TY JOUR TI BUILDING CERAMICS REINFORCED WITH FIBERGLASS FROM WASTE FROM MINERAL WALLPAPER RECYCLING KW clay raw materials KW semi-dry pressing KW volume reinforcement KW fiberglass KW strength JO Bulletin of Belgorod State Technological University named after. V. G. Shukhov AU Ushnitskia, N.N. AU Mestnikov, A.E. PY 2026 IS 11 PB Belgorod State Technological University named after V.G. Shukhov