Application of Ash and Slag Waste in the Building Materials Industry

Abstract

the article presents the results of a study of the prospects for the use of ash and slag waste generated during the combustion of coal at thermal power plants in the production of concrete. It has been established that the inclusion of ash in the concrete mixture leads to a reduction in the cost of produced building materials, saving natural resources, and increasing the strength and frost resistance of structures. the use of ash and slag waste in the mixture, tak ing into account the calcium oxide (CaO) content, made it possible to classify the resulting mixture for the production of heavy and light concrete. When determining the composition of the mixture, the necessary characteristics were the strength of the resulting product, frost resistance, and resistance to cracking under the influence of external loads, such as compression, ten sion, and cooling. An analysis of the work of russian and foreign scientists on the production of heavy and lightweight concrete using an ash and slag mixture formed during the combustion of coal was carried out. the chemical composition of fly ash is presented, which made it possible to determine the ratio of this filler in the concrete mixture. KeywordsCoal combustion, Ash and slag waste, thermal power plants, thermal effi ciency, high-calcium ash, fly ash, Particle size distribution, Economic turnover, resource saving. For citationAstafyeva O.E. Application of ash and slag waste in the building materials industry. Ugol' , 2024, (2), pp. 85-88. (In russ.).