Composite polymer reinforcement (CPA) is increasingly applied in modern building industry. The areas of application of CPA are determined by the special properties of this material, such as stability in aggressive environments, magnetic inertness, low thermal conductivity. Glass composite reinforcement (GCR) are in the greatest demand, due to the availability of chemically resistant fiberglass and wide industrial elaboration of the GCR manufacturing technology. However, the relatively low modulus of elasticity, which does not exceed 50 GPa, is an obstacle to its application in concrete structures, that operate on bending. Proposed solution for increasing of modulus of elasticity of composite polymer reinforcement is the creation of combined reinforcement based on low-modulus and high-modulus fibers impregnated with epoxy polymer binder.Achieving the goal made it possible to establish trends for increasing the modulus of elasticity of composite reinforcement based on glass and carbon fibers with the use of an epoxy polymer matrix by evaluating the optimal ratio of the components of the epoxy binder within the framework of the well-known technology of the fillerless manufacturing method. It has been established that one of the methods of increasing the modulus of elasticity of composite reinforcement is the modification of the thermosetting polymer binder with a reactive diluent - diglycidyl ether of the epichlorohydrin homooligomer. The action of the latter is based on its ability, in small quantities, to influence the structure of the matrix epoxy anhydride binder net, ensuring a relatively high yield of the sol fraction under the conditions of a shortened period of hardening time, provided for by the technology of obtaining composite reinforcement. It is shown that in the presence of hybrid reinforcement and the optimal amount of the modifier, it is possible to achieve an elastic modulus of 50 GPa, which, in our opinion, is due to the implementation of increased adhesive contact with glass and carbon fibers and ensuring the necessary monolithicity of the polymer composite. Keywords: composite polymer reinforcement, glass and carbon fiber, modulus of elasticity, adhesive strength.

The research results of the effect of concentration of injected mineral filler on change in adhesion strength of acrylic adhesive composition to the metal substrate are given in the article. The adhesive composition was prepared based on pre-compounded reaction system: the stabilized monomer – methyl methacrylate and polymer modifier – sterol copolymer with methyl methacrylate with followed filling and polymerization in the presence of a redox system. It is shown that the mobilization to resource preservation of the adhesive contact at the allowable amount of the filler and the thickness of the adhesive layer is due to the overall contribution of the dispersed phase in the change of the structure and macrophysical properties. Experimental data confirm the obtained dependencies: the adhesive strength of the adhesive from the contact area to steel wire; density, glass transition temperature and the calculated value of the Simcha-Boyer constant of block samples from the amount of the filler; character of reducing dynamic shear modulus of the filled composition during heating. It is suggested that the decrease in density in a volume of polymer phase of filled system provides a slight decrease in adhesion strength of acrylic adhesive to the substrate.

The issue of increasing the corrosion resistance of composite reinforcement, based on glass fiber and epoxy anhydride binder, is considered. The proposed samples of composite reinforcement were manufactured by needle extrusion technology. Glass fibers were evenly distributed in the channels and impregnated with a polymer binder based on epoxy resin. The amount of phenolic modifier in the polymer binder, according to the technological mode of obtaining composite reinforcement, was brought up to 5%. With a further increase in the content of the modifier, the degree of conversion of epoxy groups was no more than 70%, which sharply reduced the operational characteristics of the material. The overall ratio of polymer binder and glass reinforcement in the composite was ~ 60÷40. It was established that at low concentrations of the polymer modifier (up to 5 wt. parts), the processes of ordering and chemical grafting lead to compaction of the molecular grouping in the system, which in our case is characteristic of phenolic resins of the novolach and resol types. At the same time, under the conditions of the production technology, internal stresses in materials of this type increase sharply, which leads to the formation of surface defects (microcracks). At the tip of a crack or defect, sodium ions or other cations under the action of water undergo hydrolysis to form metal hydroxide, which, in turn, causes hydrolysis of siloxane bonds, thus weakening the mesh structure of silicon dioxide. The experimental activation energy was identified with the activation energy of sodium ion diffusion in the glass mass. But the plastic deformation of the glass in the region before the crack is very small, and instead of a uniform distribution of stress, the material cracks along the weakened centers The obtained data indicate that the action of the alkaline environment causes an increased loss of mass of the composite, both for the unmodified and for those modified with traditional phenolic resins. In turn, this ensures a high degree of penetration of alkalis into the volume of the material, access to reinforced fibers with their subsequent damage. To increase the corrosion resistance of composite reinforcement based on an epoxy anhydride binder, it is advisable to use a reactive sulfur-containing phenolic modifier. Its action is based on the ability to maintain the permissible monolithicity of fiberglass in the alkaline environment of concrete, the modulus of elasticity and necessary strength. Keywords: composite polymer reinforcement, fiberglass, alkaline environment, phenolic modifier.

Based on statistical data, the main reasons for the low level of labor protection organization in Ukraine are formulated. In recent years, there has been a sharp increase in cases of industrial injuries. UAH 334 million was spent on monthly insurance payments to families who lost breadwinners. for temporary incapacity for work due to an accident or occupational disease - UAH 138.1 million. The data presented in the article indicate that the main causes of fatal accidents are organizational, psychophysical, technogenic, and technical. The main reasons for the low level of labor protection organization in Ukraine are given by the authors, who say that in today's conditions, the labor protection management system should be based not only on measures from the state, but also on the interest of the subjects of labor relations in maintaining the proper physical condition of the employee. A real health risk assessment is impossible without a sufficient information base on the quantitative and qualitative characteristics of risk factors and data on the health status of those contingents of the population that are exposed to these factors. The effect of potentiating with the combined influence of professional and non-professional factors has been established. Therefore, there was a need to develop new methods of analysis and modeling of the conditional probability of the occurrence of an industrial injury, acceptable for practical engineering calculations. The proposed indicators of the level of ensuring the safety of people at the objects are the probability of preventing exposure to dangerous factors of the production environment and work process, which can be determined by the full risk of an accident. Thus, on the basis of the application of the probabilistic method for modeling the conditional probability of injury to an employee during technological operations, an assessment of the probability of an accident and the development of various variants of dangerous situations was carried out. This will make it possible to get an assessment of the circumstances and conditions that contribute to the occurrence and development of traumatic situations at work. Keywords: labor protection, occupational injuries, industrial environment, accident, risk, danger, harmfulness, probability.

Recent research has shown that city noise has a negative impact on human health. Noise maps have been widely used in recent years and are used to visualize the noise regime of territories. When constructing such noise maps, lines of the same sound level connect those points on the terrain plan, where quantitatively equal decibel values are recorded. However, such a picture, as well as having a good time in the two-dimensional expanse, in the area, it is not enough to precisely identify the boundaries of the zones of acoustic discomfort, which may cause a trivial vimir. Spacious pictures to noise can be a large number of spacious figures, which can show the standard sound for the objects in the highest noise in the decimal areas (three open spaces), the base must be left open, open, vimіr is a hang over the surface of ґrunt. Vicoristuyu described in the robot model, vrakhovuychi characteristics of the direct soundness of the energy and noise, there is the ability to computerize the process of awakening sound fields in the vast expanse. The presence of trim models also significantly increases the accuracy of noise maps. To gain a spacious picture of dzherel noise, the technique described in the robot is to be heard. To evaluate the noise clutter in the territory of the center of Kharkiv metro station, in the capacity of the butt, the bull was inspired by the 3D model of the given data from the specifications of the features of the rel. Keywords: ArcGIS 3D model, noise map, model, noise.