Hostname: page-component-586b7cd67f-t7fkt Total loading time: 0 Render date: 2024-11-29T07:30:02.178Z Has data issue: false hasContentIssue false
  • English
  • Français

Time Depndence of pH in a Cementitious Repository

Published online by Cambridge University Press:  26 February 2011

Alan Atkinson ,
Nicoia M. Everitt  and
Richard M. Guppy
Alan Atkinson
Affiliation:
Materials Development Division, Building 429, Harwell Laboratory, Didcot, Oxfordshire 0X11 ORA, United Kingdom.
Nicoia M. Everitt
Affiliation:
Materials Development Division, Building 429, Harwell Laboratory, Didcot, Oxfordshire 0X11 ORA, United Kingdom.
Richard M. Guppy
Affiliation:
Materials Development Division, Building 429, Harwell Laboratory, Didcot, Oxfordshire 0X11 ORA, United Kingdom.
Get access

Abstract

The pH of a cementitious radioactive waste repository is expected to decrease with time as water leaches out soluble ions or as a result of reactions between repository constituents. These processes have been simulated in the laboratory and the results compared with behaviour anticipated from the known chemistry of cement compounds.

The studies indicate that the pH in Portland cements and Blast Furnace Slag cements (BFS) is likely to remain above 10.5 for very long periods of time, of the order of several hundred thousand years for a typical repository. They also show that extensive use of Pulverized Fuel Ash (PFA) leads to uncertainty in long term pH which could be as low as 9 to 10 in some cases.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 127: Symposium BERLIN – Scientific Basis for Nuclear Waste Management XII , 1988 , 439
Copyright
Copyright © Materials Research Society 1989

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

REFERENCES

[1] Greenberg, S.A. and Chang, T.N., J. Phys. Chem., 69, 182 (1965).Google Scholar
[2] Atkinson, A., Hearne, J.A. and Knights, C.F., UK Atomic Energy Authority Report AERE-R-12548 (1987).Google Scholar
[3] Berner, U., Mat. Res. Soc. Synp. Proc., 84, 319 (1987).Google Scholar
[4] Atkinson, A., Everitt, N.M. and Guppy, R.M., UK Atomic Energy Authority Report AERE-R-12939 (1988).Google Scholar
[5] Atkinson, A., UK Atomic Energy Authority Report AERE-R-11777 (1985).Google Scholar
[6] Atkinson, A., Everitt, N.M. and Guppy, R.M., UK Atomic Energy Authority Report AERE-R-12594 (1987).Google Scholar
[7] Jennings, H.M., J. Amer. Ceram. Soc., 69, 614 (1986).CrossRefGoogle Scholar
[8] Atkinson, A. and Guppy, R.M., UK Atomic Energy Authority Report AERE-R-12961 (1988).Google Scholar