TY JOUR TI EFFECT OF GYPSUM ADDITIVE ON QUALITY OF COMPOSITIONAL BINDING MATERIALS CELLULAR STRUCTURE KW lime activity KW gypsum modification KW compositional binder KW cellular structure KW autoclave treatment JO Bulletin of Belgorod State Technological University named after. V. G. Shukhov AU Kudeyarova, N.P. AU Ozherel'eva, A.Y. PY 2019 IS 4 PB Belgorod State Technological University named after V.G. Shukhov