Increasingly the non-autoclaved aerated concrete quality is created at of mortar mix expansion and the stage of plastic strength set. Consequently, the structure formation process can be deliberately controlled. The control actions choice is a complex scientific and technical challenge. It is solved in different ways in modern practice. The authors propose an integrated approach for selection of control actions in this article. In the first stage it is proposed to use expert methods, for example, the method of a priori ranking factors. It is rational to apply experimental study in the second stage. The article presents the choice of the control parameters vector in controlling the non-autoclaved aerated concrete structure formation as an example.

Keywords: non-autoclaved aerated concrete, production technological process, control, factor, quality, expert method, method of a priori ranking factors, experiment, integrated approach

In this article, problems of safety of the exploited structures of the contact network are examined. The types of contact network supports used in the construction of these structures are considered. The features of the centrifuged concrete structure formation, the reasons for the heterogeneity of the structure along the thickness of the annular section and the appearance of cracks are analyzed. There is a physical model, the use of which will allow to modify the structure along the thickness of the annular section due to directed structure formation in the process of concrete with a combined aggregate and fibrous components centrifugal compaction.

Keywords: safety of structures, contact network supports, centrifuged structures, annular cross-section, physical model of the process of compaction of concrete mixture during centrifugation, concrete with combined aggregate and fibrous component

In the article the results of the analysis of the main factors affecting the wear mechanism of asphalt concrete pavements are given attention to the properties of the stone material and the binder. The questions of the influence of dust formed as a result of deterioration of coatings on the environment are considered.

Keywords: asphaltic concrete, road surface, environment, wear products, wear resistance, wear factors

Are represented the results of studies on the development of teploognezashchitnykh composition cement solution mixtures on the distended vermiculite and the pumice with the application of a multifunctional additive D -5. Are proposed the compositions of teploognezashchitnykh composition mortars, which 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 and to improve the characteristics of solution. The replacement of the fine dispersed fraction of the distended vermiculite d0,63 mm does not produce by pumice by the volume in the solution mixtures a noticeable increase in solution density, in this case their strength characteristics grow. The developed composition solution mixtures correspond to requirements ALL-UNION STATE STAN. 28013–98 and have low prime cost due to the use of the pumice

Keywords: portland cement, the distended vermiculite, pumice, additive D -5, teploognezashchitnyy composition solution, transverse strength and compression, the mobility of mixture, exfoliation property, the density

Results of researches of a ceramic brick are presented. Durability of a brick makes: at compression – more than 10 N/mm2, at a bend – more than 3 N/mm2, water absorption of 10,3%. According to the obtained data the brick conforms to requirements of standards of the Russian Federation. The hypothesis of peeling of a front layer of a brick because of low frost resistance is offered. By results of a X-ray phase research minerals have been identified: quartz, white mica, hydrowhite mica, illit, calcite; existence in a ceramic brick of minerals sillimante and mullite as a result of the phase analysis isn't revealed. Results of the phase analysis are confirmed by data of the thermal analysis. The received results allow to approve about insufficient for formation of minerals sillimante and mullite to temperature of roasting of a ceramic brick. It has exerted impact on decrease in its durability in the conditions of sign-variable temperatures (low frost resistance).

Keywords: face brick, research, brickwork, peel, defect, strength, frost resistance, water absorption, test, mineral

The article deals with the characteristics of hydrophobic swollen perlite and methods of its research. The perspective of the use of expanded perlite in various industries is described. Possibilities of application of these materials in practical use are shown.

Keywords: composite materials, energy saving, modification of perlite, hydrophobic perlite, methods for improving properties

The processes of formation of mineral foams with respect to the technology of cellular heat-resistant materials have been studied. The reasons for the degradation of the quality of the foam when it is filled with aluminate cement particles have been established, and methods have been proposed that prevent the rapid destruction of three-phase foams

Keywords: Three-phase foams, stability, control actions, structure-forming processes, cellular construction materials, heat-resistant concrete

The description of modern technologies for the protection, repair, reconstruction of chimney and ventilation ducts method of mounting a thermoplastic polymer tube Furanflex. A detailed description and analysis of the advantages and disadvantages of this technology. The technique of eliminating the problem of chimney destruction due to the impact of condensate is presented. A brief review of the existing alternative methods of protection and repair of chimneys. The advantages and disadvantages of these alternatives methods are briefly described. Data and conclusions of the presented work may be interesting for the widest circle of readers, builders, architects, owners of cottages . The article may be of interest to those who are just planning to start building their own homes, as well as managing utility companies on the balance of which is the old houses

Keywords: chimney, ventilation duct, corrosion, repair, restoration of the chimney, condensate,protection of the chimney, lining, furanflex, thermoplastic liner

