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蓄盐沥青混合料除冰雪性能研究

, PP. 23-29

Keywords: 道路工程,沥青混合料,试验研究,蓄盐路面,冰雪与路面粘结力,蓄盐添加剂,冰点

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Abstract:

?为了有效评价沥青路面除冰雪性能、揭示蓄盐沥青混合料除冰雪机理及效果,首先对蓄盐沥青混合料的路用性能进行了研究;其次开发了冰膜与沥青混合料表面粘结力测试系统,提出采用极限破坏拉力和破坏界面等级综合评价混合料与冰的粘结能力,分析了级配类型、温度对粘结能力的影响;并设计了冰点试验方法,研究了蓄盐沥青混合料除冰雪机理;最后通过室内试验和室外实体工程对除冰雪效果进行了验证。结果表明:蓄盐沥青混合料能有效降低混合料与冰之间的粘结力,-5℃时蓄盐混合料的极限破坏拉力比普通混合料降低了27.8%;开级配沥青混合料与冰之间的粘结力大于密级配沥青混合料,且粘结力随公称最大粒径的增加或温度降低而增大,破坏界面等级随温度降低而下降;蓄盐路面具有良好的路用性能和除冰雪效果。

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