Calcium silicate hydrates investigated by solid-state high resolution 1H and 29Si nuclear magnetic resonance

Fabienne Meducin (1) , B. Bresson (2) , N. Lequeux (3) , Marie-Noëlle de Noirfontaine (4) , H. Zanni (1)

1 PMMH - Physique et mécanique des milieux hétérogenes (UMR 7636)
2 LPQ - Laboratoire de Physique Quantique
3 PPMD - Laboratoire de Physico-Chimie des Polymères et des Milieux Dispersés
4 UMR GESTE - Gestion Territoriale de l'Eau et de l'environnement

This work focuses on phases formed during cement hydration under high pressure and temperature: portlandite Ca(OH)2 (CH); hillebrandite Ca2(SiO3)(OH)2 (β‐dicalcium silicate hydrate); calcium silicate hydrate (C–S–H); jaffeite Ca6(Si2O7)(OH)6 (tricalcium silicate hydrate); α‐C2SH Ca2(SiO3)(OH)2 (α‐dicalcium silicate hydrate); xonotlite Ca6(Si6O17)(OH)2 and kilchoanite Ca6(SiO4)(Si3O10). Portlandite and hillebrandite were synthesized and characterised by high resolution solid-state 1H and 29Si Nuclear Magnetic Resonance. In addition, information from the literature concerning the last five phases was gathered. In certain cases, a schematic 3D‐structure could be determined. These data allow identification of the other phases present in a mixture. Their morphology was also observed by Scanning Electron Microscopy.

Mots clés: Hydration products; X-ray diffraction; X‐ray diffraction; Spectroscopy; Scanning Electron Microscopy; Temperature

Domaines: Physique [physics]; Matériaux; Cristallographie

Fabienne Meducin, B. Bresson, N. Lequeux, Marie-Noëlle de Noirfontaine, H. Zanni. Calcium silicate hydrates investigated by solid-state high resolution 1H and 29Si nuclear magnetic resonance. Cement and Concrete Research, 2007, 37, pp.631-638. ⟨10.1016/j.cemconres.2007.01.011⟩. ⟨hal-00165017⟩