The article presents the description of the creation of modern multitube designs of industrial pipes using the self-supporting thermoplastic polymer pipe Furanflex.The variant of the device of separate gas-exhaust trunk at reconstruction of boiler rooms and CHP by the heat-generating companies is offered. There is a specific example which gives description of technology the installation of industrial pipes Furanflex .The detailed description and the analysis of advantages and disadvantages of this technology by means of which it is possible to get rid of a problem of destruction of a chimney owing to influence of condensate is given forever. The article provides a brief overview of the existing alternative methods of protection and repair of chimneys with a brief description of the advantages and disadvantages.Data and conclusions of the presented work maybe interesting for different circle of readers, builders, designers-designers, architects.This article should be of interest to the heat-generating companies

Keywords: chimney, ventilation duct, corrosion, repair, restoration of the chimney, condensate,protection of the chimney, lining, furanflex, thermoplastic liner,corrosion, pipe repair, multitube designs of industrial pipes

The article presents a technique for designing and assigning the composition of the molding mixture, which is based on the calculation and experimental approach to determining the composition, taking into account the quality of raw materials used and the requirements for the properties of concrete products produced.

Keywords: Hard pressed concrete, cement, water content of the mixture, two-factor experiment, rotatable composite simplexummable plan, regression equation of the experiment, quasi-factor analysis

Stages of receiving samples of high-austenitic powder steel 110G13P a method of dynamic hot pressing are presented. Processes of formation of structure and properties of steklosoderzhashchy powder steel 110G13P are considered. Significant positive effect on formation of structure of powder steel 110G13P with application glass components is defined.

Keywords: high-austenitic powder steel, method of dynamic hot pressing, agglomeration, mechanical activation of furnace charge, oxidic films

The paper considers the issue of the reduction of radon daughter products exhalation from construction materials into the indoor air of residential buildings. The characteristics of materials obtained through the use of radiation technologies are given.

Keywords: radon, exhalation, equivalent dose, volume activity, radon emanation, penetration, polymers, construction materials, gamma background, radon, radionuclides, alpha particles

In many industries, production processes are connected with acidic wet-gas environments. These environments adversely affect building structures. The author suggests a light polymer-silicate schungisite concrete as a corrosion-resistant material of external walls. The use of this material will increase the service life of the walls of enterprises in a number of industries, where building structures are exposed to corrosive environments. Acid-resistant schungite and schungisite components were used in the material. The article presents the results of studies of the sorption humidity of a light polymer-silicate schungisite concrete. Sorption humidity was studied as a property that actively influences the energy efficiency and durability of external walls. It was concluded that the most favorable conditions for the work of the material from the point of view of its sorption-wetting are created at a relative humidity of air not exceeding 80%. The internal environment with relative humidity of air close to 90% can cause a sharp moistening of the material with sorption moisture.

Keywords: durability, energy efficiency, sorption humidity, acidic wet-gas environments, exterior walls, corrosion protection, polymer- silicate, shungite, shungisite,light polymer-silicate concrete

"n this article, the influence of the physical state of chemical additives at the moment of their introduction into a gas-concrete mixture on the kinetics of gas evolution and the gas diffusion coefficient is considered. To test the working hypothesis, two compounds were designed and manufactured. As a part of С№1 chemical additives were entered in the form of a colloidal solution. A comparative analysis of the results of physical and mechanical tests of the aerated concrete samples of the tested compositions showed that the introduction of chemical additives in the form of a colloidal solution lowers the average density in the dry state due to a more intensive course of the gas evolution reaction without significantly reducing the compressive strength. At the same time, the average density increases in the composition of CN2.

Keywords: kinetics of gas evolution, gas diffusion coefficient, aerated concrete mixture, reactivity, expansion of aerated concrete mixture, colloidal solution

This article considers the effect of the introduction of a partially hydrated aerated concrete mixture on the intensity of gas evolution, the reactivity of a disperse gas generator, and the physical and mechanical properties of aerated concrete. To test the working hypothesis, two compounds were designed and manufactured. The pure dispersed gas generator was introduced into composition C№1, and a mixture of a gas generator with a partially hydrated gas-concrete mixture was introduced into the composition C№2. A comparative analysis of the results of physical and mechanical tests of the aerated concrete samples of the tested compositions showed that its introduction increases the compressive strength, while reducing the density of aerated concrete. At the same time in the composition of С№1 there is a higher density and a drop in strength

Keywords: Partially hydrated mixture, gas generator, aluminum powder PAP-1, reactivity, device PGV-2, kinetics of gas evolution, average density in the dry state, compressive strength

The article considers the topicality of the development of cement foam concrete meeting modern requirements for energy saving and energy efficiency. The interrelation of physical and mechanical properties of cement foam concrete with the features of its structure formation at macro- and microlevel is considered. The main components for the manufacture of structural and heat-insulating cement foam concrete are described. The results of experiments on the determination of the dependence of the parameters of the structure of a foam concrete mixture, which form the physical and mechanical properties of finished products, are presented. A mechanism has been established for the active participation of particles of fibrous cellulose filler in the organization of the structure of a foam concrete mix and samples based on it. The optimal concentration of fibrous cellulose filler in the raw meal mix was confirmed.

