The article presents theoretical studies of the effect of various plasticizers on the mechanical properties of epoxy compositions. Based on this, the method of plasticization of the epoxy polymer ED-22 was chosen using the introduction of modified epoxy resin UP-563, which differs from the previously used modified compositions for repairing automotive vehicles in the field the simplicity of the availability of modifications in the field and as providing the widest range of changes in the properties of the epoxy composition for USAGE field. The scientific novelty lies in the justification for the creation of a new repair composition consisting of ED-22 epoxy-diane resin modified by UP-563 laproxil for the repair of hull and capacitive parts of automotive equipment in the field, which has increased vibration resistance. frost resistance and impact resistance.

Keywords: epoxy composition, epoxy resin, restoration, automotive engineering, body part, chemical modification, oligomer, polymer

The paper presents the research results of the influence of materials, which change a phase on the exterior surface of the outer shell, on forming of the heat flow mean value for one year, calculated on change of the exterior temperature per every three hours. The correlation between heat flow and characteristics of the phase-change material was studied. Such materials increase heat lag of the outer shell and allow reducing the amount of electric energy required to keeping of indoor climate. The paper presents the research results of the influence of materials, which change a phase on the exterior surface of the outer shell, on forming of the heat flow mean value for one year, calculated on change of the exterior temperature per every three hours. The correlation between heat flow and characteristics of the phase-change material was studied. Such materials increase heat lag of the outer shell and allow reducing the amount of electric energy required to keeping of indoor climate. Based on the implementation of the method of math planning of experiments the sufficient math model of the dependence of the heat flow density on the material coating thickness, latent heat of transition, heating capacity value and thermal conductivity before and after phase change was made. The mathematical model coefficients were interpreted and best values of very factors based on desirability function were determined. Based on these data the selection of the material with phase-change temperature of about 0 0C for Krasnoyarsk was made.

Keywords: energy efficiency, heat flow, heat saving, heat-storing material, phase-change heat storing, phase-change material

Today in Russia there is an acute problem of processing of waste of the logging and wood processing industry. At almost all stages of timber production, waste is generated, which is disposed of or left to rot. Felling residues obtained in the process of cutting operations are used least of all. Currently, loggers leave up to 30 % of only the stem of trees, primarily low-quality wood, not to mention twigs, conifers, stumps, while logging waste is a valuable raw material that can and should be used for further processing. The article discusses the prospects for the development of the timber industry, including related to the rational use of wood resources. A number of experiments were carried out in order to determine the influence of design and technological parameters of knife equipment on the quality indicators of wood-fiber semi-finished product.

Keywords: insulation material, finishing material, grinding, wood fiber semi-finished product, cutting waste, integrated use of wood, grinding machine

The use of polymer concrete sleepers based on rubber concrete (RubCon®) with non-metallic composite reinforcement and the method of manufacturing such sleepers are described.

Keywords: sleepers, polymer concrete, rubber concrete, composites, reinforcement, manufacturing methods

The article presents the results of the development of wooden building blocks that allow to saturate the room air with phytoncides of Siberian and other species of wood and plants. Shows the fundamental design of the blocks, the features of its production and processing. An example of the positive effect of essential oils on the reduction of bacterial air pollution is given. Buildings and structures of the proposed unit are quickly built without the use of specialized equipment. The construction and reconstruction of such a structure can be more effective in terms of both labor costs and terms of work, in comparison with traditional construction practices. Production of buildings from the offered blocks opens prospects of low-cost construction of low-rise constructions, both residential, and industrial use.

Keywords: wood building material, environmental friendly, wood processing, resin, essential oil, extract

The main features of the technology of continuous basalt fiber production at the «NPO Vulkan» (LLC, Perm, Russia) are given. As raw materials the study has been used CEM I 42,5 N (activity 45,1 MPa), natural sand with a fineness modulus of 2.3, gravel of dense gabbro-igneous rocks (size up to 20 mm), basalt fiber length of 6 mm and diameter 11 microns production "NPO Vulcan" (LLC, Perm, Russia). The results of determining the ultimate strength in compression and bending of fine-grained and heavy concrete without the addition of basalt fiber (control composition) and with the addition of fiber 0.1-0.9% by weight of cement are described. It is shown that the optimal limits of the introduction of fiber into the mixture of sand concrete can be considered 0.1-0.2% by weight of cement, which leads to an increase in compressive strength up to 70% and bending strength up to 35%. A further increase in the fiber content to 0.9% leads to a decrease in compressive strength to 27% compared to the control values.

