TY JOUR TI FFOAM CONCRETE BASED ON GLASS-ALKALI BINDING KW glass-alkali binder KW foaming agents KW manufacturing technology KW foam concrete composition KW test results KW thermal conductivity KW sorption humidity JO Bulletin of Belgorod State Technological University named after. V. G. Shukhov AU Voroncov, V.M. AU Yaremchuk, M.V. AU Lesovik, R.V. PY 2026 IS 11 PB Belgorod State Technological University named after V.G. Shukhov