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Effect of activation conditions of a kaolinite based waste on rheology of blended cement pastes / P. F. G. Banfill in Cement and concrete research, Vol. 39 N° 10 (Octobre 2009) 

Public ISBD [article]  in Cement and concrete research > Vol. 39 N° 10 (Octobre 2009) . - pp. 843–848 Titre : Effect of activation conditions of a kaolinite based waste on rheology of blended cement pastes Type de document : texte imprimé Auteurs : P. F. G. Banfill, Auteur ; O. Rodríguez, Auteur ; M.I. Sánchez de Rojas, Auteur Année de publication : 2009 Article en page(s) : pp. 843–848 Note générale : Génie Civil Langues : Anglais (eng) Mots-clés : Rheology;  Thermal  treatment;  Cement  paste;  Waste  paper  sludge Index. décimale : 691 Matériaux de construction. Pièces et parties composantes Résumé : This paper reports the influence of calcining temperature on the rheology of blended cement pastes with 10 and 20% of thermally activated paper sludge as pozzolan at water/binder ratio of 0.5 and 0.4. The kaolinite based waste was activated at different activation temperatures (700–800 °C) and retention times of 2 and 5 h. The yield stress of the blended pastes increased when the activation intensity increased as a result of the increased calcite and free lime content. Due to the stiffness of the blended pastes, a superplasticiser (sodium lignosulfonate) was used in order to reduce the yield stress. The best results could be obtained using the lower calcining temperature (700 °C and 2 h). DEWEY : 620.13 ISSN : 0008-8846 En ligne : http://www.sciencedirect.com/science/article/pii/S0008884609001409 [article] Effect of activation conditions of a kaolinite based waste on rheology of blended cement pastes [texte imprimé] / P. F. G. Banfill, Auteur ; O. Rodríguez, Auteur ; M.I. Sánchez de Rojas, Auteur . - 2009 . - pp. 843–848. Génie Civil Langues : Anglais (eng) in Cement and concrete research > Vol. 39 N° 10 (Octobre 2009) . - pp. 843–848 Mots-clés : Rheology;  Thermal  treatment;  Cement  paste;  Waste  paper  sludge Index. décimale : 691 Matériaux de construction. Pièces et parties composantes Résumé : This paper reports the influence of calcining temperature on the rheology of blended cement pastes with 10 and 20% of thermally activated paper sludge as pozzolan at water/binder ratio of 0.5 and 0.4. The kaolinite based waste was activated at different activation temperatures (700–800 °C) and retention times of 2 and 5 h. The yield stress of the blended pastes increased when the activation intensity increased as a result of the increased calcite and free lime content. Due to the stiffness of the blended pastes, a superplasticiser (sodium lignosulfonate) was used in order to reduce the yield stress. The best results could be obtained using the lower calcining temperature (700 °C and 2 h). DEWEY : 620.13 ISSN : 0008-8846 En ligne : http://www.sciencedirect.com/science/article/pii/S0008884609001409