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Abstract
Concern for the sustainable management and recycling of solid waste is becoming more visible in all sectors of the economy. This study explores the possibility of using coal ash residue (waste from Kazan CHPP-2) as a substitute for fine-grained aggregate in sulfur concrete. The trend towards an increase in the level of utilization of waste heat power engineering is an important task. The chemical composition, microstructure and mechanical properties, including density, water absorption, compressive strength and thermal conductivity of sulfur concrete, including coal ash with partial and complete sand replacement, were investigated and the results were compared with those for standard cellular concrete. The authors studied modern heat-insulating materials and materials from industrial waste products. The article analyzes the estimated thickness of the insulating material depending on the type of structure. Outside walls made of sulfur concrete, in addition to high strength properties, have high thermal and economic performance.
Highlights
Worldwide, waste production continues to grow due to the constant demand for resources used by people, and this is considered one of the most serious environmental problems we face
After coal is burned in the furnace of a coal-fired power plant, smaller particles of non-combustible ash are recovered in electrostatic precipitators
Coal ash collected from electrostatic precipitators and from the bottom of the furnace is called fly ash and coal bottom ash, respectively [3]
Summary
Waste production continues to grow due to the constant demand for resources used by people, and this is considered one of the most serious environmental problems we face. Certain types of waste can be incorporated into concrete either as part of the cement mix or as aggregate. This helps to improve the sustainability of building materials. Some industrial wastes or by-products have been successfully disposed of in this way, including the bottom ash of coal used as a component in the production of Portland cement. After coal is burned in the furnace of a coal-fired power plant, smaller particles of non-combustible ash are recovered in electrostatic precipitators. Efficient utilization of ash and slag waste from coal-fired power plants can significantly reduce the negative impact on the environment and improve their economic performance [4]. Only a limited number of studies have been carried out on the use of bottom ash from coal as a partial replacement for Portland cement or as a partial replacement for a small unit [8]
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