FINE-GRAINED CONCRETE BASED ON WASTE FROM THERMAL POWER PLANTS AND METALLURGICAL ENTERPRISES EAST KAZAKHSTAN REGION

Abstract

The relevance of industrial processing of waste from thermal power engineering and mining and metallurgical complex (MMC) enterprises in order to obtain effective concrete is due to the need to obtain building materials with improved characteristics and low cost, on the one hand, and the problem of catastrophic volumes and condition of man-made waste stored in the East Kazakhstan region, - with another. The purpose of the article is to analyze methods for producing effective fine-grained concrete solutions with the addition of waste from thermal power engineering and mining enterprises located in Eastern Kazakhstan. The article describes the features and scope of application of fine-grained concrete mortars. The need, possibilities and prospects for using technogenic waste for the production of building materials, products and structures have been studied. Compositions of fine-grained concrete were selected based on technogenic raw materials - ash and slag waste and metallurgical slag. The study showed that the introduction of fly ash and metallurgical slag into concrete improves the physical and mechanical properties of products with significant savings in cement. The applicability of the studied technogenic raw materials in fine-grained concrete has been proven, resulting in a wide range of applications for the material. The study showed that based on the obtained indicators of strength, frost resistance, abrasion, corrosion resistance, resistance to alternate wetting and drying and other improved characteristics, these concretes can be recommended for the production of small-piece concrete products (curbs, artificial paving stones, paving slabs, side stones, facing slabs, concrete tiles, etc.) and in road construction. The mobility of fine-grained concrete mortar allows it to be used for sealing seams and cracks in monolithic concrete and in the installation of reinforced cement structures, including large ones. A significant environmental effect from the processing of technogenic deposits in the East Kazakhstan region is shown.