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材料特性对沥青-集料界面粘附性的影响

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Keywords: 道路工程,沥青-集料,界面,粘附性,影响因素,表面能

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Abstract:

为了研究沥青-集料界面的粘附性能,详细分析了几种主要的影响因素,并着重研究了原材料表面能对沥青-集料界面粘附性的影响;借助表面能理论,通过测定沥青与集料的表面能参数,计算得到粘附功与表面能变化,将沥青与集料之间粘聚力的自愈性、抗开裂能力作为评价沥青-集料界面粘附性的指标,分析了无水和有水情况下沥青自身内聚力的变化,以及与沥青-集料系统粘附性的变化。试验结果表明几种沥青-集料系统中,SBS改性沥青-石灰岩系统的界面粘附性最佳,克拉玛依基质沥青-角闪片麻岩最差;沥青和集料拥有较大的Lewis酸碱性力产生的粘附功和较小的范德华力产生的粘附功,有利于提高沥青-集料界面的粘附性能。

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