Keywords: basalt fiber, sand concrete, heavy-weight concrete, fiber concrete, continuous fiber, optimization, disperse reinforcement

The possibility of reducing the excessive strength of self-compacting high-strength concrete for use in general construction was investigated. As a cement for such concrete, a cement-ash binder was studied, part of which was replaced by an inert mineral additive - microquatz, obtained by grinding quartz sand. It was established that the studied additive at a dosage of up to 30% does not allow to reduce the strength of concrete to the values ​​characteristic of general purpose concrete. It has been experimentally shown that the replacement of a part of the binder with microquartz does not significantly affect the initial modulus of elasticity, but significantly reduces the fast-flowing creep

Keywords: high-strength self-compacting concrete, cement-ash binder, inert mineral additive, microquartz, strength, modulus of elasticity, fast-flowing creep

In this paper, research on the development of methods for the production of thermoplastic elastomers for construction purposes based on styrene-butadiene-styrene rubber filled with expanded perlite, studied the performance characteristics of these materials. Various methods for the modification of thermoplastic elastomers, their processing modes and methods of controlling their properties are considered.

Keywords: thermoplastic elastomers, expanded perlite, production methods, material characteristics, density, physical and mechanical properties

In the production of construction lime, only a small part of the extracted raw material is suitable for the production of a quality product, while most of the production volume passes into the category of substandard raw materials. The authors of this article developed a project for the processing of carbonate-containing raw materials to produce lime for construction purposes. It is shown that despite the high level of risks and significant financial investments necessary for the organization of new production, the economic efficiency of such a project is obvious, since the costs of eliminating potential environmental disasters greatly exceed the costs of construction of the processing complex.

Keywords: construction lime, sedimentary rock, carbonate-containing raw materials, dump, aerated concrete autoclave hardening, energy efficiency, risk, environmental disaster

The introduction of RPP to 3% by weight of the dry concrete mixture is accompanied by a decrease in the compressive strength of fine-grained concrete aged from 28 days to 37%, and after 75 cycles of freezing and thawing - up to 46%. The decrease in tensile strength in bending at the age of 28 days was 25%, after 75 cycles - up to 23%. The dependence of the initial modulus of elasticity of concrete on the compressive strength remains virtually unchanged after 75 cycles of freezing and thawing. The dependence of the adhesion of MZB to the concrete base with increasing dosage of RPP is ambiguous. The maximum increase in adhesion to the concrete base after 28 days of curing in NU and after 75 cycles of freezing and thawing was 26%. An increase in RPP dosage to 3% leads to a decrease in the initial elastic modulus of MZB to 26% after 28 days of curing in NU and to 32% after 75 cycles of freezing and thawing.

Keywords: dry building mixes, redispersible polymer powders, adhesion to the base, elastic modulus, tensile strength, freezing and thawing cycles

The authors of this article considered some aspects related to the history, manufacture and operation of temporary public pneumatic structures in an urban environment. In recent years, pneumatic structures have been used quite often and successfully as multipurpose portable temporary structures for public use. They are an excellent alternative to traditional capital structures made of steel, concrete, bricks. The authors showed design differences and features of air-supported and air-inflatable buildings, described in detail the areas of their application, advantages and disadvantages. This article discusses the characteristics of the material used for coating pneumatic structures, modern innovative trends in the production of multilayer composite membranes. The authors of this article conclude about the possibility of expanding the use of pneumatic structures instead of traditional portable temporary public buildings.

Keywords: air support building, temporary structure, pneumatic structure, membrane, dome, inflatable structure, temporary structure, mobile structure, composite material, long-span structure, multi-purpose space

The problems of radiation hazard of nuclear medical facilities taking into account all stages of the life cycle are Considered. Substantiates the important role of the concrete biological shielding to ensure radiation and environmental safety of staff, patients, the public and the environment. The necessity of optimization of a choice of concrete biological shielding for radiation parameters. To justify the need and the possibility of optimizing the choice of the concrete biological shield, the results of computational studies of the activation characteristics of the three formulations of protective concrete, widely used for the construction of the canyons biological shielding of medical cyclotrons. The possibility of reducing the volumes of radioactive waste and their categories at the decommissioning stage is shown, which will ensure the reduction of financial costs for the disposal of radioactive waste during biological shielding dismantling. Scheduled tasks for further research.

