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Characterising the Reaction of Metakaolin in an Alkaline Environment by XPS, and Time- and Spatially-Resolved FTIR Spectroscopy

  • John L. ProvisEmail author
  • Syet Li Yong
  • Jannie S. J. van Deventer
Conference paper
Part of the RILEM Bookseries book series (RILEM, volume 10)

Abstract

The process of the dissolution of metakaolin in an alkaline environment remains incompletely understood; there are many mechanistic details which still require elucidation. Here, we apply X-ray photoelectron spectroscopy (XPS) and Fourier transform infrared spectroscopy (FTIR) to provide new information regarding the bonding environments in the altered layer on the surface of a metakaolin particle in contact with different alkali hydroxide solutions (Li, Na and K as alkali cations, and concentrations ranging from 1-8 mol/L). The use of photoacoustic infrared spectroscopy enables the collection of spectra as a function of depth into the particle, and these are compared with surface-sensitive attenuated total reflectance FTIR spectra. In parallel, chemical state plots derived from XPS spectra provide new insight into the evolution of bonding environments of the silicon and aluminium atoms comprising the altered layer on the metakaolin surface.

Keywords

Portland Cement Silicate Layer Alkaline Environment Supplementary Cementitious Material Bonding Environment 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Notes

Acknowledgments

This study was sponsored by the Australian Research Council (ARC) through Discovery Project and Linkage Project Grants, including co-funding of the linkage project by Zeobond Pty Ltd.

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Copyright information

© RILEM 2015

Authors and Affiliations

  • John L. Provis
    • 1
    Email author
  • Syet Li Yong
    • 2
  • Jannie S. J. van Deventer
    • 2
    • 3
  1. 1.Department of Materials Science and EngineeringThe University of SheffieldSheffieldUK
  2. 2.Department of Chemical and Biomolecular EngineeringThe University of MelbourneVictoriaAustralia
  3. 3.Zeobond Pty LtdDocklandsAustralia

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