TY JOUR TI UTILIZATION OF GYPSUM-BEARING WASTES IN MATERIALS OF THE CONSTRUCTION INDUSTRY AND OTHER AREAS KW gypsum-bearing wastes KW phosphogypsum KW borogypsum; citrogypsum KW gypsum α-hemihydrate KW gypsum β-hemihydrate KW cement KW mortars JO Construction Materials and Products AU Alfimova, N.I. AU Pirieva, S.Y. AU Titenko, A.A. PY 2021 IS 4 PB Belgorod State Technological University named after V.G. Shukhov