Keywords: nuclear medicine, cyclotron, shielding concrete, induced activity, chemical composition, optimization, radioactive waste, life cycle, decommissioning

The composition of fine-grained fiber-reinforced concrete using Portland cement, stone crushing waste, volcanic ash and basalt fiber are considered. It was revealed that with an increase in the ash content in cement, the compressive and flexural strength of fine-grained concrete decreases, and the water absorption increases. Without a significant reduction in the properties of fine concrete, you can enter no more than 10% of volcanic ash.It has been established that with an increase in the content of large fractions of aggregate, the compressive and flexural strength of fine-grained concrete increases as a result of a more compact arrangement of sand grains. The increase in the content of fine sand fractions reduces the strength characteristics of concrete, and increases water absorption. The dependence of the properties of fine-grained fiber-reinforced concrete on the method of mixing the mixture and molding products

Keywords: portland cement, stone-breaking wastes, volcanic ash, basalt fiber, grain size distribution, fine-grained fiber-reinforced concrete, bending strength and compression, method of mixture preparation, method of molding products

The task of identifying the properties of concrete and the location of damage in the layout structures of the beam type based on the application of experimental vibration analysis is considered. As a simple analysis model, beam constructions are defect-free and with defects. Based on the experimental approach, the model oscillations with shock and vibration excitation are analyzed. Based on analytical modeling, the dynamic modulus of elasticity, the speed of sound in the beam, the location of the defect are calculated. A technique and an example of determining the location of a defect in beam-type structures is presented. The article was published as part of the implementation of the program of the International Forum "Victorious May 1945"

Keywords: vibration diagnostics, identification, beam type construction, defect, experimental approach, analytical modeling, vibration excitation

The possibility of using an effective insulation of rigid slabs of non-combustible basalt insulation ROCKWOOL not only to ensure the thermal properties of the outer walls, but also to improve the plasticity of the facades of buildings, due to the device protruding on the facade of vertical pilasters, horizontal belts, volumetric geometric patterns using the facade system ROCKFACADE. According to the results of the study on this topic, the conclusions are given.

Keywords: effective insulation, non-combustible mineral wool ROCKWOOL insulation, outer wall, plastic, building facade, pilasters, belt, ROCKFACADE

The results of the investigation of the structure of the concrete, modified by the additive expanding, on the combined aggregate, which is a natural crushed stone mixed with crushed concrete, are presented. The study of the properties and regularities of the formation of the concrete structure is simultaneously a method of controlling their production. Regularities and reasons for the change (decrease) in the quality indices of concretes with a combined aggregate are established. Investigation and normalization of the properties of concretes on combined aggregates will allow using them along with traditional structural concrete.

Keywords: recycling, combined filler, contact area, structure, defects, durability

By centrifuging it is possible to manufacture a wide range of building structures and products from reinforced concrete. Such products have several advantages, being relevant in modern construction, however, it requires careful compliance and quality control of the process. The frost resistance of concrete is one of the main indicators characterizing the durability of such building structures as reinforced concrete pillars of power transmission lines and contact network. The analysis of the literature and a series of experimental studies in the laboratory. The influence of the technology of manufacturing products from heavy concrete on the indicator of their cold resistance has been identified and determined.

Keywords: Racks of power transmission poles, racks of supports of the contact network, centrifugation, vibrating, frost resistance, heterogeneity of concrete, variotropy

The article is devoted to the analysis of the effectiveness of the use of pre-stressed reinforcement in reinforced concrete structures and the use of steel-fiber-reinforced concrete in modern construction. Examples of materials used

Keywords: reinforced concrete, prestressed reinforcement, strength, high-strength reinforced concrete, steel fiber concrete, fiber, reinforcement

The experience of using blast furnace slag as an artificial foundation of the building foundation is considered. In the process of construction and installation works, the displacement of the columnar foundations was revealed due to changes in the initial properties of the blast-furnace slag. The chemical composition of the slag belonged to the group of inert materials. In fact, after layer-by-layer compaction, the process of disintegration of its initial properties began. The analysis of the conducted studies showed that in the regulatory and scientific literature there are no unambiguous recommendations on the use of this material as the base of buildings and structures. The recommendations that are available relate exclusively to its use in road foundations. From experience it follows: the use of slag in construction is possible, subject to confirmation of its compliance with specific construction conditions.

Keywords: blast-furnace slag, artificial base, layer-by-layer compaction of the soil, hydraulic activity and inertness, modulus of basicity, calcium oxides, manganese oxides, particle size distribution, inert material, chemical decomposition

