip optimizacii sostavov betonov dlja jenergeticheskogo stroitel'stva s uchetom strukturnyh harakteristik [Principle of optimization of compositions of concretes for power building taking into account structural descriptions]. Jenergeticheskoe stroitel'stvo : sb. nauchnyh trudov [Energy construction, Collection of scientific works], ¹ 9, 1974.

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