Inorganic Thermofoam Silicate Vitrified Materials Based on Silica-Containing Technogenic Raw Materials

Abstract—The possibility of synthesizing inorganic thermofoam silicate vitrified materials from technogenic and natural raw materials has been studied and substantiated. Compositions and modes for obtaining quality products have been selected. On the basis of microsilica and nepheline concentrate with the addition of chalk and gypsum, thermofoam silicates with a density of 0.49–0.52 g/cm³, a strength of 2.7–3.10 MPa, a reduced thermal conductivity of 0.059–0.062 W/(m K), and a water absorption of 12–18% have been synthesized.