TY JOUR TI HIGH-STRENGTH GYPSUM-ASH COMPOSITIONS KW gypsum KW composition KW binder KW waste KW dry removal ash KW calcium KW free lime JO Technique and technology of silicates AU Petropavlovskii, K.S. AU Kalyaskin, P.A. AU Petropavlovskaya, V.B. AU Novichenkova, T.B. AU Korovitsyn, D.A. PY 2026 IS PB Individual Entrepreneur Svetlana Vasilievna Samchenko