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Physical Properties of Saltstone: Physical Properties of Saltstone: A Savannah River Plant Waste Form

Published online by Cambridge University Press:  26 February 2011

Christine A. Langton
Christine A. Langton*
Affiliation:
E. I. du Pont de Nemours and Company, Savannah River Laboratory Aiken, South Carolina 29808
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Abstract

A cement-based waste form, “saltstone,” has been designed for disposal of Savannah River Plant low-level radioactive salt waste. Laboratory and field tests indicate that this stabilization process greatly reduces the mobility of all of the waste constituents in the surface and near-surface environment. Bulk properties of this material have been tailored with respect to salt leach rate, permeability, and compressive strength. Microstructure and mineralogy were characterized by SEM and x-ray diffraction analyses.

Compressive strength was found to increase as the water to cement ratio decreased. Porosity and mean pore size increased with increasing water to cement ratios. Bulk diffusivities of the various ions dissolved in the pore solutions were also found to increase as water to cement ratios increased.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 44: Symposium N – Scientific Basis for Nuclear Waste Management VIII , 1984 , 859
Copyright
Copyright © Materials Research Society 1985

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References

1. Barnes, M. W., Langton, C. A., and Roy, D. M., “Leaching of Saltstone,” Proceedings, this symposium, 1985.Google Scholar
2. Langton, C. A., Dukes, M. D., and Simmons, R. V., “Cement-Based Waste Forms for Disposal of Savannah River Plant Low-Level Radioactive Salt Waste,” Sci. Basis for Nuclear Waste Management, 7, 575–582, McVay, G. L., ed., North-Holland, NY, 1984.Google Scholar
3. Langton, C. A., “Saltstone: Cement Based Waste Form for Disposal of SRP Low-Level Waste,” Fifth DOE Environmental Protection Conference, Albuquerque, NM, November6–8, 1984. Proceedings to be published.Google Scholar
4. Ushiyama, H. and Goto, S., “Diffusion of Various Ions in Hardened Portland Cement Paste,” The Sixth International Congress on the Chemistry of Cement, Moscow, September 1974. Published in Moscow, Boldgrev, A. S., ed., p 3–24, 1976.Google Scholar
5. Page, C. I., Short, N. R., and Tarras, A. El, “Diffusion of Chloride Ions in Hardened Cement Paste,” Cement and Concrete Research, 11, 395–406, 1981.CrossRefGoogle Scholar