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基于渗水特性的沥青混合料空隙率标准

, PP. 17-20

Keywords: 道路工程,沥青混合料,渗水系数,空隙率

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Abstract:

首先基于合理的渗水理论选用了适宜的新型渗水仪器,并与现规范仪器进行了性能对比,验证了新型渗水仪试验结果的适用性;然后使用该渗水仪对不同级配类型沥青混合料的渗水特性进行了综合分析,同时对各种沥青混合料的渗水数据做了统计处理,以此为基础并参考国内外技术标准提出了沥青混合料的统一临界渗水系数;最后通过临界渗水系数与渗水曲线确定了不同沥青混合料满足渗水要求的临界空隙率,并以此为基础提出了AC类沥青混合料的空隙率标准。研究结果表明通过渗水系数和空隙率的双重指标控制可以减少路面结构内部的水分蓄积,降低水损坏的发生概率,改善沥青路面的使用性能。

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