TY JOUR TI EFFICIENCY OF SUPERPLASTICIZERS IN FINE-GRAINED CONCRETE WITH ASH AND SLAG MIXTURE KW fine-grained concrete KW ash and slag mixture KW superplasticizers KW strength KW efficiency JO Bulletin of Belgorod State Technological University named after. V. G. Shukhov AU Lukutcova, N.P. AU Pykin, A.A. AU Golovin, S.N. AU Dudnik, A.V. AU Zolotuhina, N.V. PY 2024 IS 9 PB Belgorod State Technological University named after V.G. Shukhov