Every year, the problem of recycling industrial waste in the construction sector is becoming increasingly important. Recycling and recycling of waste is an important way to reduce environmental damage. For more than one decade, developing technological processes and installations for the processing of concrete and reinforced concrete. Annually in Moscow, about 11.5 million tons of construction waste are generated, and in the near future the increase in the volume of concrete scrap in the demolition of buildings, reconstruction, overhaul and accumulation of substandard structures will reach 13-15 million tons per year.

Keywords: Waste recycling, construction, waste treatment, Demolition of housing, industrial waste, enterprises

The article deals with the problems of using structural systems with outriggers for high-rise buildings. The analysis of various designs is carried out, the features of their work are specified, the advantages and disadvantages are identified, the areas of their application.

Keywords: high-rise building, structural system, outrigger, skyscraper, column, core of rigidity, strength, reliability, horizontal load, aerodynamics

The article analyzes the reasons for the energy intensity of the Russian economy, as well as the existing problems of energy saving in the housing stock of Russian cities as one of the element in the housing and communal services system. The authors proposed strategic directions of energy saving for all participants of the housing and utilities sector. Prospective directions of the solution of the problem of energy saving in this area are noted.

Keywords: energy intensity of the economy, energy saving, energy efficiency improvement, housing and communal services, housing stock, participants in the housing and utilities sector

The paper presents an analysis of the processes of formation and processing of vegetable waste. An assessment is given to the existing ways of processing woodworking wastes and their inefficiency is justified. A new kind of resource and energy-saving grinding set of disk mills is proposed. On the basis of the analysis of the results of experimental research, the effectiveness of the use of the proposed method for the production of wood fiber is substantiated.

Keywords: abrasive set, grinding, efficiency, wood-fiber semi-finished product, specific fiber surface, wood pulp, defibrator, refiner, refiner, knife grinding

the article presents the ways of implementation of the strategy focused on the optimization of the process of heat transfer of solar installations, with the applied in their device combined heat exchange panel of aluminum profile elements tightly crimping copper tubes with coolant. Based on the comparative analysis of the two configurations of this device, the methods of heat transfer intensification from the absorbing surface to the working medium in flat-type solar collectors are proposed

Keywords: energy saving, efficiency, optimization, heat transfer, heat capacity, heat exchange panel, heat exchange, solar installation, solar collector, alternative energy sources

The article deals with the problems of social inequality in society. The criteria for assessing social immunity, as well as ways to combat social inequality in modern Russian society.

Keywords: society, social immunity, social inequality

At present, progress in building materials science and the construction industry is gaining in importance. New technologies provide high quality products, its environmental safety, efficient use of raw materials, saving resources. The creation of high technologies is possible only with the use of the latest achievements in physics, chemistry and other basic sciences. To date, the most promising are nanotechnology.

Keywords: nano-concrete, natural raw materials, additives, macro-reinforcement, fiber, nanostructure, crack resistance

The article analyzes the problems and prospects for the development of green technologies and green construction in Russia and the world as as well. The author provides us the information about the outstanding examples of green buildings in the world. The dynamics of construction of green buildings for the period from 2000 to 2018 has been revealed in the article. It is also presented the advantages of introducing green technologies in the construction of buildings with respect to all participants in the construction process. By opinion of the author the important role in the part of stimulating the development of green construction plays the state, legislative initiatives. Factors restraining the growth of eco-sustainable construction in our country are revealed

Keywords: green technology, ecological construction, sustainable development, green building, resource saving, green standards, energy efficiency

A thin circular disk is considered, the material of which exhibits elastic and plastic properties under thermal and force influences. In the central part of the disk, the temperature field is uniform. At the boundary of the disk, pressure and a constant temperature are set. Approximation of a plane stress state is adopted. The additive form of the connection of full, elastic, plastic deformations and deformations under free thermal expansion is considered. Elastic deformations are expressed in terms of stresses according to Hooke's law. A linear approximation of the dependence of the plasticity limit on temperature is proposed. The possibility of neutral loading of the central region of the disk and its external boundary is shown. Especially distinguished is the condition for the plasticity of Tresca.

