The results of studies of wet gas purification in a countercurrent scrubber for the purification of hydrogen sulfide-containing combined-cycle waste from oil and gas industry enterprises, and wastewater treatment and transportation systems are presented. A technical and economic comparison of various technologies for the purification of hydrogen sulfide-containing gas mixtures is presented

Keywords: steam-gas waste, hydrogen sulfide, hydrogen sulfide-containing gas mixtures, gas purification, electrochemical oxidation, electrolysis

Currently, special attention is paid to ensuring a high level of convenience and road safety. It is impossible to achieve this result without a clear understanding of the expediency of using certain theoretical provisions in practice. The solution to this problem lies in the timely development of simulation algorithms that allow us to accurately assess the effectiveness of applied engineering solutions in the project documentation.

Keywords: Parking, vehicle, capacity, road network, speed, traffic safety

One of the major disadvantages of the domestic industry is its high resource intensity, due, among other things, to the low level of use of secondary raw materials. There are a lot of problems associated with the disposal of polymer waste. They have their own specifics, but they cannot be considered insoluble. One of the methods of recycling is the use of plastic waste as aggregate in cement mortar and concrete preparation. The article contains and analyzes the methods, physical properties of concrete, with plastic aggregate and physical properties related to the operation, durability of concrete containing plastic aggregates. Based on the results of the review, it was concluded that the technique of using plastics in cement mortar and concrete preparation is effective and cost-effective. The results suggest that the use of recycled plastic fibers and pellets in concrete can lead to improved concrete properties. The article considers the physical properties associated with the operation and durability of concrete containing plastic aggregates and fibers, types of plastics and cement, the chemical composition of the cement used in the study, the main joints, shrinkage, compression strength, bending strength, modulus of elasticity, water adhesion and porosity, thermal conductivity, fire resistance. The use of recycled plastic aggregates and fibres as a building material is attracting increasing attention. The article considers the physical properties associated with the operation and durability of concrete containing plastic aggregates and fibers, types of plastics and cement, the chemical composition of the cement used in the study, the main joints, shrinkage, compression strength, bending strength, modulus of elasticity, water adhesion and porosity, thermal conductivity, fire resistance. The use of recycled plastic aggregates and fibres as a building material is attracting increasing attention.

Keywords: concrete, aggregate, plastic, strength, fibers, properties, waste, compression, mixture, material, quality

The main elements of the system of external reinforcement of bent reinforced concrete structures are fabrics and lamellas. Fabrics and lamellas are glued to the surface of building structures in a polymer matrix. The matrix provides adhesion of the reinforcing filler with the reinforced structure. The price of reinforcement with carbon lamellas is several times higher than for reinforcement with carbon fabric. The article shows a comparison of proposals on the market of building materials for the reinforcement of reinforced concrete structures with lamellas based on carbon fibers. On the example of a reinforced concrete beam of four types of cross-section, a comparative analysis of the selected reinforcement systems under different temperature conditions was carried out, a conditional utility coefficient was identified, showing the ratio of price to the percentage reinforcement of the structure. The results obtained can be used to select the most cost-effective composite reinforcement system.

Keywords: reinforced concrete beams; strengthening; composite material; carbon lamellas; external reinforcement; operating temperature

The stage of operation of a highway is one of the most important stages of its life cycle. The decisions made at this stage have a direct impact on the durability of the road, the safety and transport costs of its users. Optimization of the decisions made is an urgent task that requires a comprehensive consideration of both the technical and economic components. Within the framework of this work, using the algorithms of artificial neural networks (ANN), a mathematical model of the ANN was developed to determine the integral level of pavement safety, based on a complex of structural and operational factors, including the modulus of elasticity of pavement layers, longitudinal evenness, rutting, and the presence of fatigue failures. On the basis of the integral level of pavement safety, its operational condition is predicted, a scale is assigned for the selection of control actions to ensure its required durability.

