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Effect of multiple freeze-thaw on rheological properties and chemical composition of asphalt binders
Highlights The freeze-thaw cycle caused the complex modulus of asphalt binders to decrease and the phase angle to increase. The influence of freeze-thaw cycles on SBS modified asphalt binder was more obvious than that of base asphalt binder. The creep recovery rate of SBS modified asphalt binder was reduced, opposite to that of base asphalt binder.
Abstract Perennial freeze-thaw cycles have caused frequent disasters on asphalt pavements. To investigate the effect of four types of freeze-thaw cycles on asphalt binders, the DSR and FTIR test results of #70 Jinlin base asphalt binder (J binder) and SBS modified asphalt binder (S binder) were studied. The rutting factor, creep compliance and fatigue life of binders after freeze-thaw cycles were evaluated first, and then the chemical composition was analyzed. The results show that multiple freeze-thaw cycles lead to a growth in the complex modulus of asphalt binders, but the phase angle of S binder did not decrease significantly. The attenuation of fatigue life of S binder was significantly higher than that of J binder, and there was a certain dependency on fatigue parameters and freeze-thaw damage based on the S-VECD model. Furthermore, after the freeze-thaw cycle, the creep recovery of S binder decreased, while that of J binder increased, due to the increased elasticity by the oxidation of J binder. Carbonyl index (CI) and sulfoxide index (SI) of binders gradually grew with the number of freeze-thaw cycles, and butadiene index (BI) of S binder also slightly decreased. In general, during repeated freezing and thawing, low temperature had a certain adverse influence on the binders, but it is lower than that caused by high temperature.
Effect of multiple freeze-thaw on rheological properties and chemical composition of asphalt binders
Highlights The freeze-thaw cycle caused the complex modulus of asphalt binders to decrease and the phase angle to increase. The influence of freeze-thaw cycles on SBS modified asphalt binder was more obvious than that of base asphalt binder. The creep recovery rate of SBS modified asphalt binder was reduced, opposite to that of base asphalt binder.
Abstract Perennial freeze-thaw cycles have caused frequent disasters on asphalt pavements. To investigate the effect of four types of freeze-thaw cycles on asphalt binders, the DSR and FTIR test results of #70 Jinlin base asphalt binder (J binder) and SBS modified asphalt binder (S binder) were studied. The rutting factor, creep compliance and fatigue life of binders after freeze-thaw cycles were evaluated first, and then the chemical composition was analyzed. The results show that multiple freeze-thaw cycles lead to a growth in the complex modulus of asphalt binders, but the phase angle of S binder did not decrease significantly. The attenuation of fatigue life of S binder was significantly higher than that of J binder, and there was a certain dependency on fatigue parameters and freeze-thaw damage based on the S-VECD model. Furthermore, after the freeze-thaw cycle, the creep recovery of S binder decreased, while that of J binder increased, due to the increased elasticity by the oxidation of J binder. Carbonyl index (CI) and sulfoxide index (SI) of binders gradually grew with the number of freeze-thaw cycles, and butadiene index (BI) of S binder also slightly decreased. In general, during repeated freezing and thawing, low temperature had a certain adverse influence on the binders, but it is lower than that caused by high temperature.
Effect of multiple freeze-thaw on rheological properties and chemical composition of asphalt binders
Chen, Huaxin (author) / Chen, Mingyuan (author) / Geng, Jiuguang (author) / He, Leilei (author) / Xia, Caiyun (author) / Niu, Yanhui (author) / Luo, Mingjin (author)
2021-09-27
Article (Journal)
Electronic Resource
English
| British Library Online Contents | 2018
| British Library Online Contents | 2018
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