TY JOUR TI INFLUENCE OF MINERAL ADDITION ON THE HYDRATION AND THE HARDENING OF ASH-CEMENT STONE DURING HEAT AND STEAM CURING KW fly ash KW mineral additive KW ash-cement stone KW hydration KW strength JO Bulletin of Belgorod State Technological University named after. V. G. Shukhov AU Fomina, I.V. AU Kapustin, F.L. PY 2024 IS 9 PB Belgorod State Technological University named after V.G. Shukhov