Free Access
Issue
J. Chim. Phys.
Volume 95, Number 2, February 1998
Page(s) 327 - 331
DOI https://doi.org/10.1051/jcp:1998140
DOI: 10.1051/jcp:1998140


J. Chim. Phys. Vol. 95, N°2  p. 327-331

Pressure and temperature influence on tricalcium silicate hydration. A 1H and 29Si NMR study

B. Bresson and H. Zanni

Laboratoire de Physique et Mécanique des Milieux Hétérogènes, URA 857 du CNRS, ESPCI, 10 rue Vauquelin, 75231 Paris cedex 05, France

Abstract
Hydration of tricalcium silicate with and without ground quartz, at high temperature (12 °-16 °C) and high pressure (1000 bars), has been studied by 29Si and 1H 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.

Résumé
L'hydratation du silicate tricalcique avec et sans quartz broyé, à haute température (12 °C-16 °C) et haute pression (1000 bars) a été étudiée par RMN du 29Si et du proton (CRAMPS). La polarisation croisée, utilisée avec des temps de contact longs, permet de séparer les hydrates cristallins des hydrates mal cristallisés et de détecter des traces de ces cristaux. Elle permet également d'étudier l'influence de la pression.


Key words: Tricalcium silicate hydration -- NMR -- temperature -- pressure
Contents

© EDP Sciences 1998

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