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Application of the periodic homogenization technique to ionic transfer in cementitious materials / Khaled Bourbatache in European journal of environmental and civil engineering, Vol. 15 N° 7 (Août 2011) 

Public ISBD [article]  in European journal of environmental and civil engineering > Vol. 15 N° 7 (Août 2011) . - pp. 991-1001 Titre : Application of the periodic homogenization technique to ionic transfer in cementitious materials : Case of chloride in concrete Type de document : texte imprimé Auteurs : Khaled Bourbatache, Auteur ; Olivier Millet, Auteur ; Abdelkarim Aït Mokhtar, Auteur Année de publication : 2011 Article en page(s) : pp. 991-1001 Note générale : Génie Civil Langues : Anglais (eng) Mots-clés : Ionic  transfer  Periodic  homogenization  Chlorides  ions  Cementitious  materials Index. décimale : 624 Constructions du génie civil et du bâtiment. Infrastructures. Ouvrages en terres. Fondations. Tunnels. Ponts et charpentes Résumé : In this paper we propose two macroscopic models of ionic transfer in saturated porous media. These models are established by using periodic homogenization technique for two regimes of transfer (weakly or strongly accelerated). For each regime of transfer, the associated macroscopic model obtained (pure migration or coupled diffusion-migration model) depends on the order of magnitude of the dimensionless numbers characterizing the transfer naturally introduced. Oppositely, the associated homogenised diffusion tensor is identical in the two cases of transfer considered; it depends only on the geometrical complexity of the microstructure of the porous medium. Finally numerical simulations are carried out on periodic porous media in order to calculate the corresponding homogenized diffusion tensor and to compare it with experimental results for the case of chlorides in cementitious materials. DEWEY : 624 ISSN : 1964-8189 En ligne : http://ejece.revuesonline.com/article.jsp?articleId=16502 [article] Application of the periodic homogenization technique to ionic transfer in cementitious materials : Case of chloride in concrete [texte imprimé] / Khaled Bourbatache, Auteur ; Olivier Millet, Auteur ; Abdelkarim Aït Mokhtar, Auteur . - 2011 . - pp. 991-1001. Génie Civil Langues : Anglais (eng) in European journal of environmental and civil engineering > Vol. 15 N° 7 (Août 2011) . - pp. 991-1001 Mots-clés : Ionic  transfer  Periodic  homogenization  Chlorides  ions  Cementitious  materials Index. décimale : 624 Constructions du génie civil et du bâtiment. Infrastructures. Ouvrages en terres. Fondations. Tunnels. Ponts et charpentes Résumé : In this paper we propose two macroscopic models of ionic transfer in saturated porous media. These models are established by using periodic homogenization technique for two regimes of transfer (weakly or strongly accelerated). For each regime of transfer, the associated macroscopic model obtained (pure migration or coupled diffusion-migration model) depends on the order of magnitude of the dimensionless numbers characterizing the transfer naturally introduced. Oppositely, the associated homogenised diffusion tensor is identical in the two cases of transfer considered; it depends only on the geometrical complexity of the microstructure of the porous medium. Finally numerical simulations are carried out on periodic porous media in order to calculate the corresponding homogenized diffusion tensor and to compare it with experimental results for the case of chlorides in cementitious materials. DEWEY : 624 ISSN : 1964-8189 En ligne : http://ejece.revuesonline.com/article.jsp?articleId=16502