TY JOUR TI THE EFFECT OF MICRO-FILLERS ON THE EFFECTIVENESS OF SUPERPLASTICIZERS AND THE STRENGTH OF LOW-CEMENT CONCRETES KW superplasticizer KW low-cement concrete KW water-reducing ability KW strength KW concrete mix KW concrete JO Bulletin of Belgorod State Technological University named after. V. G. Shukhov AU Tolypina, N.M. AU Hahaleva, E.N. AU Danilov, D.Y. AU Chashin, D.Y. PY 2023 IS 8 PB Belgorod State Technological University named after V.G. Shukhov