集料清洁度对沥青混合料水稳定性的影响研究  

Research on Influence of Aggregate's Cleanness on Asphalt Mixture's Water Stability

作　　者：郭学东[1] 高春妹[1,2] 

机构地区：[1]吉林大学交通学院,吉林长春130022 [2]吉林建筑工程学院交通科学与工程学院,吉林长春130321

出　　处：《公路交通科技》2009年第2期18-21,26,共5页Journal of Highway and Transportation Research and Development

基　　金：吉林省交通科技项目(2007128)

摘　　要：对受到泥土污染的集料进行了水稳定性的试验研究,试验分析了粗、细集料在泥土含量相同的情况下对混合料水稳定性的影响程度,以及在保证集料清洁对沥青用量的影响情况。在此基础上,综合分析了粗、细集料清洁度和沥青用量对沥青混合料水稳定性的影响及分析。研究结果表明:不洁净矿料组成的沥青混合料的水敏感性大于洁净矿料组成的沥青混合料的水敏感性;沥青混合料的水稳定性随着集料含泥量的增加而降低,且细集料的洁净程度影响更为明显;在达到相同的水稳定性指标值情况下,含泥量降低1%左右,可以节省沥青约为0.2%。The water stability test on the aggregate which polluted by clay and powder was conducted. In the test, the influence of coarse and fine aggregates with the same clay content on the water stability, and the influence of clean aggregate on the asphalt dosage were analyzed. On this basis, the influence of cleanness of coarse and fine aggregates and the asphalt dosage on water stability of asphalt mixture was analyzed. The research results show that （1） the water sensitivity of the asphalt mixture which consist of the unclean mineral material is larger than that of the asphalt mixture which consist of the clean one; （2） the higher the clay content of the aggregate, the lower the water stability, and the influence of the fine aggregate cleanness is more obvious; （3） at the same water stability indexes, decreasing clay content per 1% can save asphalt dosage per 0.2%.

关 键 词：道路工程 集料清洁度 沥青混合料 水稳定性 

分 类 号：U414.75[交通运输工程—道路与铁道工程]