The paper presents the results of a study of the physico-mechanical properties of the granular colorless binder "Recofal" and polymer concrete prepared on its basis.

Keywords: Colored polymer concrete, granular binder "Recofal", physical and mechanical properties, polymers, pigments

The deformation model is considered in relation to the bending elements most characteristic of partially prestressed reinforced concrete structures. The bearing capacity and deformability of partially prestressed structures are investigated. Given the criteria of strength of compressed concrete that meets the attainment of the ultimate strain in the compressed concrete, as well as stretched in the longitudinal reinforcement, characterized by the achievement of the ultimate strain either in stressed or non-stressed reinforcement. The analysis of the calculation results of the strength and deformability of partially prestressed structures under short-term and long-term effects of the load on the deformation model and the norms. It is shown that the deformation model accurately estimates partially prestressed reinforced concrete elements with different types of loading for any combination of tensioned and non-tensioned reinforcement by strength and deformation.

Keywords: partially prestressed elements, deformability, strength, non-stressed reinforcement, state diagrams, deformation model

The results of studies on the development of composition gypsum solution mixtures on the pumice with the application of a multifunctional additive D, are represented. Are proposed the compositions of mortars on composition gypsum that binding and ashes, that make it possible to substantially improve the physicomechanical properties of solution mixtures and solution. The introduction of multifunctional additive D -5 to solution mixtures makes it possible to improve the properties of composition solution mixtures. The developed composition gypsum solution mixtures correspond to requirements ALL-UNION STATE STAN. 28013–98 and have low prime cost due to the use of the pumice

Keywords: gypsum, portland cement, pumice, additive D -5, composition gypsum mix, transverse strength and compression, density, the coefficient of the softening

The article describes the chemical composition of groundwater in the Rostov area. On the basis of sanitary and environmental assessment of the chemical composition of groundwater from wells, one of the areas of the South-Eastern part of the Rostov area, which are sources of water of the Egorlykskaya station, it was found that the concentration of hydrogen sulfide exceeds the MPC by about 1000 times. Analysis of methods of water purification from hydrogen sulfide, the main of which include: oxidation with molecular chlorine, sodium hypochlorite, hydrogen peroxide, showed the advantage of using the hydrogen peroxide. A new reactor design is proposed, which allows to increase the contact time of the treated water with the oxidant by hydrogen peroxide without increasing the size of the structure. This allows the maximum transfer of dissolved hydrogen sulfide in the solid phase.

Keywords: groundwater; hydrogen sulfide, purification, hydrogen peroxide, chemical reactor, economic efficiency

Numerical simulation is becoming more and more widespread when solving the problems of air distribution and inflow air rate. One of the questions of using CFD approaches legitimacy is the possibility of a reliable description of the flow in modern air distribution devices. In the present work, physical and numerical experiments were carried out for the SMK 200 jet nozzle diffuser. Velocity profiles were taken at various distances from the jet nozzle during the physical experiment. Numerical investigation tool was the integrated package STAR-CCM +. Numerical simulation was carried out using various turbulence models. Simulation results showed that the use of the k-ɛ models allows to describe the parameters of the flow with sufficient accuracy. Number of cells required for the correct flow description in modern air distribution device is suitable for practical application.

Keywords: air distribution, numerical simulation, turbulence models, physical experiment, jet nozzle diffuser, STAR-CCM+

The article presents the results of the research of architectural and spatial features of the monument of historical and architectural heritage of Guinea. On the basis of the analysis of objects-analogues and architectural measurements carried out virtual reconstruction of volume-space, space-planning and constructive solutions destroyed at the present time the Palace of the ruler Samori Ture, who founded at the end of the XIX century military-strategic center-the Royal quarter of Sanancoro, which was the center of the anti-colonial struggle in Guinea.

Keywords: virtual reconstruction, architectural-spatial decision, constructions, Guinea, palace, end of XIX century

The calculation by various methods and comparison of the economic efficiency of the use of metal, reinforced concrete and pipe-concrete columns during the development of the reconstruction project of the production building are considered. A technical and economic comparison is made for the following parameters: the mass of steel and concrete; cost of basic materials; labor intensity and cost of production. Analysis of options for calculating building structures can help in choosing the way to restore the operational reliability and load-bearing capacity of reinforced concrete compressed elements.

