Abstract
This work focuses on phases formed during cement hydration under high pressure and temperature: portlandite Ca(OH) 2 (CH); hillebrandite Ca 2(SiO 3)(OH) 2 (β‐dicalcium silicate hydrate); calcium silicate hydrate (C–S–H); jaffeite Ca 6(Si 2O 7)(OH) 6 (tricalcium silicate hydrate); α‐C 2SH Ca 2(SiO 3)(OH) 2 (α‐dicalcium silicate hydrate); xonotlite Ca 6(Si 6O 17)(OH) 2 and kilchoanite Ca 6(SiO 4)(Si 3O 10). 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.
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