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Modeling of diffusive mass transport in micropores in cement based materials / Yamaguchia Tetsuji in Cement and concrete research, Vol. 39 N° 12 (Décembre 2009) 

Public ISBD [article]  in Cement and concrete research > Vol. 39 N° 12 (Décembre 2009) . - pp. 1149-1154 Titre : Modeling of diffusive mass transport in micropores in cement based materials Type de document : texte imprimé Auteurs : Yamaguchia Tetsuji, Auteur ; Kumi Negishi, Auteur ; Seiichi Hoshino, Auteur Année de publication : 2010 Article en page(s) : pp. 1149-1154 Note générale : Génie Civil Langues : Anglais (eng) Mots-clés : Microstructure  ;  Diffusion  ;  Long-term  performance  ;  Modeling  ;  Waste  management Index. décimale : 691 Matériaux de construction. Pièces et parties composantes Résumé : In order to predict long-term leaching behavior of cement constituents for safety assessments of radioactive waste disposal, we modeled diffusive mass transport in micropores in cement based materials. Based on available knowledge on the pore structure, we developed a transport porosity model that enables us to estimate effective porosity available for diffusion (transport porosity) in cement based materials. We microscopically examined the pore structure of hardened cement pastes to partially verify the model. Effective diffusivities of tritiated water in hardened cement pastes were also obtained experimentally, and were shown to be proportional to the estimated transport porosity. DEWEY : 620.13 ISSN : 0008-8846 En ligne : http://www.sciencedirect.com/science/article/pii/S0008884609002257 [article] Modeling of diffusive mass transport in micropores in cement based materials [texte imprimé] / Yamaguchia Tetsuji, Auteur ; Kumi Negishi, Auteur ; Seiichi Hoshino, Auteur . - 2010 . - pp. 1149-1154. Génie Civil Langues : Anglais (eng) in Cement and concrete research > Vol. 39 N° 12 (Décembre 2009) . - pp. 1149-1154 Mots-clés : Microstructure  ;  Diffusion  ;  Long-term  performance  ;  Modeling  ;  Waste  management Index. décimale : 691 Matériaux de construction. Pièces et parties composantes Résumé : In order to predict long-term leaching behavior of cement constituents for safety assessments of radioactive waste disposal, we modeled diffusive mass transport in micropores in cement based materials. Based on available knowledge on the pore structure, we developed a transport porosity model that enables us to estimate effective porosity available for diffusion (transport porosity) in cement based materials. We microscopically examined the pore structure of hardened cement pastes to partially verify the model. Effective diffusivities of tritiated water in hardened cement pastes were also obtained experimentally, and were shown to be proportional to the estimated transport porosity. DEWEY : 620.13 ISSN : 0008-8846 En ligne : http://www.sciencedirect.com/science/article/pii/S0008884609002257