The article discusses one of the national environmental problems - a negative impact on the environment from improper placement of drill cuttings. The main source of pollution is oil products, chemical reagents added to drilling mud and heavy metals that are part of drill cuttings. Methods for the treatment of drill cuttings, which consist of burial, neutralization and disposal are presented. A more promising and cost-effective method is the disposal of drill cuttings. A disposal method was chosen, consisting of the use of dried drill cuttings as a mineral powder for the preparation of asphalt concrete mixture. Samples of drill cuttings from different fields of Russia were selected. Laboratory studies of drill cuttings samples were carried out and the results of the content of heavy metals, physical and chemical indicators, physical and mechanical indicators of asphalt concrete samples were given. During the research it turned out that the content of heavy metals does not exceed the established norms, the physical and chemical indicators have exceeded the established standards, the physical and mechanical indicators of asphalt concrete samples comply with the requirements of regulatory documents.

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Abstract. The research presented in the article shows the possibility of using some polymer materials in the composition of asphalt concrete. The analysis of scientific works in the field of asphalt concrete design shows the efficiency of using plastic waste to obtain asphalt concrete with specified physical, mechanical and operational properties. This technology allows not only to reduce the amount of accumulated plastic waste, but also to improve the condition of highways by increasing the strength of asphalt concrete. Polymers PP and LDPE were selected for the study. As PP samples, we used a nonwoven material used for the production of disposable medical masks, which is suitable for creating linear or dispersed reinforcement of asphalt concrete. LDPE was used as the second polymer sample. The obtained asphalt concrete samples differ from the traditional composition by their increased compressive strength at high temperatures while maintaining plasticity at low temperatures.

The article presents modern methods of diagnosing hydraulic drive. The drawbacks of modern diagnostic methods are revealed. The negative consequences of the effect of stagnation of the working fluid. The results of studies of working fluid samples are given. Suggested ways to solve the existing problem. A method for determining the nodes subject to the effect of stagnation of the working fluid is proposed. The effect of solving the problem of stagnation of the working fluid is determined.

Additive manufacturing makes it possible to speed up the process of manufacturing a product using a CAD model many times over. This advantage is effectively used in the manufacture of small batches of products with complex surfaces in the automotive and aviation industries. Improvements in printers are needed to improve accuracy and productivity. Traditionally, delta kinematics are considered to have advantages over sequential linear kinematics due to their high travel speed and relatively low cost. However, delta kinematics has received limited application, mainly for personal FDM printers. The article attempts to understand the advantages and disadvantages of delta kinematics for use in 3D printers. For this, the displacements and velocities were simulated for four examples of motion trajectories. The analysis showed that the average speed of movement of the extruder is approximately equal to, and in some cases less than the linear speeds of movements along the rods. At the same time, to ensure a uniform speed of the extruder, significant accelerations are required along the individual rods. This leads to vibrations and ultimately limits the maximum speeds.

This research is devoted to the topic of gabion barriers as a tool to protect against road accidents on highways. Nowadays, the growth of vehicles has led to an increase in traffic accidents. Due to the fact that classic road barriers that are used on highways don`t always effectively perform their function, exists a need to configure a new more effective road barrier which would reduce traffic accidents as well as the cost of materials, device, maintenance and repair designs. The article provides a detailed analysis of the barrier fences used in the construction of roads of many countries. The paper deals with the theoretical and empirical aspects of road barriers. The article analyzes the traditional road barriers new foreign developments and a new type of gabion fencing, which was not considered by investigators as a tool for protection against road accidents on highways. For empirical evaluation of the benefits of gabions from classical barrier fences, the article presented a model of fencing, as well as software packages by which to evaluate the effectiveness of gabions as security barriers. The research and experience of road and bridge construction in many countries, including the domestic experience of recent years, demonstrated that gabion structures have very wide capabilities and properties, such as economy, durability and durability, which are key in the construction of roads.

The article discusses the use of waste metallurgical plant, waste foundry sand (OFS) in comparison with other small aggregates in the composition of asphalt concrete mixture. Due to the constantly growing intensity and loads from the rolling stock, there are high demands on asphalt concrete pavements. Basically, the stability of asphalt to shear deformations depends on the strength characteristics. Thus, the higher the strength of the asphalt concrete when testing samples at high temperature, the higher the shear stability of the road surface. One way to reduce the cost of building a highway, possibly through the use of industrial waste in the structural layers of pavement. The article presents the results of asphalt concrete tests using natural sand, quartz sand and waste foundry sand.

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