TY JOUR TI THEORETICAL AND METHODOLOGICAL BASIS OF CREATING POLYFUNCTIONAL MODIFIERS OF MASS CONCRETES FOR RECONSTRUCTION WORKS KW polyfunctional modifiers KW mass concrete KW concrete mix KW colloid-chemical properties KW synergism effect KW high-strength concrete KW longevity of concrete KW high-slump and flow concrete mixes KW electrolytes KW sur-face-active substance KW hardening accelerators KW plasticizing activity KW rheological properties KW adsorption KW electrokinetic potential KW aggregative stability. JO Bulletin of Belgorod State Technological University named after. V. G. Shukhov AU Kosukhin, M.. AU Kosukhin, A.. PY 2017 IS 2 PB Belgorod State Technological University named after V.G. Shukhov