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The Relationship Between The Porosity And Permeability Of The Surface Layer Of Concrete And The Ingress Of Aggressive Ions

Published online by Cambridge University Press:  22 February 2011

Alison K. Crumbie ,
Karen L. Scrivener  and
P. L. Pratt
Alison K. Crumbie
Affiliation:
Dept. Materials, Imperial College, London SW7 2BP, England.
Karen L. Scrivener
Affiliation:
Dept. Materials, Imperial College, London SW7 2BP, England.
P. L. Pratt
Affiliation:
Dept. Materials, Imperial College, London SW7 2BP, England.
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Abstract

The durability of concrete is strongly dependent on the distribution of porosity particularly in the surface layers. To study this distribution, concretes at different water to cement ratios were studied by methanol counter diffusion and by analysis of backscattered electron images. The distribution of porosity in the surface was compared with that in the bulk. Samples of the same concrete were imnersed in sodium sulphate solutions while others were left in lime water as a control. The effects of the immersion on the microstructure was studied with backscattered electrons in the SEM.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 137: Symposium P – Pore Structure and Permeability of Cementitious Materials , 1988 , 279
Copyright
Copyright © Materials Research Society 1989

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References

1. Parrott, L.J., Cement & Concrete Research 11, 651–658 (1981).Google Scholar
2. Parrott, L.J., Cement & Concrete Research, 13, 18–22 (1983).Google Scholar
3. Scrivener, K.L., Crumbie, A.K. & Pratt, P.L., in Bonding in Cementitious Composites, eds Mindess, S. & Shah, S.P., (Mat. Res. Soc. Symp. Proc., 114, Pittsburgh, PA 1988) pp. 87–88. Google Scholar