The stoichiometry in the paste hydration of 038, alite and (beta)-C2S cured at 5, 25 and 5(degree)C

The stoichiometry of the hydration process in the hardened paste ofCjS, alite and ft-C^S was investigated on the basis of surface area and crystal structure data calculations of the CSH-gel. The chemical compound of calcium silicate hydrate forming in the paste hydration of C;S, alite and ft-CiS cured at 5, 25 and 50°C has a definite and stable composition during the whole hydration period, corresponding to the formula QiS^^.