华南理工大学学报(自然科学版) ›› 2012, Vol. 40 ›› Issue (2): 99-103.

• 交通与运输工程 • 上一篇    下一篇

基于累计耗散能量比的改性沥青疲劳性能

孟勇军 张肖宁   

  1. 华南理工大学 土木与交通学院,广东 广州 510640
  • 收稿日期:2011-06-09 修回日期:2011-10-27 出版日期:2012-02-25 发布日期:2012-01-04
  • 通信作者: 孟勇军(1981-) ,男,博士,主要从事道路工程材料与结构研究. E-mail:hitmengyj@163.com
  • 作者简介:孟勇军(1981-) ,男,博士,主要从事道路工程材料与结构研究.
  • 基金资助:

    国家自然科学基金资助项目( 51038004)

Fatigue Performances of Modified Asphalts Based on Cumulative Dissipated Energy Ratio

Meng Yong-jun  Zhang Xiao-ning   

  1. School of Civil Engineering and Transportation,South China University of Technology,Guangzhou 510640,Guangdong,China
  • Received:2011-06-09 Revised:2011-10-27 Online:2012-02-25 Published:2012-01-04
  • Contact: 孟勇军(1981-) ,男,博士,主要从事道路工程材料与结构研究. E-mail:hitmengyj@163.com
  • About author:孟勇军(1981-) ,男,博士,主要从事道路工程材料与结构研究.
  • Supported by:

    国家自然科学基金资助项目( 51038004)

摘要: 通过对不同改性沥青的流变性能试验,分析了基于累计耗散能量比( DER) 的改性沥青疲劳性能指标,研究了不同嵌段比的改性沥青的疲劳性能,并根据DER 进行对比分析. 基于改性沥青的疲劳性能特点,在室内通过弯曲疲劳性能试验进一步验证了用DER 评价改性沥青疲劳性能的有效性,为改性沥青的疲劳性能判定提供了新的参考指标.

关键词: 改性沥青, 累计耗散能, 流变理论, 疲劳性能

Abstract:

In this paper,the rheological properties of different modified asphalts are experimentally investigated,and the fatigue performance index based on the cumulative dissipated energy ratio ( DER) is analyzed. Then,the fatigue performances of modified asphalts with different block ratios are discussed and compared according to the DER. Moreover,according to the fatigue performances of modified asphalts,some bending fatigue tests are carried out. The results show that DER is effective in evaluating the fatigue performances of modified asphalts and can be used as a reference index of the fatigue performances of modified asphalts.

Key words: modified asphalt, cumulative dissipated energy, rheological theory, fatigue performance

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