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

Interference of mineral fillers, phosphor and chloride contained plasticizes, bromine contained fireproofing compounds and ferrocene derivatives to thermal stability, ignitability and smoking capability of epoxy composite materials was under consideration. The authors have eliminated that the phosphate plasticizes do not affect practically to epoxy polymers' combustibility, but to reduce smoking capability of composites. Different types of mineral fillers by concentration less then 45% by mass do insignificantly affect ignitability of epoxy composites. Different types of aromatic bromine contained additive fireproofing compounds do not affect to combustibility of such composites. The ferrocene derivatives surpass the ferrocene by effectiveness of smoke redesign. Correlation of the oxygen index with limiting oxygen concentration, heat of burring and critical density of heat flow graph was shown up. The main service properties and the data of inflammability of original patented composites are presented.

Keywords: bromine contained fireproofing compound; ignitability; combustibility; smoke ability; composites; fillers; plasticizes; ferrocene derivatives; epoxy oligomers

The technology of the new generation is an injection method of polymer waterproofing. As for polymeric compositions for injection are used polyurethane compositions; materials based on epoxy tar; micro cement; acrylate gels. Acrylate gels can provide the necessary reliable, highly elastic barrier from water pressure. Reducing the cost of injection waterproofing is possible through the use of acrylate waste paintwork materials (PWM). The results of studies on the use of acrylate wastes (PWM) as a water-repellent additive to concrete, allow us to recommend identical wastes as materials for volumetric water-repellent treatment of building structures in order to reduce the cost of water resistance by injection.

Keywords: injectable waterproofing for buildings and constructions, waterproofing materials, paintwork materials, polymer wastes

The peculiarities of the activity of mobile car repair shops are considered. Mathematical models for determining indicators, taking into account the randomness of the receipt of requirements for maintenance and the duration of the services themselves, are proposed.

Keywords: mobile car repair shop, probability, criteria, complex indicator, efficiency

The use of sunflower husk waste allows to solve the problem of utilization of agricultural waste and obtaining adsorbents for wastewater treatment of industrial production from ions of heavy metals, in particular copper. Studies on the evaluation of the adsorption capacity of materials have been carried out and choose the optimal method of manufacturing the sorbent.

Keywords: husks of sunflower, vegetable adsorbents, waste water, heavy metal ions, melanin

The problem of determining the environmental hazard in the development and disposal of oil contaminated soil at the time of construction of buildings and structures is very relevant, especially for sites on which previously located industrial zones with different production. Unfortunately, at the moment, there is no clear understanding of the MPC of petroleum products in the ground. Various inspection inspections and specialized landfills treat the degree of soil contamination with oil products in different ways. In this regard, there is a danger of incorrect definition of the hazard class of the soil, which can lead to subsequent pollution of the environment.

Keywords: soil, oil product, hazard class, resolution, pdk, range, ecological condition, soil utilization, construction, concentration, pollution

From the pilot section of the gas pipeline, after ten years of operation, specimen-witnesses were seized. The gas pipeline consists of reinforced polyethylene pipes with an average adhesive reinforcing layer. The results of mechanical tests of model samples are given in the article. Investigations of the deformation-strength properties of the witness specimens show a decrease in the temperature of the viscous-brittle transition to -15 ° C. These results indicate a deterioration in the adhesion between the outer layers of PE80 and the middle technological layer. Good adhesion led to the emergence and development of a fragile crack. Stability tests at constant pressure showed satisfactory results, not a single sample collapsed. According to the research data, the reinforced polyethylene pipe did not deteriorate its deformation-strength properties for ten years of operation of the gas pipeline under pressure.

