The article discusses the main aspects of architecture in the Russian style. The study of the structure of Russian and neo-Russian style structures makes it possible to understand the features of creating fractal elements of these unique and distinctive buildings. The characteristic elements of Russian-style architectural structures are listed. The differences between the structures built by architects in Russia at different times are shown. The article considers examples of the harmonious inclusion of buildings of Russian architecture in modern urban space. The development of this style in our time is of interest in Russia and in the world. It is necessary to develop and rethink traditional methods of image and shaping, developing national architecture.

Keywords: architecture, Russian style, architectural element, fractal structures

The paper presents an analysis of the methods for the chemical modification of biochar. The characteristics of acid and basic modifications, modifications with hydrogen peroxide, sulfonation, amination, impregnation with metal oxides, and magnetization are examined. It is demonstrated that the method of modification, the parameters of the technological process, and the nature of the modifying agent all exert an influence on the chemical composition, structure, porosity, pore size, and total specific surface area of the modified coal. The combination of methods, technological parameters, and modifiers allows for the production of sorbents for wastewater treatment based on biochar with specific properties for the sorption of certain groups of different pollutants.

Keywords: biochar, chemical modification, sorption properties, porosity, pore size

The study of the structure of structures of Gothic and Neo-Gothic styles makes it possible to understand the possibilities of creating fractal elements of these unique buildings. The methods of determining the fractal dimension for an object both on a plane and in space are shown. The characteristic elements of the frame structures of Gothic architecture are listed. The differences between the structures built by architects in Russia and the buildings of Western architecture in Europe are shown. The article examines examples of the harmonious integration of Gothic architecture buildings into modern urban space. The article discusses methods for calculating the fractal dimension of objects of Gothic architecture with a high degree of fractality.

Keywords: architecture, Gothic style, neo-Gothic, element, fractal, fractal dimension

This article discusses the use of dolomites from the Bosninsky deposit in the production of building materials and products. This topic is very relevant at the present time, as the construction industry is developing, new types of structures are appearing, higher requirements are imposed on the physical and mechanical properties of concrete mixtures. Large volumes of concrete mix production require the use of local component deposits to improve technical and economic performance.

Keywords: construction, building material, dolomite, environmental pollution, ecology, concrete mix, new technology

This article discusses the use of secondary raw materials from industrial plants in the production of heavy concrete. This topic is very relevant nowadays, as the construction industry is expanding every year, and the need for concrete mixtures is increasing. Due to the increase in the production of concrete mixtures, the amount of natural raw materials used as a filler is reduced, therefore alternative raw materials are required to preserve natural reserves.

Keywords: construction, building material, industrial waste, secondary raw materials, environmental pollution, ecology, concrete mix, new technology

There are a lot of monolithic and precast-monolithic reinforced concrete structures in construction. The relevance of the issue of ensuring reliable contact of concrete in the seams and joints in the contact zone of newly laid (""new"") concrete with already gained a certain strength (""old"") concrete is increasing. In the work, the influence of the pH of the medium on the adhesion strength of ""new"" and ""old"" concrete, which occurs when making joints in prefabricated monolithic structures and organizing technological seams of concreting in monolithic construction, was considered. Standard methods were used. Experimental data have been obtained that indicate the influence of the pH of the ""new"" medium on the adhesion strength of the ""new"" concrete with the base of the ""old"" concrete. The analysis and comparison of the received results with the data of the researches conducted earlier is carried out. Recommendations are formulated to improve the strength of concrete contact in seams and joints during the construction of monolithic and precast-monolithic reinforced concrete structures.

Keywords: new-to-old concrete bonding, technological concreting joint, monolithic reinforced concrete structures, precast-monolithic reinforced concrete structures

The article presents the study results of a soil-like fraction contamination at a landfill located on the territory of the Traktorozavodsky district of Volgograd with heavy metals. The soil-like fraction's pollution level was assessed using a cumulative chemical pollution index (Zc) and its modifications. It was determined that the contamination levels with heavy metals are dependent on a used cumulative chemical pollution index modification. The use of the average geometric values of a cumulative chemical pollution index (Zc) is preferred for a pollution assessment of a soil-like fraction. Because the pollution level of a studied soil-like fraction was assessed as hazardous, its use as a recultivation material can only be permitted after a detoxification.The main pollutants in the soil-like fraction are cadmium, copper, and nickel.

Keywords: landfills, soil-like fraction, heavy metals, pollution level

The article discusses the methodology for conducting building control using an information model of building structures and a cloud of points obtained using ground-based laser scanning technology. The proposed technique makes it possible to increase the efficiency of identifying geometric deviations in the course of monitoring the construction of industrial, civil and infrastructure facilities.