Keywords: mathematical modeling, elastoplastic body, plane stress state, piecewise-linear plasticity conditions, plastic flow theory, thermoelastic plasticity

The steps of constructing an algorithm for calculating the stressed and strained state of a thin circular disk experiencing thermal and force effects are discussed. A homogeneous temperature field is created in the central part of the disk. Within the framework of the theory of the flow of an ideal elastoplastic body, conditions of general plasticity are considered. It is assumed that the plasticity limit for uniaxial tension is common for all plasticity conditions. Dependencies between the disk radius, the temperature of the central region of the disk and the external pressure, which determine the appearance of plastic regions, are established. For piecewise-linear plasticity conditions of general form, analogous dependences are defined, when singular plasticity regimes are realized at elastoplastic boundaries. For different values ​​of the input parameters of the problem, the stresses, equivalent stresses and the hodograph of the stress vector are given.

Keywords: mathematical modeling, elastoplastic body, plane stress state, piecewise linear plasticity conditions, plastic flow theory, thermoelastic plasticity

The article considers the experimental estimation of the heat transfer coefficient in a hybrid immersion cooling system with contact point cooling and dry zones. The change in the heat transfer coefficient is made through a change in the Reynolds number for the flow of the coolant in the immersion cooling system. The experimental investigation is carried out on the basis of a numerical simulation model of the process under study. As a result, the dependences of the thermal resistance of the processor-heat exchanger system on the heat transfer coefficient and on the Reynolds number of the turbulent flow were obtained, and the results with the simulation results were estimated. It is found that, with an increase in the Reynolds number, the heat transfer intensification is weaker than the theoretical one. The refinement coefficients for the case under consideration are found.

Keywords: processor, heat flow, thermal resistance, Laplace equation, turbulent flow, Reynolds number, heat transfer, immersion cooling system, immersion cooling system, cavitation

The paper presents the development of a system for detecting the status of control and protection system drives (CPS) of a water-water power reactor by vibration signals using the frequency components method. Results of experimental researches at the "Izhorskiy Plant" PO are given. Spectral analysis is used to isolate the frequency ranges of the CPS diagnostic signal spectra, and to develop diagnostic standards. The work describes formation of reference diagnostic vectors (a set of diagnostic features in the form of a binary code) and their comparison with the current state. The developed standards formed the basis for the system of automatic recognition of the object state. The introduction of such a system will simplify the task of collecting, analyzing, comparing drives data during operation at nuclear power plants, as well as improving methods of testing and diagnosing CPS drives, which should positively affect the reliability and resource of equipment.

Keywords: CPS drive, technical diagnostics, spectral analysis, diagnostic vector, state recognition

In this study, the task is to simulate the cooling system of supercomputers with a heat pump on the reverse Stirling cycle by numerical simulation of heat transfer processes in the object under study. The results of numerical simulation of heat transfer processes in the superheater processor cooling system with a heat pump on the reverse cycle are presented. A numerical model of the heat transfer process was investigated. As a result, the dependencies of the required thermal lift of the heat pump are obtained taking into account the thermal resistance of the system. The first liquid cooling circuit - the cold cylinder of the heat pump and the hot cylinder system - the second liquid cooling circuit, depending on the heat transfer coefficient of the heat pump.

Keywords: processor, heat flow, thermal resistance, Laplace equation, heat pump, heat exchange, Stirling backflow, cooling system

The work of the sensors of passenger traffic control in conditions of a dense stream of people in the controlled section of the doorway was conducted. The results showed the possibility of determining the direction of movement of a person due to a change in the distance between the sensor and the moving person. The interference due to the high density of passenger traffic, which, however, does not lead, however, to the development of the corresponding algorithms, to false alarms of the sensors is detected. However, additional field studies are required on the vehicle of the passenger counting device based on ultrasonic distance measurement sensors

Keywords: passenger, ultrasound, passenger transport, road transport, distance sensor, Arduino, bus

The field studies of the device in a controlled section of the doorway of the trolleybus were carried out. Studies have shown the operability of the device with the appropriate information processing algorithm, which allows to extract an information signal from short-term interference. It is necessary to carry out on the vehicle additional field studies of the passenger counting device based on ultrasonic proximity sensors aimed at eliminating the reflection of interference from the walls and, accordingly, improving the accuracy of counting the number of incoming and outgoing passengers.

Keywords: passenger, ultrasound, passenger transport, road transport, distance sensor, Arduino, trolleybus