Keywords: artificial neural networks, integral safety level, falling weight deflectometer, road maintenance, road life cycle management

The optimal ratio of geometric parameters is found, taking into account the rational distribution of forces on the surface and the minimal change in the shape of the cylindrical mesh shell. As part of the increase in overall dimensions to determine the bearing capacity of the structure, a research program was compiled, an experimental installation was designed and tests were carried out on a physical model. According to the results of the conducted studies, the necessary parameters of the stress-strain state of the shell were determined. The effectiveness of the methods of strengthening the system supports using puffs and horizontal trusses was tested. The regularities of the shell behavior under conditions of full and unilateral application of loads are established. The influence of reinforcement methods on the general condition of the mesh surface is investigated. The degree of unloading of the rod system in the case of horizontal trusses was determined and a significant increase in the load-bearing capacity of the structure was established due to the use of tightening in the support zone.

Keywords: cylindrical mesh shell, geometric parameter, reinforcing element, tightening, horizontal truss

The article considers the directions and speeds of the air flow characteristic of the linear city of Volgograd. Weibull's law was tested for various wind speeds in various wind directions characteristic of Volgograd.

Keywords: climate, linear city, wind speed, wind direction, distribution law, distribution law, Weibull law, logarithmically normal law, impurity transport

Studies of the possibilities of BIM modeling in the field of ventilation systems design show that the current level of development of BIM technologies allows for aerodynamic calculation. An example of software with such capabilities is Autodesk Revit. This article provides a comparative analysis of two calculation methods: according to the standard methodology and the Colebrook formula, calculated on Revit software. The calculation error was 14.08%, which does not exceed the permissible value of 15%. Thus, the prospects of using the Revit program to perform aerodynamic calculations are shown.

Keywords: BIM-modeling, ventilation systems, 3D design, Autodesk Revit, aerodynamic calculation, BIM-technologies, information modeling

Numerous factors that determine the quality of monolithic reinforced concrete massive foundations predetermine the relevance of a thorough study of a set of issues related to the intensity of concreting, the technical capabilities of the contractor, temperature and humidity conditions, the characteristics of the technological properties of the concrete mixture and the kinetics of concrete hardening. To ensure the solidity of the structure, the expediency of determining the thickness of the layer to be laid is justified not only by the length of the working part of the vibrator, as prescribed by the standards, but also by the indicators of the intensity of concreting, determined by the design parameters, temperature and humidity conditions and the capabilities of the worker. The influence of the temperature and humidity conditions of the environment and the recipe features of the concrete mixture on the rational time of overlapping layers is shown. The results of modeling the level of tensile stresses on such recipe-technological factors as the class and kinetics of concrete hardening, temperature conditions and conditions of heat exchange with the environment are given on the example of a temperature-shrinkage block 20x20x2 m. the values ​​of its parameters. An equation is given for relative moisture loss over the thickness of the structure in dry hot weather when self-compacting concrete mixtures are used.

Keywords: intensity of concreting, quality of massive monolithic foundations, overlapping time of layers, moisture loss, level of tensile stresses

Designing foundations and foundations for buildings and structures of high-rise complexes is a complex engineering task. Modern architectural concepts and constructive solutions should be based on geotechnical justification at the stage of developing the architectural design of the project. Huge loads from above-ground structural elements of high-rise buildings and the high cost of measures for the installation of underground structures create their own characteristics in the design of foundations. In this paper, we study the problem of choosing the type of foundation for a high-rise building from the point of view of technical and economic rationality based on studying the experience of designing complex multifunctional complexes in Moscow and St. Petersburg. The authors believe that the choice of a constructive solution for the foundation of a high-rise complex is influenced by both geological factors and socio-economic ones. The result of this study is the grouping and systematization of the geotechnical factors of the building area and the economic factors of the urban environment that directly or indirectly affect the construction projects of high-rise complexes.

