Ceramics-Silikáty 53 (2) 76-80 (2009)

DETERMINATION OF Ca²⁺ IONS AT EARLY STAGE OF HYDRATING CEMENT PASTE

Š. Hošková, P. Tichá, P. Demo

Novel procedure to determine instantaneous concentrations of Ca²⁺ ions in hydrating cement paste is suggested. Using EDTA and following indirect Ca²⁺ determination titrated with Mg²⁺ ions in Schwarzenbach buffer medium allows to determine calcium ion concentrations for different times.

Keywords: Hydrating cement paste, Early stage of hydration, Concentration of free Ca²⁺ ions