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温度作用下HDPE-橡胶粉改性沥青应力吸收层防止反射裂缝性能

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Keywords: 道路工程,HDPE-橡胶粉改性沥青,冻融试验,应力吸收层,温度收缩系数,线膨胀系数

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Abstract:

?为了降低沥青路面反射裂缝的产生和发展,对HDPE-橡胶粉改性沥青应力吸收层、AC-16中粒式沥青混凝土面层、6%水泥稳定砂砾3种单独试件及其组合结构试件进行了不同温度下的冻融试验。通过温度收缩系数判断温度产生的应力大小及反射裂缝情况,并充分考虑温度下降过程中路面结构所处的应力松弛状态,进行了温度作用下防止反射裂缝的性能研究。试验结果表明:HDPE-橡胶粉改性沥青层作为应力吸收层具有极好的抗反射裂缝能力,能有效延缓沥青路面反射裂缝的发生,并验证了采用其作为应力吸收层铺设的沥青路面室内试验结果。

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