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Some aspects of cellulose ethers influence on water transport and porous structure of cement-based materials / J. Pourchez in Cement and concrete research, Vol. 40 N° 2 (02 ex.) (Fevrier 2010) 

Public ISBD [article]  in Cement and concrete research > Vol. 40 N° 2 (02 ex.) (Fevrier 2010) . - pp. 242-252 Titre : Some aspects of cellulose ethers influence on water transport and porous structure of cement-based materials Type de document : texte imprimé Auteurs : J. Pourchez, Auteur ; B. Ruot, Auteur ; J. Debayle, Auteur Année de publication : 2010 Article en page(s) : pp. 242-252 Note générale : Génie Civil Langues : Anglais (eng) Mots-clés : Cellulose  ethers  Porous  structure  Water  transport  Microtomography Index. décimale : 691 Matériaux de construction. Pièces et parties composantes Résumé : This paper evaluates and compares the impact of cellulose ethers (CE) on water transport and porous structure of cement-based materials in both fresh and hardened state. Investigations of the porous network (mercury intrusion porosimetry, apparent density, 2D and 3D observations) emphasize an air-entrained stabilisation depending on CE chemistry. We also highlight that CE chemistry leads to a gradual effect on characteristics of the water transport. The global tendencies brought by CE are: higher water retention, lower capillarity water absorption, lower liquid water permeability as well as higher water vapour permeability. All things considered, we demonstrate that CE chemistry is an important controlling factor on water transport and porous structure evolution. DEWEY : 620.13 ISSN : 0008-8846 En ligne : http://www.sciencedirect.com/science?_ob=ArticleURL&_udi=B6TWG-4XJN4W8-2&_user=6 [...] [article] Some aspects of cellulose ethers influence on water transport and porous structure of cement-based materials [texte imprimé] / J. Pourchez, Auteur ; B. Ruot, Auteur ; J. Debayle, Auteur . - 2010 . - pp. 242-252. Génie Civil Langues : Anglais (eng) in Cement and concrete research > Vol. 40 N° 2 (02 ex.) (Fevrier 2010) . - pp. 242-252 Mots-clés : Cellulose  ethers  Porous  structure  Water  transport  Microtomography Index. décimale : 691 Matériaux de construction. Pièces et parties composantes Résumé : This paper evaluates and compares the impact of cellulose ethers (CE) on water transport and porous structure of cement-based materials in both fresh and hardened state. Investigations of the porous network (mercury intrusion porosimetry, apparent density, 2D and 3D observations) emphasize an air-entrained stabilisation depending on CE chemistry. We also highlight that CE chemistry leads to a gradual effect on characteristics of the water transport. The global tendencies brought by CE are: higher water retention, lower capillarity water absorption, lower liquid water permeability as well as higher water vapour permeability. All things considered, we demonstrate that CE chemistry is an important controlling factor on water transport and porous structure evolution. DEWEY : 620.13 ISSN : 0008-8846 En ligne : http://www.sciencedirect.com/science?_ob=ArticleURL&_udi=B6TWG-4XJN4W8-2&_user=6 [...]