Documents disponibles écrits par cet auteur

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

Effect of limestone filler content and superplasticizer dosage on rheological parameters of highly flowable mortar under light pressure conditions / Jean-Yves Petit 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. 235-241 Titre : Effect of limestone filler content and superplasticizer dosage on rheological parameters of highly flowable mortar under light pressure conditions Type de document : texte imprimé Auteurs : Jean-Yves Petit, Auteur ; Eric Wirquina, Auteur Année de publication : 2010 Article en page(s) : pp. 235-241 Note générale : Génie Civil Langues : Anglais (eng) Mots-clés : Fresh  concrete  High  range  water  reducers  Rheology  Filler  Pressure Index. décimale : 691 Matériaux de construction. Pièces et parties composantes Résumé : The influence of pressure on the yield stress and plastic viscosity of SCC mortars was investigated using an adapted Marsh cone with cylindrical shear paddles. Nine mortars proportioned with various limestone filler content and high-range water-reducing admixture (HRWRA) dosage from 0.65% to 0.85% were prepared. Test results show that when a pressure is exerted on the mortars, the material does not behave as a homogeneous fluid, i.e. having a yield stress depending only on the specific gravity of the mixture and the height of poured mortars and a constant value of plastic viscosity, but as a separative multiphasic material which consolidates, leading to exponential variations of τ0 and lowering values of μ with pressure. The HRWRA dosage or the limestone filler content has only an effect on the initial value of the yield stress, but has more influence on the variation of plastic viscosity of the mortar with pressure. DEWEY : 620.13 ISSN : 0008-8846 En ligne : http://www.sciencedirect.com/science?_ob=ArticleURL&_udi=B6TWG-4XMTFMS-1&_user=6 [...] [article] Effect of limestone filler content and superplasticizer dosage on rheological parameters of highly flowable mortar under light pressure conditions [texte imprimé] / Jean-Yves Petit, Auteur ; Eric Wirquina, Auteur . - 2010 . - pp. 235-241. Génie Civil Langues : Anglais (eng) in Cement and concrete research > Vol. 40 N° 2 (02 ex.) (Fevrier 2010) . - pp. 235-241 Mots-clés : Fresh  concrete  High  range  water  reducers  Rheology  Filler  Pressure Index. décimale : 691 Matériaux de construction. Pièces et parties composantes Résumé : The influence of pressure on the yield stress and plastic viscosity of SCC mortars was investigated using an adapted Marsh cone with cylindrical shear paddles. Nine mortars proportioned with various limestone filler content and high-range water-reducing admixture (HRWRA) dosage from 0.65% to 0.85% were prepared. Test results show that when a pressure is exerted on the mortars, the material does not behave as a homogeneous fluid, i.e. having a yield stress depending only on the specific gravity of the mixture and the height of poured mortars and a constant value of plastic viscosity, but as a separative multiphasic material which consolidates, leading to exponential variations of τ0 and lowering values of μ with pressure. The HRWRA dosage or the limestone filler content has only an effect on the initial value of the yield stress, but has more influence on the variation of plastic viscosity of the mortar with pressure. DEWEY : 620.13 ISSN : 0008-8846 En ligne : http://www.sciencedirect.com/science?_ob=ArticleURL&_udi=B6TWG-4XMTFMS-1&_user=6 [...]