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CREEP FINE CARBONATE CONCRETE AT DIFFERENT STRESS LEVELS
Authors: V.V. Belov, T.R. Barkaya, P.V. Kulyaev
Abstract: The paper presents the results of study of instant and short-term creep of fine-grained carbonate concrete under different stress levels, as compared to those of ordinary concretes. The article reveals creep strain values alteration as regards applied load values and days of exposure and depending on limestone powder and superplasticizer content. The comparison of test figures of the basic concrete composition and fine-grained carbonate concrete composition also have been presented.
Keywords: fine carbonate concrete, deformation properties, creep, loading levels
USE OF GLASS CLADDING
AS SECONDARY AGGREGATE IN CEMENT CONCRETE
Authors: E.A. Zelenev, V.V. Belov
Abstract: Possibilities for development of resource-saving technology for production of concrete mixtures using glass-glass as coarse aggregate for manufacture of monolithic floors are considered. We have studied the methods of using glass glass as a material for construction, the prospects for its use as aggregate for concretes. It has been shown that glass fighting, the density of which is lower than the density of traditional aggregates, can serve as an excellent raw material as a concrete aggregate and contribute to reducing the cost of extracting natural resources and energy for their processing.
Keywords: glass, glass concrete, glass waste, aggregate, properties
DEVELOPMENT OF SELF-COMPACTING CONCRETE
FOR SMALL ARCHITECTURAL FORMS
Authors: D.S. Gorodnichev, Y.Y. Kuryatnikov
Abstract: The article presents the results of experimental studies on the development of self-compacting concrete. The developed self-compacting concretes in combination with high-quality lubrication make it possible to solve the problems of manufacturing products with a high surface category (A1, A2) without additional finishing, reducing the complexity of molding.
Keywords: self-compacting concrete, micro-filler, quartz flour, small architectural forms
DIVISION OF UNCLAIMED LAND SHARES
FROM COMMON SHARED PROPERTY LAND
Authors: Stepanova, O.E. Lazarev, N.M. Bobrova
Abstract: Each subject of the Russian Federation is interested in including unclaimed land shares in civil circulation, primarily because of the increase in land tax. The article considers the process of registration of unclaimed land shares, which in practice turns out to be difficult and problematic. The passage of state cadastral registration and state registration of rights in the Unified State Register of Real Estate according to the documents prepared by the cadastral engineer is also a rather lengthy process. This process is accompanied by suspensions that occur at the decision of the state registrar due to numerous reasons.
Keywords: land plot, unclaimed land share, municipal property, land survey project, land survey plan, state cadastral registration, registration of rights, Rosreestr
INCREASING THE EFFICIENCY
OF ROAD AND AIRFIELDS IN THE ARCTIC ZONE
Authors: V.I. Trofimov
Abstract: The article has an analysis of the used concrete reinforcement methods to increase the efficiency of road and airfields in case of use in complex natural-climatic construction conditions. It is proposed to perform combined reinforcement to strengthen the road concrete slab – continuous and dispersed polymer composite nets of various lengths. The results of the testing of model samples reinforced with continuous grids and microdents are given, which prove the effectiveness of the proposed method of increasing the operational reliability of road and airfields.
Keywords: road stove, strength, construction, continuous and dispersed reinforcement
PROBLEMS OF METROLOGICAL SUPPORT
OF THERMAL IMAGING DIAGNOSTICS
OF OVERHEAD POWER LINES
Authors: N.I. Ivanova, A.D. Dementyev, G.G. Valieva
Abstract: This article discusses the main problems of metrological support for such a method of non-destructive diagnostics of the state of overhead power lines as thermal imaging control. Information is provided on the classification and devices recorded in the regulatory and technological documentation and used in thermal imaging diagnostics. The main aspects of metrological support of thermal imaging equipment are considered. The ways of solving the indicated problems are presented.
Keywords: overhead power transmission lines, remote control methods, thermal imaging control, metrological support
DEVELOPMENT OF HEAT-RESISTANT CONCRETE
FOR FOUNDATIONS OF ELECTROTECHNOLOGICAL INSTALLATIONS
Authors: Y.Y. Kuryatnikov
Abstract: The article presents the results of experimental studies on the development of heat-resistant concrete, which can be used for the foundations of industrial electrotechnological installations: electric furnaces and electric heating installations, electric welding installations of all types, installations for dimensional electrophysical and electrochemical processing of metals.
Keywords: heat-resistant concrete, electrotechnological installations, concrete compo-sition
LAWS OF THERMAL RADIATION OF GAS VOLUMES
AND FUNDAMENTAL LAWS OF PHYSICS
Authors: A.N. Makarov
Abstract: The article presents calculations according to a technique developed on the basis of the laws of thermal radiation of gas volumes. These calculations made it possible for the first time to obtain information on the distribution of thermal radiation fluxes of the torch over the surface of the flame tube, burner device. The fundamental laws of physics, in particular the laws of thermal radiation of gas volumes, are considered.
Keywords: laws of physics, heat transfer, thermal radiation, torch, combustion chamber
IMPROVING ENERGY EFFICIENCY IN THE HIGHWAY LIGHTING SYSTEM
Authors: T.Sh. Khavazov, A.V. Krupnov
Abstract: This article presents and discusses ways to improve the energy efficiency of lighting transport roads. The expected assessment of energy saving as a result of the transition to LED lamps, the use of individual dimming is given. The question of the effect of dimmers on the quality of electricity is touched upon.
Keywords: dimming, energy saving, energy efficiency, lighting of transport roads, electricity quality, LED lamps
ABOUT OF THE ELECTRICAL CONDUCTIVITY
OF THE PRECIPITATION IN TVER DURING 2016–2021 YEARS
Authors: F.V. Kachanovsky
Abstract: Analysis had made of the precipitation′s electrical conductivity (atmospheric precipitation had fallen in Tver in 2016–2021 years). Time series models of the electrical conductivity were examined. Qubic model has considered as adequate.
Keywords: conductivity, acidity, acid rain, precipitation, model, time series, trend, cycle component, seasonal component, correlation
THE EFFECTIVENESS OF NEW GENERATION SUPERPLASTICIZERS
BASED ON CARBOXYLATE ESTERS
Authors: Y.Y. Kuryatnikov
Abstract: The article presents the results of experimental studies to determine the effectiveness of superplasticizers based on polycarboxylate esters, the mechanisms of their action are given. Of the studied additives, SikaPlast E4 is the most versatile for commercial concrete mixes, as it allows for high preservation, high early strength, and is also economically justified.
Keywords: superplasticizer, mechanism of action, polycarboxylate ether, water-reducing effect