Experimental data are given on the change in temperature and end time of hardening of a gypsum binder in the presence of a fulleroid-type carbon nanomodifier, as well as the properties of nanomodified hardened high-strength gypsum: strength, density, water absorption, and softening coefficient. When performing the experimental part of the work, the gypsum binder was mixed with fullerenol solutions with different pH: neutral, acidic, alkaline. Conclusions are drawn about the effect of fulleroid nanoparticles on the rate of setting and hardening of gypsum and the characteristics of gypsum stone. The nanomodifier affects the rheological properties of the mixture and the temperature of the binder hydration process, which affects its physical and mechanical characteristics, density, and water absorption.

Keywords: gypsum binder, fulleroid nanomodifier, temperature, hardening time, gypsum dough, gypsum stone, properties

This article is devoted to the issue of the use of geosynthetic materials in drainage structures that can be used at oil and gas fields. In connection with the development of construction and building materials in the world, there is a need to apply technologies and solutions aimed at optimizing and reducing the cost of construction work, facility operation. The article presents block diagrams for the classification of geosynthetic materials according to various parameters. The issues of the use of geosynthetics and their functions in construction, in particular in drainage structures of oil and gas fields, are considered. The analysis of the regulatory and technical base within the framework of the study was made, the regulatory documents under consideration. The study of this topic makes it possible to determine the set of properties and functions required for geosynthetics, as well as to establish the most effective drainage structures using geosynthetics using the method of technical and economic comparison, which can be used in a real object.

Keywords: geosynthetic material, drainage structure, dewatering, groundwater, oil and gas field

The article reveals the main aspects of the formation and evolution of the planning framework of the studied cities of the Lower Don and Azov region (Rostov-on-Don, Nakhichevan-on-Don, Taganrog and Novocherkassk). Particular attention is paid to the formation of both integral systems and individual squares in the structure of these cities. The main periods of architectural and planning evolution of the cities under consideration are determined.

Keywords: city square, Rostov-on-Don, Nakhichevan-on-Don, Taganrog, Novocherkassk, master plan, urban development

А comparative analysis of individual indicators of the classical and new methods of strengthening reinforced concrete structures is given, a possible option for increasing the level of efficiency of external composite reinforcement is shown. The elements of the research program are presented, with a description of the materials and the main characteristics of the samples.

Keywords: reinforced concrete, concrete, rebar, composite materials, carbon fiber reinforced plastic, reinforcement, external reinforcement, experiment

This study analyzes the microstructures of hot-deformed powder materials, considers the physics of processes, what physical changes the powder grains have undergone, which is monocrystallites of different sizes and configurations, the direction of crystallographic planes to the plane of the slot. The influence of the size of the initial particles on the structure formation of powder alloys, taking into account the features of homogenization during sintering, was investigated. The nature of deformation of particles of porous compacts from steel of two types of charge (coarse and fine iron powder, with different porosity) was considered.

Keywords: Physics of processes, fusion surfaces, quantitative characteristics, hot-deformed powder materials, microstructures, single crystallites, structure formation, particle size, homogenization