TY JOUR TI INVESTIGATION OF THE PROPERTIES OINVESTIGATION OF THE PROPERTIES OF CLAY RAW MATERIALS BY METHODS OF PHYSICO-CHEMICAL ANALYSIS KW clay raw material KW physicochemical analysis KW physico-mechanical KW chemical and technological properties JO Bulletin of Belgorod State Technological University named after. V. G. Shukhov AU Ushnickaya, H.N. AU Mestnikov, A.E. PY 2024 IS 9 PB Belgorod State Technological University named after V.G. Shukhov