TY JOUR TI THERMODYNAMIC ANALYSIS OF TRICALCIUM SILICATE HYDRATION KW tricalcium silicate KW hydrosilicates KW thermodynamics KW enthalpy KW Gibbs free energy KW ion activity and con-centration KW specific heat release JO Bulletin of Belgorod State Technological University named after. V. G. Shukhov AU Rahimbaev, S.M. AU Onoprienko, N.N. AU Sal'nikova, O.N. PY 2021 IS 6 PB Belgorod State Technological University named after V.G. Shukhov