Donbas National Academy of Civil Engineering and Architecture

This study summarizes the basic environmental and technical problems, connected with current strategy of recovery of usable materials from ash and slag waste (ASW) of coal-fired power plants. The directions of complex utilization of ASW have been elaborated. In accordance with X-ray diffraction analysis it was determined that the predominant phase of slag component of ASW is an amorphous silicate glass and almost all aluminum oxide is in the amorphous phase. This is a decisive factor in the solubility of aluminum oxide in alkaline solutions and the synthesis of water-resistant hydroaluminosilicates of the R2O⋅Al2O3⋅(2–4)SiO2⋅nH2O type. Thus, a new direction for the application of the slag component of ASW (in a milled state) might be used as a precursor of geopolymer binders. It has been established that heat treatment increases the compressive strength of the geopolymer binder based on ponded ash as well as on milled slag. Both types of binders show the greatest activity after autoclave treatment. Compared to steamed samples, compressive strength increases by 1.8 times, up to 27 MPa for fly ash based binder and up to 60 MPa for milled slag based binder. The result of dry triboelectrostatic separation of ponded ash containing a high percentage of unburned carbon is the production of beneficiated pozzolanic additive for concrete, characterized by improved granulometric and phase composition. It is the way to use the beneficiated ponded ash in formulations of High-Volume Fly Ash Concrete. Besides, the results obtained indicate that the part of ponded ash remained after the beneficiation process contains a high percent of unburned carbon and has a high capacity to adsorb and remove various pollutants from water, in particular phosphates.

The paper provides a retrospective analysis of vegetation on the waste rock dump of Dimitrov coal mine No. 5-6, Donetsk, DPR. The data on the state of vegetation cover in 1977–2010 and 2011–2024 are taken as a basis, which is methodically justified in evaluating results from the first experimental planting of annual and perennial plants as well as the process of the dump colonization with alien species. A close positive correlation is found between the increase in the number of plant species and duration of the reclamation period, which is reflected in the phytodiversity of the waste rock dump during coal mining in Donbas and contributes to the formation of the dump as an established ecotope.

The article examines the application of the sectoral approach in managing the territorial real estate markets of the Russian Federation. The authors consider land resources as a strategic asset, taking into account their use in various sectors: agriculture, industry, forestry, and water management. The paper highlights the need to integrate quantitative and qualitative assessment parameters, such as the proportion of land categories, profitability levels, and environmental sustainability, to enhance management efficiency. Special attention is given to the development of a rating system that assesses the effectiveness of regional land resource use, identifies leading and lagging territories, and supports the formation of regionally oriented strategies. The purpose of the study is to explore the applicability of the sectoral approach to the management of assets in territorial real estate markets, including land plots with specific quantitative and qualitative parameters. Additionally, the study aims to identify directions for the development of the land management system as it pertains to real estate assets in the regions of the Russian Federation. The practical significance of the research lies in the development of tools to optimize land use structures, increase transparency in management processes, and attract investment into territorial real estate markets. The approaches proposed in the article can also be applied in developing systems for monitoring the effectiveness of land management, facilitating the creation of databases for analysis, forecasting, and strategic decision-making at various levels of governance. The study’s findings can contribute to the development of comprehensive strategies for the sustainable development of territories, enhancing their investment attractiveness, and strengthening the socio-economic potential of the regions. / Статья посвящена исследованию применения секторного подхода в управлении территориальными рынками недвижимости Российской Федерации. Авторы рассматривают земельные ресурсы как стратегический актив, использование которого учитывает специфику различных секторов: сельскохозяйственного, промышленного, лесного и водного. В работе акцентируется внимание на необходимости интеграции количественных и качественных параметров оценки, таких как удельный вес земельных категорий, уровень доходности и экологическая устойчивость, для повышения эффективности управления. Особое внимание уделяется разработке рейтинговой системы, которая позволяет оценивать эффективность использования земельных ресурсов регионов, выявлять лидеров и отстающие территории, а также формировать регионально ориентированные стратегии. Цель исследования заключается в изучении возможности применения секторного подхода в управлении объектами на территориальных рынках недвижимости, в том числе земельными участками с определенными количественными и качественными параметрами, а также в выявлении направлений развития системы управления земельными участками как объектами недвижимости в регионах Российской Федерации. Практическая значимость исследования заключается в разработке инструментов для оптимизации структуры землепользования, повышения прозрачности процессов управления и привлечения инвестиций в территориальные рынки недвижимости. Предложенные в статье подходы также могут быть использованы при создании систем мониторинга эффективности управления земельными ресурсами, формировании баз данных для анализа, прогнозирования и принятия стратегических решений на различных уровнях управления. Результаты исследования могут быть полезны для разработки комплексных стратегий устойчивого развития территорий, повышения их инвестиционной привлекательности, а также для укрепления социально-экономического потенциала регионов.

In the Russian Federation, there is a growing number of tank batteries requiring major repairs to outdoor structures. Insufficient regulatory framework for design and construction of such structures leads to the need to apply standards for the design of anti-filtration screens of landfills for toxic waste disposal, which significantly reduces the efficiency of design and construction, without guaranteeing sufficient reliability. At the design stage of outdoor structures, it is necessary to take into account various loads. The analysis of Russian and foreign studies of structural solutions for open-air tank batteries shows insufficient development of snow load calculation methods that take into account the specifics of snow deposition at sites, especially in the northern regions of the Russian Federation. The lack of adequate assessment of this factor in combination with other loads (e.g., a spill of petroleum products) can lead to uneven deformation of the load-bearing structural element and potentially dangerous consequences, including environmental risks. This determines the relevance of the study. Purpose: Verification of the methodology for choosing a constructive solution for open areas of tank batteries in the city of Salekhard, the thickness determination of the bearing element and feasibility study of the chosen site design. Methodology: The integrated approach, determination of the total load on the construction of open areas, taking into account the layout of reservoirs within the park. Research findings: The method of choosing rational constructive solutions is proposed for open areas of tank batteries. Based on this method, determined are the thickness of the bearing element, the labor intensity and cost of implementation of the constructive solution of the open areas of tank batteries with regard to different tank layout in Salekhard.

The possibility of regulating the curing rate and the complex of adhesive and deformation-strength properties of adhesive materials based on diphenylolpropane thioglycidyl ether (thiirane) has been studied as depending on the chemical nature of amine hardeners, as well as on the composition and ratio of components in curing agents based on their mixtures. The following have been used as initial hardeners: diethylenetriamine of the DETA brand, diethylenetriaminomethylphenol of the UP-583 brand, and aminopolyamide of the PO-300 brand. The ratio of the components of the mixed hardener has been selected to provide the best complex of adhesive and deformation-strength properties. It has been shown that, at the initial stage of curing, the compositions containing the mixed hardener significantly exceed the compositions cured by individual components of the mixture in terms of cohesive strength.