Effect of Graphene on Anti-aging Properties of Rubber Modified Asphalt

被引：0
|
作者：
Bao D. [1 ,2 ,3 ]
Cao Q. [2 ,3 ]
Zhang F. [2 ,3 ]
Dong H. [2 ,3 ]
Wang P. [2 ,3 ]
机构：
[1] School of Civil Engineering, Lanzhou Jiaotong University, Lanzhou
[2] Gansu Province Communications Planning Survey & Design Institute Co., Ltd., Lanzhou
[3] Gansu Changlong Highway Maintenance Technology Institute Co., Ltd., Lanzhou
来源：
Jianzhu Cailiao Xuebao/Journal of Building Materials | 2020年 / 23卷 / 05期
关键词：
Glover-Rowe(G-R) parameter; Graphene-rubber composite modified asphalt; Main curve at 15℃; Normalized carbonyl index(NCI); Normalized sulfoxide index(NSI); Thermo-oxidative aging;
D O I：
10.3969/j.issn.1007-9629.2020.05.017
中图分类号：
学科分类号：
摘要：
The effect of long-term laboratory aging on rheological properties and cracking resistance of graphene-rubber composite modified asphalt was investigate. Graphene-rubber composite modified asphalt and SBS modified asphalt, SBS-crumb rubber compound modified asphalt were subjected to thin film oven test(TFOT) and 20, 40, 60h pressure aging vessel(PAV) test. Dynamic shear rheometer(DSR) frequency scanning and Fourier infrared spectroscopic(FTIR)tests were carried out on asphalts with different aging time. The results indicate that graphene can effectively reduce the growth rate of normalized carbonyl index(NCI) and normalized sulfoxide index(NSI) of graphene-rubber composite modified asphalt with the aging time. Graphene decreases the increase of phase angle of graphene-rubber composite modified asphalt in low frequency, which shows that the viscosity of low frequency decreases after long-term aging. Graphene decreases the increase of Glover-Rowe(G-R)parameter during 20h to 40h thermal oxidative aging, and effectively increases the crack resistance of asphalt at medium temperature. © 2020, Editorial Department of Journal of Building Materials. All right reserved.
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页码：1113 / 1120
页数：7
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