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Fast - rate – constant - rate oxidation kinetics model for asphalt binders / Xin Jin in Industrial & engineering chemistry research, Vol. 50 N° 23 (Décembre 2011) 

Public ISBD [article]  in Industrial & engineering chemistry research > Vol. 50 N° 23 (Décembre 2011) . - pp. 13373-13379 Titre : Fast - rate – constant - rate oxidation kinetics model for asphalt binders Type de document : texte imprimé Auteurs : Xin Jin, Auteur ; Rongbin Han, Auteur ; Yuanchen Cui, Auteur Année de publication : 2012 Article en page(s) : pp. 13373-13379 Note générale : Chimie industrielle Langues : Anglais (eng) Mots-clés : Modeling  Binders  Kinetic  model  Oxidation  Kinetics  Rate  constant Résumé : Asphalt oxidative aging at constant temperature is characterized by a declining fast-rate period and a constant-rate period. While constant-rate reaction kinetics are known for many asphalt materials, much less is known about the equally important fast-rate region. Fifteen modified and unmodified asphalts were aged at five temperatures in 1 atm air, with samples collected during both fast-rate and constant-rate periods. Arrhenius kinetics parameters were obtained for both reactions; an additional parameter characterizes the total oxidation that occurs by the fast-rate, first-order reaction. Interestingly, the data show correlations between the kinetics parameters. Viscosity hardening in response to oxidation, as characterized by hardening susceptibility, is not significantly different for the two aging periods for a single binder. Therefore, the combined first-order, zero-order oxidation model together with hardening susceptibility is capable of modeling asphalt oxidation and hardening. Such a capability is fundamentally important to modeling pavement oxidation, to predicting pavement performance, and to improving pavement design. DEWEY : 660 ISSN : 0888-5885 En ligne : http://cat.inist.fr/?aModele=afficheN&cpsidt=25267495 [article] Fast - rate – constant - rate oxidation kinetics model for asphalt binders [texte imprimé] / Xin Jin, Auteur ; Rongbin Han, Auteur ; Yuanchen Cui, Auteur . - 2012 . - pp. 13373-13379. Chimie industrielle Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol. 50 N° 23 (Décembre 2011) . - pp. 13373-13379 Mots-clés : Modeling  Binders  Kinetic  model  Oxidation  Kinetics  Rate  constant Résumé : Asphalt oxidative aging at constant temperature is characterized by a declining fast-rate period and a constant-rate period. While constant-rate reaction kinetics are known for many asphalt materials, much less is known about the equally important fast-rate region. Fifteen modified and unmodified asphalts were aged at five temperatures in 1 atm air, with samples collected during both fast-rate and constant-rate periods. Arrhenius kinetics parameters were obtained for both reactions; an additional parameter characterizes the total oxidation that occurs by the fast-rate, first-order reaction. Interestingly, the data show correlations between the kinetics parameters. Viscosity hardening in response to oxidation, as characterized by hardening susceptibility, is not significantly different for the two aging periods for a single binder. Therefore, the combined first-order, zero-order oxidation model together with hardening susceptibility is capable of modeling asphalt oxidation and hardening. Such a capability is fundamentally important to modeling pavement oxidation, to predicting pavement performance, and to improving pavement design. DEWEY : 660 ISSN : 0888-5885 En ligne : http://cat.inist.fr/?aModele=afficheN&cpsidt=25267495