TY JOUR TI TECHNOLOGY FOR PRODUCING COMPOSITE GLASS-CRYSTAL FACING MATERIALS BASED ON MIXED CULLET KW mixed cullet KW porcelain cullet KW sodium liquid glass KW sintering KW polytherms of viscosity KW compressive strength JO Bulletin of Belgorod State Technological University named after. V. G. Shukhov AU Bondarenko, N.I. AU Puchka, O.V. AU Bessmertnyy, V.S. AU Chuev, S.A. AU Izotova, I.A. AU Bragina, L.L. AU Yalovenko, T.A. PY 2020 IS 5 PB Belgorod State Technological University named after V.G. Shukhov