Age-dependent dynamics of water in hydrated cement paste

Abstract

Self-dynamics of water molecules has been studied in hydrated tricalcium silicate as functions of temperature, aging, and in the presence of an additive. A dynamical model taking into account the existence of “immobile water” and “glassy water” has been used to analyze quasielastic neutron spectrometer spectra. We deduced the fraction of the immobile water $\mathrm{}\left(p\right),$ the stretch exponent $\left(\beta \right),$ and the average relaxation time $\left(\overline{\tau }\right)$ of the glassy water. A quantitative picture for an aspect of the kinetics of the curing process and the structural relaxation parameters of the glassy water have been established.