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Analysis of Phases in Cement Paste Using Backscattered Electron Images, Methanol Adsorption and Thermogravimetric Analysis

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Abstract

In backscattered electron (bse) images of polished cement sections, anhydrous material, calcium hydroxide, other hydration products (mainly C-S-H) and porosity can be distinguished on the basis of their grey level in the image. Using an image analyzer connected directly to the SEM, it is possible to resolve these four components and so measure their relative proportions and distributions. The effects of magnification and the number of fields measured on the accuracy of bse image analysis are examined. The volume fractions of anhydrous material, porosity and calcium hydroxide derived from bse image analysis are compared with those obtained by other techniques and good correlation was found for the measurement of anhydrous material and porosity.

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References

  1. K.L. Scrivener and P.L. Pratt, Proc. Int. Conf. Cem. Microsc., 6th, 1984 (ICMA, Duncanville, 1984), pp. 145–155.

  2. K.L. Scrivener, PhD thesis, University of London (1984).

  3. K.L. Scrivener, Research on the Manufacture and Use of Cements, edited by G. Frohnsdorff, (Engineering Foundation, pp. 117–119, 1986).

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Authors and Affiliations

  1. Dept of Metallurgy & Materials Science, Imperial College, Prince Consort Rd, SW7 2BP, London, UK

    Karen L. Scrivener, H. H. Patel & P. L. Pratt

  2. Cement & Concrete Association, SL3 6PL, Wexham Springs, Slough, UK

    L. J. Parrott

Authors
  1. Karen L. Scrivener
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  2. H. H. Patel
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  3. P. L. Pratt
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  4. L. J. Parrott
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Scrivener, K.L., Patel, H.H., Pratt, P.L. et al. Analysis of Phases in Cement Paste Using Backscattered Electron Images, Methanol Adsorption and Thermogravimetric Analysis. MRS Online Proceedings Library 85, 67 (1986). https://doi.org/10.1557/PROC-85-67

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  • DOI: https://doi.org/10.1557/PROC-85-67

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