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改性剂对沥青自愈合能力的影响 被引量:17

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摘要 采用动态剪切流变试验仪(DSR),对70号基质沥青和添加SBS、岩沥青、表面活性剂3种改性剂的沥青进行间歇疲劳加载。试验采用应变控制加载模式,当沥青达到规定的损伤度(D=15%、30%、45%)时,停止加载,并设置不同的间歇时间(300s、600s、1 800s、3 600s、5 400s)使沥青愈合,再进行重复加载。通过表象评价指标(HI1、HI2)和能量指标(HI3)对沥青愈合能力进行分析,研究改性剂对沥青自愈合能力的影响。试验结果表明:3个评价指标对沥青自愈合能力评价具有一致性,添加SBS改性剂使沥青愈合能力明显增强,添加岩沥青愈合能力减弱,添加表面活性剂对沥青愈合能力影响不大;愈合指标与间歇时间的1/4次方(t1/4)存在着很好的线性关系,且不同沥青愈合方程的斜率的大小关系与沥青自愈合能力排序一致。
出处 《公路》 北大核心 2015年第4期224-228,共5页 Highway
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参考文献11

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共引文献18

同被引文献101

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