Keywords: concrete, pipe-concrete, load-carrying capacity, I-beam column, reinforced concrete, building structures, reinforcement, constant load, strength, operational reliability, deformation

The influence of finely ground zeolite-containing rock on the properties of fine-grained concrete mixtures is considered and its interaction with cement. Defined optimal dosage of the zeolite-containing rock, which increases strength under bending and compression.

Keywords: fine-grained concrete, fine-grained concrete, zeolite-containing rock, finely ground filler, mineral additive

Some kinds of construction materials, notably rock is subjected to burning while producing construction materials. One of the materials is clay. The aim of the research is to ascertain if burning of clay rocks influences changes of specific and effective specific activity of natural radionuclides. The selected samples of clay were subjected to phasic burning. After each phase specific activities of natural radionuclides were establiched, and their effective specific activity was calculated. The undertaken research acquired data served a matter for further analysis and searching dependencies. The reserch results analysis having been made, it managed to establish, that there exists a correlation of different power degree berween burning temperature and specific activity. On the example of one of the clays researched there was drawn a polynomial regression pattern. When being aware of radiation characteristics and burning temperature of clay stock, the pattern will allow calculate radiation characteristics of the finished product. This will allow control (decrease) the radioactivity level of the finished product, i.e. ceramic materials and items.

Keywords: natural radioactivity, burning, clay rocks, radionuclide, correlation analysis, polynomial regression

The article consists of classification of results of researching industrial buiuldings of soviet period in aspect of their contemprorary condition and reconstruction to further using them as architectural skin of industrial processes

Keywords: architecture, industrial buildings, reconstruction of industrial buildings, approaches to reconstruction, system theory

The article presents an analysis of the causes of deformation of the steel tank, built on weak water-saturated highly compressible clay soils. The results of calculations of the soil base deformation and comparison with the data of geodetic observations are presented

Keywords: Foundation, steel tank, soil, hydraulic testing, deformation, inclination, settlement

It was considered the method of calculating the stability of steel spiral-bound silo wall under axisymmetric buckling under the influence of internal grain pressure is considered. The silo construction consists of short, cylindrical shells smoothed through the folds and having initial curvatures directed outwards. It was obtained the solution for determining the critical stresses of short shells.

Keywords: steel silo, spiral-bound silo wall, ax symmetric buckling, initial curvature of the shell, internal lateral pressure, elastic repelling of grain, frictional force of grain

This scientific article is focused on researching relevance of geo information system (GIS) application which is used for calculating of gas-distribution networks. The experiment has been made on laboratory stand. This stand has modeled: dead end, looped and mixed gas networks. The results was compared to other results, which were gained from program and settlement complex ZuluGaz 8.0(analogue of the stand). In this complex calculations work in close integration with geo information system and were made in the form of the expansion module of the GIS. Comparative analysis of the ZuluGas 8.0 calculation results of existing gas-distribution network, characteristics of the existing gas-distributing network and results of calculating in program complex (where initially this network has been counted) was made.

Keywords: Gas supplying, natural experiment, modeling, geographic information systems, gas distribution networks, laboratory stand

The non-continuous beam on which the concentrated masses are located on the elastic supports is subjected to seismic action as a stationary random process with latent periodicity. The eigenfrequencies of the oscillations are determined and the reliability function is found in time. The theory of emissions beyond the design resistance is used.

Keywords: Beam, concentrated mass, elastic support, correlation matrix, natural frequency, effective frequency, random process, latent periodicity, reliability, time

Technical and economic indicators of different options of structural solutions of overlappings are compared. According to the results of the calculations, the most economic profitable option is determined.

Keywords: floor, reinforced concrete, ribbed, monolithic, precast, hollow, profiled, flooring, steel concrete, consumption, reinforcement, concrete, labor input

The article considers the aspects of parametric modeling, his key features, and the question of the relevance of this direction in the design of unique buildings and structures. Are presented surfaces that have not yet acquired the mass character of design and erection, or have not been built anywhere else, but have a high potential to become in the future a great adornment of urban development. In construction, a very limited number of thin-walled structures are used: cylindrical, spherical, shallow transfer shells, conical, shells of rotation. This is only a small fraction of the existing variety of geometric shapes developed by geometers, so the parametric architecture has a great potential for application. The finite element method allows modeling objects of a parametric architecture, approximating buildings and structures with rod, plate and shell elements. The parametric architecture expands the scope of the finite element method and allows the creation of unique high-altitude and long-span buildings and structures. However, the finite element library of the software complex requires modernization and expansion to design unique surfaces of the parametric architecture.

