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Home > Publications > International Concrete Abstracts Portal
The International Concrete Abstracts Portal is an ACI led collaboration with leading technical organizations from within the international concrete industry and offers the most comprehensive collection of published concrete abstracts.
Title: Immobilization of Technetium in Blast Furnace Slag Grouts
Author(s): R. D. Spence, W. D. Bostick. E. W. McDaniel, T. M. Gilliam, J. L. Shoemaker, O. K. Tallent, I. L. Morgan, B. S. Evans-Brown, and K. E. Dodson
Publication: Special Publication
Appears on pages(s): 1579-1596
Keywords: blast furnace slag; diffusivity; grout; leaching; technitium; nitrate minerals; waste treatment; Materials Research
Abstract:Blast furnace slags have been successfully used to reduce the leachability of technetium from cement-based waste forms because the slag produces a less permeable product or reduces the pertechnetate to a less mobile form. Waste contaminated with technetium is of particular concern to the U.S. Nuclear Regulatory Commission, Department of Energy, and Environmental Protection Agency because of its mobility as the pertechnetate ion. Results on the technetium leachability of cement-based waste forms with and without a slag component and for different slags are presented. The mass transfer parameter (e.g., diffusivity) for leaching technetium from these waste forms decreased by five orders of magnitude when slag was used (i.e., using slag can increase the ANS 16.1 leachability index by five). Results of bulk and surface examinations of the slags are presented.
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