Abstract
The article presents the results of geopolymer technology development and a study of the performance of lightweight concrete based on a porous aggregate. The purpose of the study is to identify the transformations in composition and structure during the formation and operational testing of porous geopolymer concrete. The porous aggregate and binder are synthesized from molding mixtures of related composition containing sodium liquid glass and finely dispersed from thermal power plants' waste (fly ash and aluminosilicate microsphere). A thermal curing mode for concrete is proposed to ensure the formation of a porous structure with satisfactory resistance to mechanical stress and water. Phase transformations are studied during thermal synthesis of geopolymer material, with prolonged exposure of concrete to water and solutions of magnesium sulfate and sodium. Preliminary economic calculations are performed, indicating the advantages of porous geopolymer concrete compared to cement concrete based on expanded clay. The porous concrete based on geopolymer binder is intended for the production of energy-efficient wall products.