Keywords: high-rise complexes, slab and pile foundations, combined foundation, RIT-piles, geotechnical calculation, geotechnical monitoring, geotechnical factors, socio-economic factors, rational choice

The article deals with the distribution of fine dust in the atmospheric air of roadside areas of cities with a linear configuration, factors affecting its concentration in the roadside area.

Keywords: fine dust, roadside areas, road transport, wind speed, meteorological parameters

For successful training of students in educational institutions, modern laboratory equipment must be present. This equipment should be affordable, small enough to fit in a classroom, easy to maintain and operate, and versatile enough to allow students to conduct research with faculty or on their own. All this indicates the relevance of this work. The purpose of the work is to create original training equipment for seed germination. Work on a new design of educational equipment required to study and generalize the results and experience of using similar equipment known from the state of the art, as well as to study known methods and technologies. In the course of work, using elements of system analysis, new design solutions were found for the layout of universal training equipment for seed germination.

Keywords: germinating table, training equipment, seed germination, seed quality

The article presents the results of a study of the economic efficiency of winemaking in the Rostov region, the state and development trends of the regional market for table and sparkling wines in the northern zone of viticulture.

Keywords: winemaking, wine production, efficiency, wine market, share of wine in the regional market

This article discusses the modeling of a 4th order Butterworth bandpass filter, with the Sallen-Key topology, composed of 2 stages with a bandwidth from 31.5 Hz to 8.5 kHz, designed to work as part of a digital noise level meter . Modeling was carried out in a modern computer-aided design package Filter Design Tool from Texas Instruments. The simulation results are presented, a conclusion is made about the correspondence of the parameters of the simulated filter to the calculated ones. The filter has a satisfactory quality factor, amplitude deviation in the passband, is quite simple and economically acceptable from the point of view of its implementation.

Keywords: noise meter, bandpass filter, Butterworth filter, Sallen-Key topology, modeling, CAD

The author carried out the development of the measuring unit of the intellectual system for the protection of the territory. Based on the review of devices of a similar purpose, a block diagram of the device was developed. A functional diagram of the developed device based on the block diagram has been developed and described. The description of the computer experiment on modeling the operation of the input block of the circuit in Micro-Cap, its results and analysis is given.

Keywords: measuring unit, intelligent system, modeling, vibration, triboelectric sensor

The article describes the development of an electrical impedance tomography module with the following characteristics: number of electrodes n = 16; injected current I = 5 mA ± 2%; permissible error of the measuring channel δadm = 2%; injected current frequency f = (10…400) kHz; resulting voltage on the injection electrodes U ≤ 12 V; the shape of the injected current is sinusoidal, triangular, rectangular; USB data interface. A functional diagram of the device has been developed and described. Simulation of a current source with a connected load in the MicroCap software package was carried out

Keywords: electrical impedance tomography, ventilator, disease diagnostics, modeling

in the course of designing a device for measuring the instantaneous velocity of plasma in an electrodynamic accelerator, a block diagram of the implementation of the developed method was developed. A mathematical description of the calculation of the instantaneous velocity of plasma in an electrodynamic accelerator is presented. The choice of a realizable method for measuring the instantaneous velocity of plasma in an electrodynamic accelerator using a differential-total-ratiometric coordinate function and approximating the position sensor signal by an inverse-exponential function is substantiated. Simulation of the computing unit of the device in the Micro-Cap environment has been completed.

Keywords: measuring device, electrodynamic accelerator, plasma velocity, differential sensors

A description of the new assessment tools in the form of case tasks is given, which most fully reflect the level of mastering the professional competencies laid down in the study of the discipline. Case-meters include special problematic tasks, for the solution of which it is necessary to analyze the situation that requires updating the complex of professional knowledge. The results of this type of testing give a fairly complete picture of the professional and personal qualities of a specialist. The description of the developed special software for automatic checking of case tasks for assessing the professional skills of students in the discipline of the database is given.

Keywords: situational case, assessment tools, tests, assessment, case tasks, software application, design