Interaction of water vapour with anhydrous cement minerals

E. Dubina, L. Black, R. Sieber, J. Plank

Research output: Contribution to journalArticlepeer-review

49 Scopus citations

Abstract

Abstract The prehydration of industrial cements (CEM I 52·5 R and API Oilwell Class G) and pure cement clinker minerals (C3S, cubic C3A, orthorhombic C3A, C4AF) has been studied at 60 and 85% relative humidity using in situ X-ray diffraction (XRD), calorimetry, environmental scanning electron microscopy and X-ray photoelectron spectroscopy. This combination of techniques identifies the key components involved in the surface prehydration process. Prehydration of cement leads to dramatic retardation of hydration. in situ XRD shows the retardation of portlandite formation after prehydration, supporting the calorimetry results. X-ray photoelectron spectroscopy and ESEM investigations show surface modification after prehydration for C3S, C3A and doped C3A (4%Na2O). Prehydration of cement leads to modification of the surface area and surface charge, which can strongly influence the reactivity of bulk cements. This is relevant to the quality of cement during storage.

Original languageEnglish
Pages (from-to)260-268
Number of pages9
JournalAdvances in Applied Ceramics
Volume109
Issue number5
DOIs
StatePublished - 1 May 2010
Externally publishedYes

Keywords

  • Prehydration
  • Retardation
  • XPS

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