Production of aerated concrete blocks using energy-efficient technology

Abstract

This article studies the problems of producing aerated concrete blocks using energy-saving technology and ways to overcome them. Aerated concrete products are distinguished by their lightness, low thermal conductivity compared to traditional concrete, and the ability to effectively recycle industrial waste. The article analyzes the influence of the structure of pores in aerated concrete, their diameter and uniformity, on thermal conductivity and strength properties. The results of the study show that aerated concrete produced using industrial waste contains uniformly distributed closed pores, which reduce the thermal conductivity of aerated concrete by 2–4.5% and increase its strength by 7–12%. At the same time, the use of cold water without adding hot water to the mixture, and the technology of covering the mold and sending it to evaporation chambers are recommended. These methods are energy-efficient, simplify the technological process, and increase the quality and environmental safety of the product. The research also shows the possibility of improving the physical and mechanical properties of two- and three-layer aerated concrete blocks with a dense surface layer. They have high potential in terms of recycling industrial waste, heat conservation, technological simplicity, and environmental sustainability.