ARCHITECTURE AND URBAN DEVELOPMENT. RESTRUCTURING AND RESTORATION

RESIDENTIAL ARCHITECTURE OF YEREVAN IN THE 20TH CENTURY. MAIN STAGES OF DEVELOPMENT OF THE PROCESS OF YARD PUBLIC SPACE ORGANIZATION

Vestnik MGSU 3/2018 Volume 13
  • Azatyan Karen Rubenovich - National University of Architecture and Construction of Armenia (NUACA) Candidate of Architecture, Associate Professor, Department of Architectural Drafting and Architectural Environment Design, National University of Architecture and Construction of Armenia (NUACA), 105 Teryan str., Yerevan, 0009, Armenia; This e-mail address is being protected from spambots. You need JavaScript enabled to view it .

Pages 301-308

Subject: for many centuries the yard was the social centre of residential development. However, the problems of its spatial organization often do not receive appropriate attention in modern cities. The city of Yerevan, in this sense, is also not an exception, where the new socio-economic conditions that emerged in the early 1990s led to radical changes in the residential development organization. Under this impact, a serious transformation has also been made to the yard space, which is the subject of this study. Research objectives: identification of the main stages of the yard space evolution in the residential building development of Yerevan in the 20th century and the revelation of its characteristic features. Materials and methods: the work is carried out on the basis of observations and published sources by the method of theoretical research, analysis and generalization of the material. Results: the work is composed of the following thematic subdivisions: the yard in the structure of traditional housing (in residential buildings of the 19th and early 20th centuries); development of the yard space in the new format of perimeter-quarter development (in the system of perimeter development of streets in the 1920-1950s); problems of yard organization in open compositions of building development (in the new forms of free building development by standardized elements in 1960s); attempts of yard restoration in the systematized compositions of building development (in the process of formation of large complexes of building development in 1970-1980s); loss of the yard space in contemporary conditions (in the residential building development formed since 1990s in the new socio-economic conditions). Conclusions: based on the results of the analysis, classification of the main stages of the yard space organization evolution during the last century is presented. This classification must be included in the process of the general study of development of residential architecture of Yerevan in the 20th century.

DOI: 10.22227/1997-0935.2018.3.301-308

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STUDY OF THE KINETICS OF HYDRATION STRUCTURING AND THE PROPERTIES OF LIME-BELITIC BINDERS BASED OF MARL

Vestnik MGSU 4/2016
  • Zhukov Aleksey Dmitrievich - Moscow State University of Civil Engineering (National Research University) (MGSU) Candidate of Technical Sciences, Associate Professor, Department of Composite Materials Technology and Applied Chemistry, 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 .
  • Asamatdinov Marat Orynbaevich - Moscow State University of Civil Engineering (National Research University) (MGSU) postgraduate student, Department of Composite Materials Technology and Applied Chemistry, 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 .
  • Nurymbetov Bakhtiyar Chimbergenovich - Karakalpak State University named after of Berdakh (KSU) Candidate of Technical Sciences, Associate Professor, Karakalpak State University named after of Berdakh (KSU), 1 Ch. Abdirova str., Nukus, 230112, Republic of Uzbekistan; This e-mail address is being protected from spambots. You need JavaScript enabled to view it .
  • Turemuratov Sharibay Nauryzbaevich - Karakalpak State University named after of Berdakh (KSU) Candidate of Chemical Sciences, Karakalpak State University named after of Berdakh (KSU), 1 Ch. Abdirova str., Nukus, 230112, Republic of Uzbekistan; This e-mail address is being protected from spambots. You need JavaScript enabled to view it .

Pages 62-68

Lime-belite binder is obtained by low-temperature firing of natural marl, marling or sanding limestone and artificial lime-silica mixtures. The binder with calcium oxide also contains significant amounts of dicalcium silicate and some others materials, the composition and quantity of which depend on the chemical composition and firing temperature of the raw materials used. The authors investigated the kinetics of hydration structures and physicochemical properties of lime-based binders on the basis of belitic marl from Akburly and Porlytau. The formation of resistance is associated not only with the formation of the system of different types of structures - coagulation and crystallization, with the transition of the first to the second, but also with the different stages of formation of crystal structures. The possibility of using lime-belitic binders for the preparation of high-strength products of autoclave hardening is proved. The autoclaved binders used in the manufacture of sand-lime products are prepared with the use of mixtures consisting of 60...70 % lime-belite binder and 30...40 % ground quartz sand.

