Evaluation parameter research of asphalt binder fatigue

被引：0

作者：

Sun, Yanna ^{[1
]}

Li, Lihan ^{[1
]}

Wang, Yukai ^{[1
]}

机构：

[1] The Key Laboratory of Road and Traffic Engineering, Ministry of Education, Tongji University, Shanghai

来源：

Xinan Jiaotong Daxue Xuebao/Journal of Southwest Jiaotong University | 2014年 / 49卷 / 06期

关键词：

Evaluation parameter; Fatigue performance; High modulus asphalt material; Road engineering;

D O I：

10.3969/j.issn.0258-2724.2014.06.025

中图分类号：

学科分类号：

摘要：

In order to determine the evaluation parameter of asphalt binder fatigue performance, fatigue performances of 5 kinds of asphalt binder (including olefin asphalt binder, natural asphalt binder, hard asphalt binder, A70# asphalt, and SBS asphalt) and asphalt mixture were tested in laboratory. Then, 4evaluation parameters, including fatigue life at 50% initial modulus reduction (Nf50), fatigue life at the accumulated dissipation energy ratio deviating 20% from the lossless line (Np20), accumulated dissipation energy, and fatigue factor (G*sin δ) were used to analyze the dependence of each evaluation parameter on the loading mode and the relationship between the evaluation parameters. The result shows that the fatigue factor G*sin δ, dissipation energy, and accumulated dissipation energy are inappropriate to be used as evaluation parameters as they cannot determine the fatigue life exactly. The other two parameters, Nf50 and Np20, however, are suitable to evaluate the binders fatigue performance. Np20 is about 0.725 times Nf50, and it is suggested using Nf50 to evaluate the fatigue performance of asphalt binders. ©, 2014, Science Press. All right reserved.

引用

页码：1102 / 1107

页数：5

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