Keywords: structural and heat-insulating foam concrete, modifying additives, technical carbon, fibrous filler

In this article, the problem of the application of high-strength steel reinforcement in flexible compressed reinforced concrete elements is considered. Conditions are considered for establishing the minimum necessary proportion of prestressed reinforcement in flexible columns with pre-stretched reinforcement with mixed reinforcement.

Keywords: concrete, reinforced concrete, structures, technologies, installation, reinforced concrete structures, tension, prestress, beams, reinforcement, efficiency

This article deals with the field of application of fiber-reinforced concrete, reveals the advantage of using fiber-reinforced concrete in comparison with conventional concrete. The efficiency analysis of the use of fiber-reinforced concrete is analyzed.

Keywords: fiber concrete, concrete, reinforced concrete, structures, technologies, installation, fiberglass concrete, reinforced concrete structures, tension, prestress, basalt fiber concrete

In this article, we consider ways to restore the operational reliability of reinforced concrete structures, the types of spacers, the method of reinforcing a reinforced concrete column with semi-circular steel sheets. The reinforcement of the elements by the biaxial transverse compression of concrete is also considered.

Keywords: concrete, reliability, reinforced concrete, structures, technologies, installation, reinforced concrete structures, struts, prestressing, columns, reinforcement, bearing capacity, reinforcement.

This article deals with the introduction of reinforced concrete structures with a variable pre-stress combined along the span. The identification of economic efficiency from replacement of reinforcement and prestressing is carried out.

Keywords: concrete, reinforced concrete, structures, technologies, installation, reinforced concrete structures, tension, prestress, beams, reinforcement, efficiency

the introduction of fibers in the composite leads to a change of the structure, properties and manufacturing technology of the material. This paper presents method of calculation of the compositions disperse-reinforced sulfur materials. Presents formulas to determine the total surface of the filler particles and fibers; surface, number and volume of fibres; the reinforcement ratio; the volume fraction of the filler; mass of sulphur, filler, fibres and modifiers

Keywords: designing, sulfur, sulfur concrete, sulfur cement, dispersion-reinforced material, composite, filler, fiber, optimization of the composition, volume fraction, the reinforcement ratio, density, structure

The results of the laboratory studies to determine the suitability of clay raw materials Sukho-Chaltyrskoe field for production of ceramic brick by the method of plastic molding. It is established that the introduction of the composition of the batch burnt mine rocks as emaciated additives and ash as a fuel-containing, as well as in the processing of faces with a special solution, it is possible to obtain ceramic samples that meet the requirements of GOST.

Keywords: clay raw materials, plastic molding, ceramic brick, emaciated additive, frost resistance

The results of a patent search in the direction of improving the design of crushing equipment are presented and a modernization option is proposed. Optimization of the parameters of the jaw crusher will prolong the service life, simplify the maintenance and repair processes, improve the quality of the secondary aggregate

Keywords: crushing, jaw crusher, aggregate of crushed concrete, modernization, optimization, lining, service life, reliability

In the article the choice of the type of thermal insulation of the isothermal van is substantiated. We consider polyurethane foam, expanded polystyrene and liquid heat insulation. Materials are compared by the amount of heat losses, the thickness of the insulated layer and the cost of the device.

Keywords: isothermal van, heat insulating material, polyurethane foam, expanded polystyrene, liquid heat insulation, heat losses

Investigations were conducted to assess the corrosion resistance of stabilized sandy loam soil with ground granulated slags in organic media: mineral oil, gasoline and diesel fuel. A model is proposed for an accelerated study of the corrosion resistance of concretes and other building materials under the conditions of the dynamic effect of the medium under investigation on the test material. The obtained results of X-ray phase analysis of samples and electron microscopic studies suggest that as a result of hydration of minerals of ground slag and ground, low-base CSH (B) hydrosilicates are formed, the sizes of new formations and inclusions on ETF slag are less than on CMP slag.

Keywords: ground granulated slags, low-basic formations, corrosion resistance, slag-alkali binder, oil, porosity, dynamic model