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

Published online by Cambridge University Press:  25 February 2011

Karen L. Scrivener ,
H. H. Patel ,
P. L. Pratt  and
L. J. Parrott
Karen L. Scrivener
Affiliation:
Dept of Metallurgy & Materials Science, Imperial College, Prince Consort Rd, London SW7 2BP, UK
H. H. Patel
Affiliation:
Dept of Metallurgy & Materials Science, Imperial College, Prince Consort Rd, London SW7 2BP, UK
P. L. Pratt
Affiliation:
Dept of Metallurgy & Materials Science, Imperial College, Prince Consort Rd, London SW7 2BP, UK
L. J. Parrott
Affiliation:
Cement & Concrete Association, Wexham Springs, Slough SL3 6PL, UK
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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.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 85: Symposium M – Microstructural Development During Hydration of Cement , 1986 , 67
Copyright
Copyright © Materials Research Society 1987

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References

REFERENCES

1. Scrivener, K.L. and Pratt, P.L., Proc. Int. Conf. Cem. Microsc., 6th, 1984 (ICMA, Duncanville, 1984), pp. 145–155.Google Scholar
2. Scrivener, K.L., PhD thesis, University of London (1984).Google Scholar
3. Scrivener, K.L., Research on the Manufacture and Use of Cements, edited by Frohnsdorff, G., (Engineering Foundation, pp. 117–119, 1986).Google Scholar
4. Parrott, L.J., Cem. Concr. Res. 11, 651–658 (1981).Google Scholar
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