TY JOUR TI ASSESSMENT OF THE INFLUENCE OF FINE GROUND SLAG ON THE PROPERTIES OF COMPOSITE GYPSUM BINDING AGENT KW finely ground slag KW specific surface KW active centers KW composite gypsum binder JO Bulletin of Belgorod State Technological University named after. V. G. Shukhov AU Chernysheva, N.V. AU Borisov, I.S. AU Sardarbekova, E.K. AU Drebezgova, M.Y. AU Ageeva, M.S. PY 2025 IS 10 PB Belgorod State Technological University named after V.G. Shukhov