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中文摘要：
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．
英文摘要：
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.
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