SLAG-DEVITRIFIED GLASS Russian patent published in 1994 - IPC

FIELD: building materials. SUBSTANCE: slag-devitrified glass has, wt.-% : silicon oxide (54,0-55,0 БФ SiO₂) 54-55; aluminium oxide (8,3-9,0 БФ Al₂O₃) 8.3-9.0; calcium oxide (CaO) 17.0-17.7; magnesium oxide (MgO) 1.0-2.1; ferric (III) oxide (10,2-11,0 БФ Fe₂O₃) 10.2-11.0; chrome oxide (0,4-0,8 БФ Cr₂O₃) 0.4-0.8; ferrous (II) oxide (FeO) 1-3, and potassium oxide (1,6-3,0 БФ K₂O) 1.6-3.0. Properties of slag-devitrified glass: waterproof is 99.5-99.7%, softening point is 900-1000 C. Material is used for wall facing. EFFECT: enhanced quality of material. 1 tbl