Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Laboratory evaluation of rejuvenation effect of reactive rejuvenator on aged SBS modified bitumen
A reactive rejuvenator (RR) containing epoxy functional groups and a conventional rejuvenator (CR) were used to regenerate the aged SBS modified bitumen (SBSMB). Effects of two kinds of rejuvenators on physical properties, rheological properties, chemical structure and phase morphology of the aged SBSMB were investigated. Compared with CR, RR performs better in recovering the physical and rheological properties of aged SBSMB, especially for ductility, 9 wt% RR could recover the ductility of aged SBSMB to a level which is close to virgin SBSMB, and the RR shows more effective regeneration effect in the repeated aging and regeneration. FTIR and phase morphology analysis indicates that epoxy functional groups in RR could react with carboxylic groups formed in the degradation of SBS and generate carboxylic ester group, which could bond those oxygenated chain fragments of SBS, enhance the interaction among the SBS chains and partially offset the degradation of SBS chains and the swelling and dilution effects of oily compositions on SBS, resulting in good restoration of the network structure of SBS and the ductility of SBSMB.
Laboratory evaluation of rejuvenation effect of reactive rejuvenator on aged SBS modified bitumen
A reactive rejuvenator (RR) containing epoxy functional groups and a conventional rejuvenator (CR) were used to regenerate the aged SBS modified bitumen (SBSMB). Effects of two kinds of rejuvenators on physical properties, rheological properties, chemical structure and phase morphology of the aged SBSMB were investigated. Compared with CR, RR performs better in recovering the physical and rheological properties of aged SBSMB, especially for ductility, 9 wt% RR could recover the ductility of aged SBSMB to a level which is close to virgin SBSMB, and the RR shows more effective regeneration effect in the repeated aging and regeneration. FTIR and phase morphology analysis indicates that epoxy functional groups in RR could react with carboxylic groups formed in the degradation of SBS and generate carboxylic ester group, which could bond those oxygenated chain fragments of SBS, enhance the interaction among the SBS chains and partially offset the degradation of SBS chains and the swelling and dilution effects of oily compositions on SBS, resulting in good restoration of the network structure of SBS and the ductility of SBSMB.
Laboratory evaluation of rejuvenation effect of reactive rejuvenator on aged SBS modified bitumen
Xu, Song (Autor:in) / Yu, Jianying / Hu, Changbin / Qin, Defeng / Xue, Lihui
2017
Aufsatz (Zeitschrift)
Englisch
Physical property , Operating Procedures, Materials Treatment , Theoretical and Applied Mechanics , Rheological property , Bitumens , Composition effects , Materials Science, general , SBS modified bitumen , Rheology , Oxygenated , Building Materials , Morphology , Ductility , Restoration , Fragments , Dilution , Phase morphology , Physical properties , Structural Mechanics , Civil Engineering , Regeneration , Chains , Chemical structure , Degradation , Rheological properties , Engineering , Reactive rejuvenator , Functional groups
Laboratory evaluation of rejuvenation effect of reactive rejuvenator on aged SBS modified bitumen
| Springer Verlag | 2017
Laboratory evaluation of rejuvenation effect of reactive rejuvenator on aged SBS modified bitumen
| Online Contents | 2017
Laboratory evaluation of rejuvenation effect of reactive rejuvenator on aged SBS modified bitumen
| Springer Verlag | 2017
On the rejuvenator dosage optimization for aged SBS modified bitumen
| Elsevier | 2020