Abstract
Compositions and methods for fabricating highly porous siliceous (SiO2 > 90%) foam concretes based on HCBS of quartz sand and additives of liquid glass and slags of ferrochrome production are described. Molding systems in the form of mineralized foams are self-solidifying and have a relatively low moisture content. In the process of molding and drying the material does not practically shrink. Foam concretes with a porosity of 65–75% are characterized by an ultimate compressive strength of 0.8–1.2 MPa which attains 5–15 MPa after the heat treatment. The maximum service temperature of such concretes is 1200–1300°C.
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