TY JOUR TI THE EFFECT OF SUPERPLASTICIZER SP-2VU ON CONSTRUCTION AND ENGINEERING PROPERTIES OF CONCRETE KW superplasticizers KW additive SP-2VU; cement mortars KW concrete additives KW concrete manufacturing technology KW concrete modification KW concrete properties JO Bulletin of Belgorod State Technological University named after. V. G. Shukhov AU Vinogradova, L.A. AU Rusakova, Y.P. PY 2019 IS 4 PB Belgorod State Technological University named after V.G. Shukhov