TY JOUR TI THE EFFECT OF THE HYDROTHERMAL TREATMENT METHOD ON OPERATIONAL CHARACTERISTICS OF SILICATE MATERIALS BASED ON CLAY AND VOLCANIC ASH KW Debub loam deposit KW volcanic ash KW autoclave and non-autoclave technology KW silicate materials JO Bulletin of Belgorod State Technological University named after. V. G. Shukhov AU Ghebremedhin, K.W. AU Volodchenko, A.N. AU Shapovalov, N.A. PY 2026 IS 11 PB Belgorod State Technological University named after V.G. Shukhov