TY JOUR TI LIGHTWEIGHT CONCRETE ON A POROUS AGGREGATE AND A COMPOSITE BINDER USING NATURAL ZEOLITE KW lightweight concrete KW composite binder KW zeolite KW porous aggregate KW ash slag JO Bulletin of Belgorod State Technological University named after. V. G. Shukhov AU Petrov, A.A. AU Popov, A.L. AU Fedorov, A.V. PY 2025 IS 10 PB Belgorod State Technological University named after V.G. Shukhov