MATH MODELING OF CAST FINE-GRAINED CONCRETE WITH INDUSTRIAL WASTES OF COPPER PRODUCTION

Vestnik MGSU 10/2017 Volume 12
  • Kravtsov Aleksey Vladimirovich - Kostroma State Agricultural Academy (KSAA) Postgraduate student, Department of Building Technology, Management and Economy, Kostroma State Agricultural Academy (KSAA), 34 Uchebniy gorodok, Karavaevo poselok, Kostroma oblast, 156530, Russian Federation.
  • Tsybakin Sergey Valerievich - Kostroma State Agricultural Academy (KSAA) Candidate of Technical Sciences, Associate Professor, Dean of the Faculty of Architecture and Civil Engineering, Kostroma State Agricultural Academy (KSAA), 34 Uchebniy gorodok, Karavaevo poselok, Kostroma oblast, 156530, Russian Federation.
  • Kuznetsova Ekaterina Fedorovna - Kostroma State Agricultural Academy (KSAA) Candidate of Technical Sciences, Associate Professor, Department of Constrcution Technology, Management and Economy, Kostroma State Agricultural Academy (KSAA), 34 Uchebniy gorodok, Karavaevo poselok, Kostroma oblast, 156530, Russian Federation.
  • Evseeva Tatyana Michaylovna - Kostroma State Agricultural Academy (KSAA) Master's Student, Kostroma State Agricultural Academy (KSAA), 34 Uchebniy gorodok, Karavaevo poselok, Kostroma oblast, 156530, Russian Federation.

Pages 1132-1144

Subject: applying mineral microfillers on the basis of technogenic wastes of non-ferrous metallurgy in the technology of cast and self-compacting concrete. The results of experiments of scientists from Russia, Kazakhstan, Poland and India show that copper smelting granulated slag can be used when grinding construction cements as a mineral additive up to 30 % without significantly reducing activity of the cements. However, there are no results of a comprehensive study of influence of the slag on plastic concrete mixtures. Research objectives: establishment of mathematical relationship of the influence of copper slag on the compressive strength and density of concrete after 28 days of hardening in normal conditions using the method of mathematical design of experiments; statistical processing of the results and verification of adequacy of the developed model. Materials and methods: mathematical experimental design was carried out as a full 4-factor experiment using rotatable central composite design. The mathematical model is selected in the form of a polynomial of the second degree using four factors of the response function. Results: 4-factor mathematical model of concrete strength and density after curing is created, regression equation is derived for dependence of the 28-days strength function and density on concentration of the cement stone, true water-cement ratio, dosage of fine copper slag and superplasticizer on the basis of ether polycarboxylates. Statistical processing of the results of mathematical design of experiments is carried out, estimate of adequacy of the constructed mathematical model is obtained. Conclusions: it is established that introduction of copper smelting slag in the range of 30…50 % by weight of cement positively affects the strength of concrete when used together with the superplasticizer. Increasing the dosage of superplasticizer in excess of 0.16 % of the dry component leads to a decrease in the strength of cast concrete. The developed compositions of cast fine-grained concrete mixtures can be used in high-density reinforcement concrete structures with strict requirements for size of fillers and plasticity of mixture.

DOI: 10.22227/1997-0935.2017.10.1132-1144

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APPLICATION ASPECTS OF METHODOLOGY OF CREATION OF THE UNIFIED BUILDING WASTE TREATMENT SYSTEM

Vestnik MGSU 2/2017 Volume 12
  • Tskhovrebov Eduard Stanislavovich - Research Institute “Center for Environmental Industrial Policy” (Research Institute “CEIP”) Candidate of Economics, Associate Professor, Deputy Director, Research Institute “Center for Environmental Industrial Policy” (Research Institute “CEIP”), 42 Olimpiyskiy pr., Mytishchi, Moscow Region, Russian Federation, 141006.
  • Velichko Evgeniy Georgievich - Moscow State University of Civil Engineering (National Research University) (MGSU) Doctor of Technical Sciences, Professor, Department of Construction Materials, Moscow State University of Civil Engineering (National Research University) (MGSU), 26 Yaroslavskoe shosse, Moscow, 129337, Russian Federation.

Pages 201-2013

Methodology of research of economic efficiency of management and control of hazardous waste treatment includes determination and formulation of fundamental algorithms, guidelines and restrictions as the basic constituents. These make it possible to perform the research more consistently, in an unbiased manner, in the context of the set goals and objectives. The priority for formation of the model of the unified building waste treatment system is the determination of restrictions dictated by the legislative framework in the sphere of environmental protection, public health, waste treatment, radiation, fire and technical security, traffic and cargo transportation safety rules, urban planning, as well as by technological and economic conditions, territorial, natural and climatic features, industrial and production capacities, potential risks. The article considers various aspects of methodology of creation of economical model of the unified building waste treatment system generated with regard to the requirements of regulatory legal acts in the sphere of hazardous waste treatment, environmental safety, rational use of natural resources and environmental protection in terms of sustainable innovative development of the Russian economy at the present stage. Approaches to the unified building waste treatment system creation methodology proposed by the authors is an attempt to find scientifically based organizational and managerial ways of solution of urgent and crucial tasks of ecological security, energy and resource saving, conservation, recycling of waste into secondary products; the sustainable innovative development of the Russian state is impossible without the aforesaid solution.

DOI: 10.22227/1997-0935.2017.2.201-213

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