Effect of Hydrothermal Coupling Aging on Performance of Rubber Modified Asphalt

Authors

CHEN Zhenwei, CCCC Second Highway Consultants Co ., Ltd., Wuhan , Hubei 430056 , ChinaFollow
WU Xuewen, CCCC Second Highway Consultants Co ., Ltd., Wuhan , Hubei 430056 , China
XIAO Xuan, School of Traffic & Transportation Engineering , Changsha University of Science and Technology , Changsha , Hunan 410114 , ChinaFollow
LI Ping, School of Traffic & Transportation Engineering , Changsha University of Science and Technology , Changsha , Hunan 410114 , China
LIU Shende, School of Traffic & Transportation Engineering , Changsha University of Science and Technology , Changsha , Hunan 410114 , China

Corresponding Author

肖璇，男，硕士研究生.E-mail：xiao990601@163.com

Abstract

To study the effect of hydrothermal coupling aging on the performance of rubber modified asphalt,this article simulated thermal aging and hydrothermal coupling aging tests and investigated the effect of different aging environments on the high-temperature and low-temperature performance of asphalt from macroscopic and microscopic levels through conventional index tests,dynamic shear rheology tests,and gel chromatography tests,as well as the effect of different aging environments on the interfacial properties through low-temperature adhesion tests of asphalt and aggregates.The results show that the effects of hydrothermal coupling aging on the ductility and softening point of rubber modified asphalt are more significant than those of thermal aging.The rutting factor,phase angle,and critical temperature of rubber modified asphalt increase with the increase in aging time,and the temperature sensitivity decreases,meaning that the high-temperature performance of the rubber improves.However,the changes in the hydrothermal coupling aging environment are more significant.Both thermal aging and hydrothermal coupling aging lead to the degradation of the interfacial properties of asphalt aggregates,but hydrothermal coupling aging has a greater influence.The macromolecular content CLMS (%) and dispersity D-value both increase with increasing aging time,but hydrothermal coupling aging increases the degree of growth in the early stage.D-value and CLMS (%) have a good correlation with softening points and ductility.

Publication Date

6-27-2024

DOI

10.14048/j.issn.1671-2579.2024.03.008

First Page

70

Last Page

77

Submission Date

February 2025

Recommended Citation

Zhenwei, CHEN; Xuewen, WU; Xuan, XIAO; Ping, LI; and Shende, LIU (2024) "Effect of Hydrothermal Coupling Aging on Performance of Rubber Modified Asphalt," Journal of China & Foreign Highway: Vol. 44: Iss. 3, Article 8.
DOI: 10.14048/j.issn.1671-2579.2024.03.008
Available at: https://zwgl1980.csust.edu.cn/journal/vol44/iss3/8

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