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沥青改性剂对沥青混合料疲劳性能影响研究

, PP. 33-36

Keywords: 道路工程,沥青改性剂,疲劳试验,疲劳寿命

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Abstract:

针对4种沥青改性剂路孚8000、TPS、Sasobit、SBS,利用控制应变的小梁疲劳试验,在一定的应变量下,研究各种改性剂对沥青混合料疲劳性能的影响.研究结果表明,无论何种剂量的路孚8000、TPS和SBS改性剂,对沥青混合料疲劳性能均有较大的改善,TPS和SBS改善效果较显著,尤其是TPS;SBS的疲劳寿命与基质沥青相比也增加了3倍以上.而对于Sasobit,在以一定应变为控制模式的疲劳试验中得出的结果是疲劳寿命减小.对于改性剂路孚8000和TPS,随着改性剂剂量的加大,沥青混和料疲劳寿命逐渐加大.

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