SILICA GLASS Russian patent published in 2000 - IPC

FIELD: building materials industry, more particularly manufacture of facing plates with high physico-mechanical properties for protection of building structures and production equipment from water and radiation. SUBSTANCE: silica glass comprises, as glass granulate, optical glass waste and additive which includes glass waste resulting from chemical polishing of glass, ratios of components being as follows, wt %: optical glass waste, 85-95: waste resulting from chemical polishing of glass, 5-15. EFFECT: higher hardness, density and wider range of raw materials. 2 tbl