Keywords: Reinforced polyethylene pipe, specimen-witnesses, adhesion, stretching, viscous-brittle transition, resistance at constant internal pressure

Covers the relevant issues of reduction of construction period by using prefabricated structures. The proposed method is confirmed by calculations proving its reliability and feasibility. When developing the method was considered economic component of the design and construction of industrial complexes

Keywords: organization of construction; modular construction, industrial construction

The methods of directed formation of the variational structure of concrete products and structures are considered in the article. The experience of Russian scientists in the issues of obtaining articles of different density over the section has been studied. The problems of the technology of obtaining articles of different density along the section are considered, the main principles of shaping the variational pore structure of aerated concrete for monolithic enclosing structures, the optimal schemes for forming two-layer wall products from concrete of various densities, forming a structure with a double skeleton - mineral and polymeric - by sintering the polystyrene grains, the formation of variational structure of magnesian foam concrete, which involves sequential laying of foam masses with various average, perspectivity of the use of reinforced concrete constructions of a variational structure.

Keywords: Variational structure, concrete products and structures, reinforced concrete, aerated concrete, foam concrete, expanded clay concrete, density, fire resistance

The soils of the territories adjacent to the city of Rostov-on-Don are studied, characterized by a highly developed transport system. Agricultural land adjacent to the highway is often closed by forest strips. But, large areas of land are not protected by forest strips. A lot of lead accumulates in the soil of open agrocenoses. It is necessary to create forest belts around new highways

Keywords: soil, iead, mobile forms, gross content, forest melioration

The soils of the territories adjoining the waste pits of coal mines are investigated. In the soil, quantities of copper, zinc, nickel and lead were found, more than MPC. Excess of MPC for cadmium is not noted. The content of copper and nickel is 2-3 times higher than their permissible content in the soil, and this situation is observed throughout the study - up to 500 m. A slight excess of the maximum permissible concentration of zinc and lead was noted at a distance of 200-300 m from the waste. It is necessary to restore the territories after the removal of anthropogenic source - waste heaps.

Keywords: soil, copper, zinc, nickel, lead, cadmium, mobile forms, waste heaps

The location of the buildings in the complex development of underground space in big cities of Russia can be attributed to the peculiarities of modern construction. Therefore, the reliability of the waterproofing of the whole circuit structures are the most relevant. Improving the technology and organization of construction contributes to the development of the main directions in the creation of progressive waterproofing materials. The definition of a number of principles for organizational and technological solutions of production of waterproofing works allows us to develop new methods of hydroprotection of underground structures.

Keywords: waterproofing of buildings, waterproofing materials, organizational-technological solutions in the production of hydroprotection

TiO2 thin films are widely used as a transparent layer n-type conductivity in the perovskite solar cells. Nanocrystalline TiO2 films were deposited on the surface of glass substrates coated with tin oxide with fluorine (FTO) by spin-coating and subsequent laser annealing radiation with a wavelength of 1064 nm. The effect of laser annealing on grain size in the TiO2 film and spin-coating speeds on its thickness. It is found that the grain diameter in the resulting TiO2 films on average 17-64 nm at a power of laser annealing 30-70 W. It was found that the thickness of the TiO2 film is changed in the range of 72-124 nm spin-coating speed. Optimal parameters TiO2 thin film formed by laser annealing can enhance the efficiency of the perovskite solar cell.

Keywords: thin film, TiO2, centrifugation, laser annealing, surface morphology, thickness

The developed calculation dependencies for determining the log truck movement indicators during non-steady and steady motion in different modes make it possible to solve technical-economic tasks with adequate accuracy and certainty during planning and optimization of wood transportation. During two-stage timber hauling a log truck based on MAZ-6312B9 has advantages in exploitation and technical-economic indicators in comparison with a log truck based on Scania R-420. There are opportunities for a rapid increase of passing ability of a log truck while using an active trailer. This provides the work of a complete log truck on a forest road, and also there is a possibility to eliminate two-stage timber hauling, with rise of efficiency and technical-economic indicators

Keywords: wood transport, optimization, log trucks, motion simulation, efficiency

The influence of mechanical activation conditions on the the sintering temperature, grain size and microstructure of PZT-19 ceramics was established. It was found that the mechanical activation method allows to increase the uniformity of ceramics grains.

Keywords: ferroelectrics, particle size distribution, green building, mechanical activation, PZT