SYNTHESIS AND CHARACTERISATION OF MAGNESIUM SILICATE HYDRATE GELS

This article reports on a study in which a Portland cement has been exposed to MgSO4 solution for 6 months and the reaction products characterized. Magnesium silicate hydrate gels (M-S-H) were prepared by precipitation. The gels were then subject to short cure, approximately 24 h at approximately 22 deg C. and longer cure, 180 days at 85 deg C., then characterized by xray diffraction (XRD), Fourier transform-infrared spectroscopy (FT-IR), and nuclear magnetic resonance (NMR). The authors conclude that aging at longer times and higher temperatures somewhat improves the local ordering. The structures and compositions of M-S-H gels differ from those of C-S-H gels. C-S-H gels contain little magnesium while M-S-H gels in blended cements coexist with C-S-H but contain little calcium. The authors contend that because of the basic structural differences between the nature of ordered regions, the two gel types (M-S-H and C-S-H) are essentially immiscible.

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    Elsevier

    The Boulevard, Langford Lane
    Kidlington, Oxford  United Kingdom  OX5 1GB
  • Authors:
    • Brew, DRM
    • Glasser, F P
  • Publication Date: 2005-1

Language

  • English

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  • Accession Number: 00988986
  • Record Type: Publication
  • Files: TRIS
  • Created Date: Apr 18 2005 12:00AM