Evaluation of Low Temperature Cracking Perfermance of Recycled Asphalt Binder

被引：0

作者：

Gu X. ^{[1
]}

Jiang Y. ^{[1
]}

Zhou Z. ^{[1
]}

Ni F. ^{[1
]}

机构：

[1] School of Transportation, Southeast University, Nanjing

来源：

Jianzhu Cailiao Xuebao/Journal of Building Materials | 2018年 / 21卷 / 03期

关键词：

Glover-Rowe parameter; Low temperature cracking performance; Master curve; Recycled asphalt; Recycling agent;

D O I：

10.3969/j.issn.1007-9629.2018.03.028

中图分类号：

学科分类号：

摘要：

Bending beam rheometer(BBR) tests and frequency sweep tests were conducted to investigate the low temperature cracking performance of recycled blends incorporating polymer-modified binder, RAP binder and recycling agent at different aging conditions. The optimum content of the recycling agent was determined by the target performance grading(PG) tests. The ΔTc and the Glover-Rowe(G-R) parameter results show that aging time significantly affects the cracking resistance of the recycled blends. And compared to the virgin binder, the recycled blends tend to be more sensitive to aging process. The aged modified binder has detrimental effect on long-term anti-crack property of the recycled blend, and in order to achieve similar performance to the virgin binder, the RAP binder content of the recycled blends containing the optimum dosage of recycling agent should be strictly limited below 30%. In addition, the master curve results reveal that the effects of the recycling agent and virgin modified binder on the viscoelastic nature of aged modified binder are not consistent. The recycling agent can significantly reduce the stiffness of the aged binder, while the virgin binder mainly improves the phase angle of the aged binder. © 2018, Editorial Department of Journal of Building Materials. All right reserved.

引用

页码：523 / 528

页数：5

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