ECONOMIC EFFICIENCY OF USING DISPERSED ALUMINOSILICATE WASTE IN REFRACTORY CELLULAR PHOSPHATE CONCRETE TECHNOLOGY

Abstract

A refractory cellular phosphate concrete based on fireclay filler using dispersed aluminosilicate waste (fireclay production waste) with an application temperature of 1500 °C and an average density of 600–800 kg/m3 has been developed. During the development process, the impact of these waste materials on the their costs in the production of cellular phosphate concrete has been studied. The dispersed waste materials are used as a component in binder production and as a partial replacement for small fractions of fireclay fillers. The purpose of this work is to clarify the heat-resistant properties of cellular concrete using dispersed aluminosilicate waste and to determine the level of cost reduction of the developed material compared to its closest analogues (cellular concrete using an aluminophosphate binder and fireclay fillers). The study uses standard methods for the investigation of refractory concrete according to GOST 20910. The economic efficiency is assessed based on the average price of the raw materials used in the Chelyabinsk Region in the second quarter of 2025. The main properties of the developed concrete were investigated, and it was shown that it is not inferior to concrete made from traditional raw materials. A preliminary assessment of the economic efficiency of the developed aerated concrete has been conducted. It has been found that even partial replacement of the components used with refractory concrete and fireclay production waste can reduce the cost of materials by up to 19%.