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Radioactive Waste‐Portland Cement Systems: II, Leaching Characteristics
Author(s) -
JANTZEN C. M.
Publication year - 1984
Publication title -
journal of the american ceramic society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.9
H-Index - 196
eISSN - 1551-2916
pISSN - 0002-7820
DOI - 10.1111/j.1151-2916.1984.tb19681.x
Subject(s) - portland cement , radioactive waste , tobermorite , leaching (pedology) , cementitious , cement , anhydrous , radionuclide , context (archaeology) , materials science , waste management , radiochemistry , chemistry , nuclear chemistry , metallurgy , environmental science , geology , paleontology , physics , organic chemistry , quantum mechanics , soil water , soil science , engineering
Crystal chemical stabilization of radioactive wastes can be achieved during clinkering of ordinary portland cement. Crys‐tallographic relations predict that the radionuclide partitioning in the anhydrous clinkered phases will be maintained in the hydration products. The resulting hydration products are considered to be cementitious hydroxylated radiophases. Simulated leaching experiments demonstrate that the hydroxylated phases are stable and that waste element release rates are lower than for other cementitious waste forms. The formation of tobermorite as a reaction product limits the release of cesium. Radionuclide fixation is described in the context of commercial waste‐cement systems, but is applicable to transuranic, medium‐ and low‐level wastes.