Effect of Cu2+ ions and buffering capacity on smectite microstructure and performance / Raymond N. Yong in Journal of geotechnical and geoenvironmental engineering, Vol. 135 N° 12 (Décembre 2009)  

Public ISBD [article]  inJournal of geotechnical and geoenvironmental engineering > Vol. 135 N° 12 (Décembre 2009) . - pp. 1981–1985 Titre : Effect of Cu2+ ions and buffering capacity on smectite microstructure and performance Type de document : texte imprimé Auteurs : Raymond N. Yong, Auteur ; Vahid R. Ouhadi, Auteur ; Amir R. Goodarzi, Auteur Année de publication : 2010 Article en page(s) : pp. 1981–1985 Note générale : geotechnical and geoenvironmental engineering Langues : Anglais (eng) Mots-clés : Radioactive wastesClaysCorrosionSoil consolidationMicrostructuresSoil permeability Résumé : Smectite is usually used as buffer clay for contaminant of high level nuclear waste canisters. Corrosion of the canisters will expose the buffer clay to Cu2+ ions as one of the corrosion products. This study investigates the effect of Cu2+ cations in a smectite, with and without addition of sodium carbonate in the clay, on its consolidation behavior and transmission characteristics. Characterization experiments conducted in the study included determination of changes in the buffering capacity and permeability properties of the clay in relation to the presence of varying concentrations of Cu2+ , and consolidation experiments. Double-layer swelling forces and buffering capacity are seen to be dominant factors in the performance of the clays—apparently through their influence on formation and restructuring of microstructures in the overall smectite clay mixtures. En ligne : http://ascelibrary.org/doi/abs/10.1061/%28ASCE%291090-0241%282009%29135%3A12%281 [...] [article] Effect of Cu2+ ions and buffering capacity on smectite microstructure and performance [texte imprimé] / Raymond N. Yong, Auteur ; Vahid R. Ouhadi, Auteur ; Amir R. Goodarzi, Auteur . - 2010 . - pp. 1981–1985. geotechnical and geoenvironmental engineering Langues : Anglais (eng) in Journal of geotechnical and geoenvironmental engineering > Vol. 135 N° 12 (Décembre 2009) . - pp. 1981–1985 Mots-clés : Radioactive wastesClaysCorrosionSoil consolidationMicrostructuresSoil permeability Résumé : Smectite is usually used as buffer clay for contaminant of high level nuclear waste canisters. Corrosion of the canisters will expose the buffer clay to Cu2+ ions as one of the corrosion products. This study investigates the effect of Cu2+ cations in a smectite, with and without addition of sodium carbonate in the clay, on its consolidation behavior and transmission characteristics. Characterization experiments conducted in the study included determination of changes in the buffering capacity and permeability properties of the clay in relation to the presence of varying concentrations of Cu2+ , and consolidation experiments. Double-layer swelling forces and buffering capacity are seen to be dominant factors in the performance of the clays—apparently through their influence on formation and restructuring of microstructures in the overall smectite clay mixtures. En ligne : http://ascelibrary.org/doi/abs/10.1061/%28ASCE%291090-0241%282009%29135%3A12%281 [...]

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