DOI: 10.22227/1997-0935.2016.4.62-68

References
  1. Turemuratov Sh.N., Nurymbetov B.Ch., Adylov D.K. Sintez i issledovaniya izvestkovo-belitovogo vyazhushchego na osnove mergelya Akburlinskogo mestorozhdeniya [Synthesis and Study of Lime-Belite Binder Based on Marl of Akburlinskiy Deposit]. Nauka i obrazovanie Yuzhnogo Kazakhstana [Science and Education of South Kazahstan]. 2000, no. 11, pp. 223—225. (In Russian)
  2. Korovyakov V.F. Perspektivy primeneniya vodostoykikh gipsovykh vyazhushchikh v sovremennom stroitel’stve [Prospects of Application of Water-Resistant Gypsum Binders in Modern Construction]. Povyshenie effektivnosti proizvodstva i primeneniya gipsovykh materialov i izdeliy : materialy Vserossiyskogo seminara [Improving the Efficiency of Production and Use of Gypsum Materials and Products : Proceedings of All-Russian Seminar]. Moscow, RAASN Publ., 2002, pp. 51—56. (In Russian)
  3. Nurymbetov B.Ch., Adylov D.K., Turemuratov Sh.N. Regulirovanie aktivnosti izvestkovo-belitovogo vyazhushchego s dobavkoy rastvorimogo gipsa [Regulation of the Activity of Calc-Belite Binder with Addition of Soluble Gypsum]. Vestnik Oshskogo gosudarstvennogo universiteta. Serii: Khimiya i khimicheskaya tekhnologiya [Bulletin if the Osh State University. “Chemistry and Chemical Technology” Series]. 2001, no. 2, pp. 204—207. (In Russian)
  4. Efimenko A.Z., Pilipenko A.S. Upravlenie proizvodstvom i postavkami komplektov izdeliy i konstruktsiy predpriyatiyami stroyindustrii [Management of Production and Delivery of Product and Structure Sets by Construction Industry Enterprises]. Promyshlennoe i grazhdanskoe stroitel’stvo [Industrial and Civil Engineering]. 2013, no. 9, pp. 65—67. (In Russian)
  5. Sokov V.N., Beglyarov A.E., Zhabin D.V., Zemlyanushnov D.Yu. O vozmozhnostyakh sozdaniya effektivnykh teploizolyatsionnykh materialov metodom kompleksnogo vozdeystviya na aktivnye podvizhnye massy gidroteplosilovym polem [On Possibilities of Obtaining Efficient Thermal Insulating Materials Using the Method of Complex Effect on Active Moving Masses by Hydro-Thermal-Power Field]. Promyshlennoe i grazhdanskoe stroitel’stvo [Industrial and Civil Engineering]. 2012, no. 9, pp. 17—19. (In Russian)
  6. Orlova A.M., Grigor’eva L.S., Volov A.D., Kryukova V.M. Razrabotka sistemy gazoobrazovateley dlya porizovannykh gipsov [Development of a System of Pore-Forming Agents for Porous Gypsum]. Vestnik MGSU [Proceedings of Moscow State University of Civil Engineering]. 2011, no. 1—2, pp. 304—308. (In Russian)
  7. Zhukov A.D., Orlova A.M., Naumova T.A., Nikushkina T.P., Mayorova A.A. Ekologicheskie aspekty formirovaniya izolyatsionnoy obolochki zdaniy [Environmental Aspects of the Formation of the Insulating Sheath of Buildings]. Nauchnoe obozrenie [Scientific Review]. 2015, no. 7, pp. 209—212. (In Russian)
  8. Ovcharenko E.G. Tendentsii v razvitii proizvodstva utepliteley v Rossii [Development Trends in the Production of Thermal Insulation in Russia]. RosTeplo.ru. Available at: http://www.rosteplo.ru/Tech_stat/stat_shablon.php?id=172. (In Russian)
  9. Gagarin V.G. Makroekonomicheskie aspekty obosnovaniya energosberegayushchikh meropriyatiy pri povyshenii teplozashchity ograzhdayushchikh konstruktsiy zdaniy [Macroeconomic Aspects of the Substantiation of Energy Saving Measures by Increasing the Thermal Protection of Enclosing Structures of Buildings]. Stroitel’nye materialy [Construction Materials]. 2010, no. 3, pp. 8—16. (In Russian)
  10. Rumyantsev B.M., Zhukov A.D., Smirnova T.V. Energeticheskaya effektivnost’ i metodologiya sozdaniya teploizolyatsionnykh materialov [Energy Efficiency and Methodology of Producing Thermal Insulating Materials]. Internet-Vestnik VolgGASU. Seriya: Politematicheskaya [Internet Proceedings of Volgograd State University of Architecture and Civil Engineering. Series: Polythematic]. 2014, no. 4 (35), art. 3. Available at: http://vestnik.vgasu.ru/?source=4&articleno=1789. (In Russian)
  11. Rumyantsev B.M., Zhukov A.D. Teploizolyatsiya i sovremennye stroitel’nye sistemy [Thermal Insulation and Modern Building Systems]. Krovel’nye i izolyatsionnye materialy [Roofing and Insulation Materials]. 2013, no. 6, pp. 11—13. (In Russian)
  12. Oreshkin D.V., Semenov V.S. Sovremennye materialy i sistemy v stroitel’stve — perspektivnoe napravlenie obucheniya studentov stroitel’nykh spetsial’nostey [Modern Materials and Systems in the Construction as a Perspective Direction of Teaching Students of Construction Specialties]. Stroitel’nye materialy [Construction Materials]. 2014, no. 7, pp. 92—94. (In Russian)