Keywords: digital technologies, BIM model, information model, point cloud, terrestrial laser scanning, construction control

The paper presents the results of engineering and environmental surveys at the object of accumulated environmental damage - an unauthorized dump on the territory of the Shuvalov industrial zone in the Leninsky district of Nizhny Novgorod. A description of the study of the territorial and natural features of the object is given: landscape, representatives of flora and fauna, as well as data from laboratory studies of soil samples. An analysis of the morphological composition of the waste and data on the volume and mass of the disposed waste are presented. The level of microbiological, parasitological, and chemical contamination of soil samples with heavy metals is assessed. For carrying out reclamation work at the site, the authors of the work propose a composition that includes natural mineral-organic compounds. The results of the laboratory application of natural mineral-organic compounds with the production of soil-recultivator from the screening of landfill masses are presented.

Keywords: industrial and consumer waste, engineering and environmental surveys, unauthorized dumping, soil pollution, heavy metals, technogenic soil reclamation, reclamation soil

This article presents the results of work on environmental monitoring of the waste disposal facility - a landfill located in the Voroshilovsky district of the city of Volgograd. The data on the territorial and natural features of the research site, such as location, landscape, flora and fauna, are described. The results of the study of soil samples according to the criteria of biological, toxicological and chemical pollution are presented. The question is raised about the possibility of reclamation work using a sorbent based on natural mineral-organic substances, the effectiveness of the sorbent in reducing the hazard class of contaminated soil is shown.

Keywords: production and consumption waste, environmental monitoring, landfill, soil pollution, soil reclamation

This article discusses the results of environmental monitoring of the waste disposal facility located in the northern part of the Traktorozavodsky district of the city of Volgograd. The data on the territorial features of the investigated area, flora and fauna are presented. The morphological composition of wastes present in the soil is analyzed, as well as the results of laboratory studies. The results of studies on the content of heavy metals in the soil (bulk and mobile forms) and data on bacteriology (enterococci, bacteria of the Escherichia coli group, helminths, cysts of pathogenic intestinal protozoa) are shown. The authors put forward recommendations on the methods of reclamation of this territory.

Keywords: production and consumption waste, environmental harm, environmental monitoring, landfill, heavy metal pollution

Arched constructions of the roofs of span-type buildings are very cost-effective in comparison with beam and frame systems. In many cases, the high architectural qualities of arch structures allow one to obtain expressive interiors of large halls. At the same time, the construction of long span buildings is always associated with high risks, high security requirements for such buildings, and, consequently, increased requirements for reliability to load-bearing structures, including possible local destructions. Actual becomes the issue of ensuring the survivability of building structures in general, and the construction of roofs for long span buildings in particular. To analyze the survivability properties of shallow arched coverings, a number of constructive solutions of arched constructions of various types are considered. The work of arch structures of various types with possible local caving of a number of elements is considered. Five design schemes of arched constructions are presented, and work of each of them is considered at exclusion of the most loaded elements. In particular, the work of the arch structure with fan-shaped tie system with a split upper belt is considered. A comparative analysis of the survivability properties of the constructive solutions under consideration is presented.

Keywords: arched covers, arch structure with fan-shaped tie system, survivability, local destruction, constructive solutions, long span roofs, progressive collapse

This article discusses the use of local additives and waste for the production of building materials and products. This topic is very relevant at the present time, since a large amount of waste has been collected all over the world, which occupies huge areas of fertile land and pollutes the environment around us, and we also considered the issue of increasing the quality of concrete by chemicalization.

Keywords: construction, building materials, waste, additives, environmental pollution, ecology, new technology

This paper discusses the results of engineering and environmental surveys on the territory of an unauthorized landfill near the working village of Erzovka, Gorodishchensky district, Volgograd region. In the course of the work, a comprehensive study of the state of atmospheric air, soil and radiation background was carried out. In accordance with the order of the Ministry of Natural Resources and Environment of the Russian Federation dated August 4, 2017 No. 435 "On the approval of the criteria and term for categorizing objects, the accumulated damage to the environment on which is subject to liquidation as a matter of priority", the study area was categorized. The data on the mass, morphological composition and hazard class of wastes located in the study area are presented. The results of a laboratory study of environmental pollution by production and consumption wastes are presented, and the accumulated environmental harm is assessed.

Keywords: unauthorized landfill, accumulated environmental damage, production and consumption waste, pollutants, heavy metal pollution, level of negative impact

This article presents the results of the study of pollution of components of the natural environment (air, soil, water) and wastes located in the territory of the landfill near the village of Samofalovka, Volgograd region, and carried out an assessment of the accumulated environmental damage.

Keywords: Landfill, accumulated environmental damage, pollutants, exposure level