Hostname: page-component-586b7cd67f-rcrh6 Total loading time: 0 Render date: 2024-11-29T06:25:13.817Z Has data issue: false hasContentIssue false
  • English
  • Français

Cement Paste Microstructure in Concrete

Published online by Cambridge University Press:  25 February 2011

Sidney Diamond
Sidney Diamond*
Affiliation:
School of Civil Engineering Purdue University, West Lafayette, IN 47907
Get access

Abstract

An understanding of the microstructure of cement paste in actual field concrete is considered to be the primary objective of cement microstructural studies. Cement paste in concrete is shown to consist of narrow ribbons of the order of 80 to 150 μm separating sand and coarse aggregate grains, and interrupted by frequent air voids. Individual cement grains form shells around themselves early in the hydration process. In subsequent hydration they either deposit dense layers of internal hydration product or empty out in a hollow-shell mode and precipitate hydration products in the empty spaces between nearby shells. Analogous shells are similarly formed around fly ash particles, which then react by progressive etching from within the shells. Interfacial zones around aggregates are pictured as having a complex characteristic structure including at least four different forms of calcium hydroxide particles with various preferred orientations. It is suggested that the conventional picture of the “aureole de transition” derived from successive x-ray diffraction measurements may have been misinterpreted.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 85: Symposium M – Microstructural Development During Hydration of Cement , 1986 , 21
Copyright
Copyright © Materials Research Society 1987

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)

References

1. Diamond, S., Proc. Int. Congr. Chem. Cem., 8th, 1986, 122–150.Google Scholar
2. Diamond, S., Mindess, S., and Lovell, J., in Proc. Colloque Intl. Liaisons Pates de Ciment Materiaux Associes, Toulouse pp. 42–46 (1982).Google Scholar
3. Pratt, P.L. and Jennings, H.M., Ann. Rev. Mater. Sci. 11, 123–149 (1981).CrossRefGoogle Scholar
4. BLrnes, P., Chose, A., and Mackay, A.L., Cem. Concr. Res. 10, 639–646 (1980).CrossRefGoogle Scholar
5. Orr, D.M., Proc. Rilem Conf. Concr. at Early Ages, Paris 1 57–61 (1980).Google Scholar
6. Hadley, D. N, Ph. D. thesis, Purdue University (1972).Google Scholar
7. Barnes, B.D, Diamond, S., and Dolch, W.L., Cem. Concr. Res. 8, 263–271 (1978).CrossRefGoogle Scholar
8. Pratt, P.L. and Chose, A., Philos. Trans. R. Soc. London A310, 93–103 (1983).Google Scholar
9. Williamson, R.B., Solidification of Portland Cement, Report No. UC-SESM 70–23 (University of California, Berkeley, 1970) 109 pp.Google Scholar
10. Halse, Y., Pratt, P.L., Dalzeil, J.A., and Gutteridge, W.A., Cem. Concr. Res. 14, 491–498 (1984).CrossRefGoogle Scholar
11. Monteiro, P.J.M., Ph. D.thesis, University of California, Berkeley (1985).Google Scholar
12. Ollivier, J.P., Ph. D. thesis, I.N.S.A., Toulouse (1981).Google Scholar
13. Diamond, S., manuscript prepared for submission to Cem. Concr. Res. (1987).Google Scholar
14. Bentur, A. and Diamond, S., Intl. J. Cem. Composites and Lightweight Aggregates 8(4), 213–22 (1986).CrossRefGoogle Scholar
15. Bentur, A. and Diamond, S., Mater. Constr. (Paris) 18(103) 49–56 (1985).CrossRefGoogle Scholar