TY JOUR TI INCREASING THE PERFORMANCE CHARACTERISTICS OF GYPSUM COMPOSITE FOR DECORATIVE PRODUCTS KW gypsum stone KW modification KW additives KW polyvinyl acetate KW synthetic fiber JO Bulletin of Belgorod State Technological University named after. V. G. Shukhov AU Mokrova, M.V. AU Sardarova, S.A. PY 2023 IS 8 PB Belgorod State Technological University named after V.G. Shukhov