TY JOUR TI DEVELOPMENT OF TECHNOLOGY FOR PRODUCTION OF EXPANDED GRAVEL BY SEMI-DRY METHOD USING TECHNOGENIC WASTE AND LOW PLASTIC RAW MATERIALS KW expanded clay gravel KW molding methods KW clay KW pyrite cinders KW dust removal from the electrostatic precipitator of expanded clay production KW bulk density JO Bulletin of Belgorod State Technological University named after. V. G. Shukhov AU Trepalin, D.V. AU Mishin, D.A. AU Trepalina, Y.N. AU Kovalev, S.V. PY 2025 IS 10 PB Belgorod State Technological University named after V.G. Shukhov