Skip to main content Accessibility help
×
Home

Mechanistic Model for the Durability of Concrete Barriers Exposed to Sulphate-Bearing Groundwaters

  • Alan Atkinson (a1) and John A. Hearne (a1)

Abstract

The durability of concretes in radioactive waste repositories is likely to be limited by their reaction with sulphate-bearing groundwaters. In such a situation the concrete slowly degrades by sulphate penetrating into the concrete where it reacts with the cement to cause stress and eventual disruption. Experiments have been carried out to quantify these reactions and the resulting expansions. The data have been incorporated into an overall mechanistic model for sulphate degradation in which the criterion for disruption is the accumulation of a critical amount of stored elastic energy in the reaction zone. The results of this model are in good agreement with those of an earlier empirical model and enable extrapolations to be made to different concretes and groundwaters.

Copyright

References

Hide All
1. Atkinson, A. and Hearne, J.A., Harwell Laboratory Report AERE-R11465, 1984.
2. Atkinson, A., Goult, D.J. and Hearne, J.A., Mat. Res. Soc. Symp. Proc. 50, 239 (1985).
3. Gutt, W.H. and Harrison, W.H., Concrete 11, 35 (1977).
4. Atkinson, A., Haxby, A. and Hearne, J.A., UK Nirex Report NSS/R127, 1988.
5 Atkinson, A. and Nickerson, A.K., J. Mater. Sci. 19, 3068 (1984).
6. Atkinson, A., Nelson, K. and Valentine, T.M., Nuclear and Chemical Waste Management 6, 241 (1986).
7. Bernstein, H.L., Metall. Trans. A 18A, 975 (1987).
8. Evans, H.E. and Lobb, R.C., Corros. Sci. 24, 209 (1984).
9. Eden, N. B. and Bailey, J.E., J. Mater. Sci. 19, 150 (1984).
10. Rasmuson, A., Neretnieks, I. and Zhu, M., in Proceedings of an NEA Workshop on Near-field Assessment of Repositories for Low and Medium Level Radioactive Waste Baden (1987) pp 159171.

Metrics

Full text views

Total number of HTML views: 0
Total number of PDF views: 0 *
Loading metrics...

Abstract views

Total abstract views: 0 *
Loading metrics...

* Views captured on Cambridge Core between <date>. This data will be updated every 24 hours.

Usage data cannot currently be displayed