S EDP Sciences. Les Ulis Pressure and temperature influence on tricalcium silicate hydration.

Hydration of tricalcium silicate with and without ground quartz, at high temperature (120°C-160 °C) and high pressure (1000 bars), has been studied by 2 9 Si and 'H CRAMPS NMR. Cross-polarization, for long contact times, allows to separate crystalline phases from poorly crystallized hydrates and to detect small amounts of the crystalline phases. The influence of pressure is also studied by cross- polarization. key words: Tricalcium silicate hydration, NMR, temperature, pressure