TY JOUR TI THE ROLE OF Na+, K+, Ca2+, NH4+ SULFATES-BASED DOUBLE SALTS IN DERIVATION OF ANHYDRITE BINDERS KW double salts KW insoluble anhydrite KW gypsum KW construction gypsum KW syngenite KW koktaite KW hydroglauberite KW glauberite KW pore colmatation KW XRF KW pH JO Bulletin of Belgorod State Technological University named after. V. G. Shukhov AU Klimenko, V.. PY 2017 IS 2 PB Belgorod State Technological University named after V.G. Shukhov