Investigation of refractory concrete materials with alumosilicate composition by petrographic methods

Petrographic methods are used to investigate concrete alumosilicate materials, produced by the Semiluki Refractory Works, on fireclay fill and an integral binder based on high-alumina cement. The microscopic investigations showed that as the result of heat treatment of concrete up to 380°C degradation processes are essentially completed in the binding substance, and formation of a glass phase, mullitization, and binder penetration into the fireclay fill are observed in samples calcined at 1000°C. After calcination the phase composition of the binder obtained from synthetic materials is similar to the composition of the clay binder used in conventional fireclay calcination materials.[PUBLICATION ABSTRACT]