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Coupled effect of time and temperature on variations of plastic viscosity of highly flowable mortar / Jean-Yves Petit in Cement and concrete research, Vol. 39 N° 3 (Mars 2009) 

Public ISBD [article]  in Cement and concrete research > Vol. 39 N° 3 (Mars 2009) . - pp. 165–170 Titre : Coupled effect of time and temperature on variations of plastic viscosity of highly flowable mortar Type de document : texte imprimé Auteurs : Jean-Yves Petit, Auteur ; Kamal H. Khayat, Auteur ; Eric Wirquin, Auteur Année de publication : 2009 Article en page(s) : pp. 165–170 Note générale : Génie Civil Langues : Anglais (eng) Mots-clés : Temperature  ;  Fresh  concrete  ;  High-range  water  reducers  ;  Rheology  ;  Plastic  viscosity Résumé : Self-consolidating concrete (SCC) is being increasingly used as construction material for its workability. However, the rheological properties of such concrete, which is made with significant concentration of high-range water-reducing admixture (HRWRA), depend in most cases on the casting temperature of the material. The study presented herein aimed at evaluating the coupled influence of time and temperature on the variations of plastic viscosity (µ) of micro mortar made with polymelamine (PMS), polynaphtalene (PNS) and polycarboxylate (PCP) polymer. In total, seven micro mortar mixtures proportioned with various binder compositions and water-to-binder ratios of 0.42 and 0.53 were prepared at 10 to 33 °C. Test results show that the plastic viscosity varies linearly with the coupled effect of time and temperature for mixtures made with PNS or PMS HRWRA. However, for mixtures made with PCP-HRWRA, both temperature and mixture proportioning have influence on the variation of viscosity with time. ISSN : 0008-8846 En ligne : http://www.sciencedirect.com/science/article/pii/S0008884608002366 [article] Coupled effect of time and temperature on variations of plastic viscosity of highly flowable mortar [texte imprimé] / Jean-Yves Petit, Auteur ; Kamal H. Khayat, Auteur ; Eric Wirquin, Auteur . - 2009 . - pp. 165–170. Génie Civil Langues : Anglais (eng) in Cement and concrete research > Vol. 39 N° 3 (Mars 2009) . - pp. 165–170 Mots-clés : Temperature  ;  Fresh  concrete  ;  High-range  water  reducers  ;  Rheology  ;  Plastic  viscosity Résumé : Self-consolidating concrete (SCC) is being increasingly used as construction material for its workability. However, the rheological properties of such concrete, which is made with significant concentration of high-range water-reducing admixture (HRWRA), depend in most cases on the casting temperature of the material. The study presented herein aimed at evaluating the coupled influence of time and temperature on the variations of plastic viscosity (µ) of micro mortar made with polymelamine (PMS), polynaphtalene (PNS) and polycarboxylate (PCP) polymer. In total, seven micro mortar mixtures proportioned with various binder compositions and water-to-binder ratios of 0.42 and 0.53 were prepared at 10 to 33 °C. Test results show that the plastic viscosity varies linearly with the coupled effect of time and temperature for mixtures made with PNS or PMS HRWRA. However, for mixtures made with PCP-HRWRA, both temperature and mixture proportioning have influence on the variation of viscosity with time. ISSN : 0008-8846 En ligne : http://www.sciencedirect.com/science/article/pii/S0008884608002366