Today, the development and research of new designs requires a systematic approach, including design, manufacture of products and construction. Further development of construction follows the path of improving the designs and forms of buildings, which is facilitated by the improvement of the physical and mechanical properties of building materials. The use of high-strength concrete and steel leads to the creation of lighter thin-walled reinforced concrete structures and is fundamentally possible only with perfect technology for the manufacture of elements. Since in the manufacture of reinforced concrete products by a centrifugal method, radially directed filtration channels are formed, it is in them that the manifestation of destruction is most likely. It is aggravated by the fact that the inner layer of such products is more porous than other layers of concrete. The presence of such a structure is determined even if all the requirements for the quality of the raw materials, the preparation of the concrete mix and the use of optimal centrifugation modes are met. The authors in the process of confirming the working hypothesis in this study developed a method of introducing aggregate during centrifugation, on the basis of which prototypes were obtained, which are characterized, compared with the control, improved physicomechanical and structural properties; an increase in the carrying capacity of centrifuged reinforced concrete columns of annular cross section was achieved at the stage of their manufacture by changing the nature of the manufacturing process from one stage to two stages. Testing the hypothesis was carried out by the determined increments of the structural and physical characteristics of the concrete samples. The density of concrete prototypes of centrifuged reinforced concrete columns of annular section of two-stage molding with all three ratios of fractions was higher than that of single-stage concrete. Water absorption at concrete capillary suction of prototypes of centrifuged reinforced concrete columns of annular section of two-stage molding with all three fractions ratios was lower than that of single-stage concrete.

Keywords: centrifuged concrete, reinforced concrete columns, aggregate fractions, two-stage technology, annular section, density, water absorption, structural and physical properties

The article presents the method of appointment of the composition of the molding mixture, which is based on the calculation and experimental approach. The results of the research served as the basis for the practical implementation of the proposed technological method of increasing the durability of small-sized products made of fine concrete. The article was published in the framework of the program of the International Forum "Victorious may 1945»

Keywords: workability of concrete mix, water-cement ratio, grain composition, raw materials, concrete, acidic medium, sodium sulfate, durability, small products, classification of defects, vibration mixing, technological methods

Ventilated facades are becoming quite common in Europe and around the world. This type of facade provides good thermal comfort in the room. This article describes the main trends of the development of modern facades. The authors look at the numerous advantages of ventilated facades and their varieties with a double chamber (also named multiple-skin façade) in front of traditional massive facades. There is a wide variety of concepts of facades that provide ample opportunities for the work of architects of various schools and directions. The article argues that the design strategies for ventilated facades should adapt to climatic conditions and take into account local features, such as average annual temperature and its extreme values, solar radiation, humidity levels, in order to minimize building loads and energy consumption. The use of double ventilated facades in the construction of new ones and the re-lining of previously constructed buildings with them contribute to the improvement of the ecological characteristics of the urban environment.

Keywords: ventilated facade, ventilated facade device, internal climate, sound insulation, thermal insulation, facade, facade profiles, double ventilated facade, energy efficiency

The actual problem of modern construction is considered - the expansion of resource-saving technologies. The use of dispersed reinforcement of cellular concrete allows to improve its strength characteristics, reduce the consumption of cement, one of the most expensive components of the concrete mix. When reinforcing cellular concrete with synthetic fibers, it is possible to obtain products with a lower density without reducing the strength characteristics.

Keywords: resource-saving technologies, aerated concrete, monolithic construction, dispersed reinforcement, fiberglass, thermal resistance, external walling

The influence of grain composition and active mineral addition of microsilicasuspension on properties of dry concrete mix was considered. The selection of the method of production of paving slabs with allowance for technological modes of vibropressing technology was made. The optimum dose of microsilicasuspension, having positive effect on the concrete quality, was defined.

Keywords: grain composition, dry mix, process of hydration, microsilica, paving slabs, heavy concrete, compressive breaking strength, abrasion capacity

The factors that must be taken in the selection of lightweight concrete composition with the use of granulated foam glass (GFG-concrete). In addition, the effect of the composition of concrete mixture on the physical, mechanical and thermal properties of the obtained material is shown. Portland cement CEM II / A-S-32,5 B, produced by PAO «Gornozavodskcement», was used as a binder when selecting the composition of GFG-concrete; quartz sand of the Zaostrovsky opencast mine of Perm with a particle size module of 1.96 was used as fine aggregate; granulated foam glass of fractional composition of 5-10 and 10-20 mm was used as a coarse aggregate. Determination of physical, mechanical and thermal properties of GFG-concrete was carried out according to standard methods. The obtained mathematical models allowed us to establish a functional relationship between technological factors of variation (content of granulated foam glass and water-cement ratio) and output optimization parameters (average density and compressive strength). The highest compressive strength (9,0-10,93 MPa) of HPS-concrete was obtained with a content of coarse aggregate of 20-40% and a water-cement ratio of 0,4-0,6. The average density does not exceed 1500 kg / m3, and thermal conductivity varies from 0,207 to 0,375 W/m⸱K. The optimal composition is the content of GFG from 20 to 40% and water-cement ratio of 0,4-0,6. Research have also shown that by changing technological factors, it is possible to obtain GFG-concrete with a density class D500-D1500.

Keywords: water-cement ratio, granulated foam glass, lightweight concrete, mathematical experiment planning, response surface, compressive strength, average density, regression equation