Effect of the Addition of Perlite on the Physical, Mechanical and Thermal Properties of Refractory Insulating Concrete

摘要

The effect of the addition of perlite with four different particle sizes of grog on the properties of insulating refractory concrete (IRC) was investigated. Water absorption and porosity were found to increase with the increase in the perlite level and to decrease with the level of cement added. The bulk density, the mechanical strength and the thermal conductivity generally decreased with an increase of porosity. Thermal conductivity was correlated to the fraction of perlite and that of cement used. It was possible to design a mix that produces IRC having comparable properties to a locally produced brand, in Egypt, at a lower cost.