TY JOUR TI SELF-STRENGTHENED GYPSUM COMPOSITIONS BASED ON FLY ASH KW gypsum compositions KW fly ash KW waste from thermal power plants KW structure KW hardening KW reinforcement JO Technique and technology of silicates AU Petropavlovskii, K.S. AU Kalyaskin, P.A. AU Petropavlovskaya, V.B. AU Novichenkova, T.B. PY 2024 IS 31 PB Individual Entrepreneur Svetlana Vasilievna Samchenko