TY JOUR TI IMPROVING THE EFFICIENCY OF MORTARS OF DOMESTIC PRODUCTION KW сement-polymer compositions KW modification of mortars KW water-soluble polymers JO Bulletin of Belgorod State Technological University named after. V. G. Shukhov AU Onoprienko, N.N. AU Sal'nikova, O.N. PY 2019 IS 4 PB Belgorod State Technological University named after V.G. Shukhov