TY JOUR TI STUDY OF THE INFLUENCE OF MODIFIED ADDITIVES ON THE PROPERTIES OF CONCRETE KW : fine-grained concrete KW modifying additives KW physical and mechanical properties KW strength KW deformability JO Bulletin of Belgorod State Technological University named after. V. G. Shukhov AU Ledyaykina, O.V. AU Ledyaykin, N.V. PY 2024 IS 9 PB Belgorod State Technological University named after V.G. Shukhov