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EFFECTS OF FINELY DISPERSED FILLER ON THE CALCIUM SILICATE FORMATION

Vestnik MGSU 4/2017 Volume 12
  • Nurymbetov Bakhtiyar Chimbergenovich - Karakalpak State University named after Berdakh (KSU named after Berdakh) Candidate of Technical Sciences, Karakalpak State University named after Berdakh (KSU named after Berdakh), 1 Ch. Abdirova str., Nukus, Republic of Uzbekistan, 230100.
  • Turemuratov Sharibay Nauryzbaevich - Karakalpak Scientific Research Institute of Natural Sciences of the Karakalpak Branch of the Academy of Sciences of the Republic of Uzbekistan (Karakalpak Scientific Research Institute of Natural Sciences of KKB AS RUz) Candidate of Chemical Sciences, Karakalpak Scientific Research Institute of Natural Sciences of the Karakalpak Branch of the Academy of Sciences of the Republic of Uzbekistan (Karakalpak Scientific Research Institute of Natural Sciences of KKB AS RUz), 41 Berdakha Street, Nukus, Republic of Uzbekistan, 230100.
  • Zhukov Aleksey Dmitrievich - Moscow State University of Civil Engineering (National Research University) (MGSU) Candidate of Technical Sciences, Associate Professor, Department of Composite Materials Technology and Applied Chemistry, Moscow State University of Civil Engineering (National Research University) (MGSU), 26 Yaroslavskoe shosse, Moscow, Russian Federation, 129337.
  • Asamatdinov Marat Orynbaevich - Moscow State University of Civil Engineering (National Research University) (MGSU) postgraduate student, Department of Composite Materials Technology and Applied Chemistry, Moscow State University of Civil Engineering (National Research University) (MGSU), 26 Yaroslavskoe shosse, Moscow, Russian Federation, 129337.

Pages 446-451

Lime-belite binder is obtained by firing natural marls, marlized or sanded limestones, as well as artificial silica-containing mixtures at temperatures of about 1000 °C with exposure of 90 minutes. Along with calcium oxide, the binder contains significant amounts of dicalcium silicate and some other minerals the composition and quantity of which depend on the chemical composition and firing temperature of the raw materials. However, silicon oxide is not enough to form in the firing products of raw marl the required amount of belite needed to obtain high strength properties. The main research purposes were selection of the initial compositions and study of the chemical and mineralogical binder compositions on the basis of marls of the Akburly and Porlytau deposits in order to increase the content of belite (?-С2S) in the heat treatment products and obtain a high-strength binder. 5, 10 and 20 % of ground quartz sand were injected into the raw material to increase the content of belite (?-С2S) in heat treatment products and obtain the high-strength binder. The quartz sand was ground up until it completely passed through a 008 sieve. The specific surface area was within the range 2500 ... 3200 cm2/g. It was shown that the basicity constant decreases as the sand content increases, and the content of aluminates, ferrites and calcium sulphates is almost unchanged, since the sand contains no clay components. The study results of joint heat treatment of marls and ground quartz sand suggest that the optimum sand content in the raw mix should be 10 %. With such proportions of heat-treated raw material components, their interactions result in the formation of a relatively large amount of belite which will provide the high strength properties of products based on this binder.

DOI: 10.22227/1997-0935.2017.4.446-451

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