TY JOUR TI IMPROVING THE EFFICIENCY OF CONCRETE THROUGH THE APPLICATION OF ADDITIVES OF VARIOUS NATURE KW concrete efficiency KW additives KW binders KW hardening mechanism KW formation of new phases KW hydration JO Bulletin of Belgorod State Technological University named after. V. G. Shukhov AU Botsman, L.N. AU Strokova, V.V. AU Ischenko, A.. AU Bocman, A.. PY 2016 IS 1 PB Belgorod State Technological University named after V.G. Shukhov