Keywords: parametric architecture, parametric modeling and design, surface, shell, shape, curvature

The effectiveness of the use of superplasticizers of various chemical bases of the MC-Bauchemie Group: PowerFlow 7951, Muraplast FK 49 and Centrament N 10 was studied in concrete. The quantitative influence of the superplasticizer on the properties of cement binder and concrete was studied. Based on the obtained research results, we recommend the costs of additives for the production of heavy concrete.

Keywords: superplasticizer, polycarboxylate, lignosulfonate, naphthalene, heavy concrete, concrete strength, microstructure

A scheme of the HVAC system with local (zone) air handling units providing the possibility of heat and humidity treatment of air is developed to maintain the set temperature and relative humidity of the supply air. Features of regulation of moisture content of supply air in HVAC systems are considered and an analysis of air processing processes was carried out using the I-d diagram for the warm and cold periods of the year. A method for control the moisture content of the supply air is described, which allows more accurately to maintain the air parameters when the heat and humidity loads in the serviced rooms change.

Keywords: multizonal HVAC system, local (zone) air handling units, heat and moisture exchange, I-d-diagram, regulation of moisture content

The paper considers the actual problem of an assessment of mechanical characteristics of two-layer materials by nondestructive methods (a method of conical indentation). The calculation of the process of indentation into two-layer medium by the finite element method with ANSYS program. The influence of layer thickness on the parameters of the indentation is considered.

Keywords: conical indenter, nondestructive testing, mechanical properties, strength tests of metal, finite element method, hardness, surface hardening

The article deals with the method of probability calculation for seismic stability with the use of stochastic linear equation, the solution of which is carried out by the method of canonical expansion. The obtained expressions for the spectral output density and dynamic coefficient are given.

Keywords: probability calculation, the method of canonical expansions, seismicity, dynamic factor, stochastic equation

The paper discusses the contemporary technologies for making glass envelopes by way of planar glazing as part of reconstruction of buildings and facilities. It is highlighted that polyvalent multi-layer external walls are considered by many scientists as a mechanism for improving energy efficiency of façade systems. Based on the analysis of the research literature, the authors also note that spider glazing is optimal for two-layered glass envelopes, as it is suitable for use as part of reconstruction of frame and frameless buildings. Adaptive façade systems are suggested to be arranged with the use of brackets having a telescopic glass holder.

Keywords: energy efficiency, reconstruction, glass envelops, adaptive buildings, translucent façade, spider glazing, glass holder

The advantages of using polypropylene fiber in technology of geopolymer concrete were considered. It was established that the use of dispersed reinforcement makes it possible to improve the critical characteristics for this type of concrete: strength, crack resistance and shrinkage. It was shown that an important problem of using polypropylene fiber is obtaining of a homogeneous structure of concrete with fiber. The effectiveness of various ways of introducing polypropylene fiber VSM into fine grained geopolymer concrete mixture was studied. It was found that the most effective way of introducing fiber is pre-mix it with a moistened fine aggregate.

Keywords: "geopolymer, fine-grained concrete, disperse reinforcement, polypropylene fiber, mixing technology, compressive strength, flexural strength, homogeneity, granite, slag "

In the article the main technologies used in the construction of bored piles are considered and their comparative analysis is presented, as well as the optimal technology for construction in cramped conditions.

Keywords: bored piles, technology, foundation, restoration, reconstruction, Rostov-on-Don, construction

Тhe problem of application of programs is considered 4D programming in architecture, organization and technology of construction, architecture of 4D programming. Prospects for using programs based on this technology are being studied. Areas of application of innovative software in construction.

Keywords: 4D programming in architecture, organization and technology of construction, architecture 4D programming. Prospects for the use of programs are being studied.

The article deals with topical issues of mercury waste disposal. The analysis of the possibility of secondary use of demercurized cullet under the condition of maximum extraction of mercury concentrate. On the basis of physical and chemical properties of mercury, a comparison of two methods of demercurization, during which it was found that the technology of thermal demercurization will reduce the percentage of remaining mercury in cullet.

Keywords: mercury-containing waste, demercurization, cullet, fluorescent lamp, waste disposal