基于毛体积密度的WMA压实温度的确定及路用性能研究  

Determination of Compaction Temperature and Research on Pavement Performance of WMA Based on Bulk Density

作　　者：肖鑫[1] 黄开斌 张肖宁[1] 

机构地区：[1]华南理工大学土木与交通学院,广东广州510641 [2]广西钦州临海工业投资有限责任公司,广西钦州535018

出　　处：《公路交通科技》2013年第3期7-12,共6页Journal of Highway and Transportation Research and Development

摘　　要：选取常用的2种温拌改性剂EC120和Sasobit,采用毛体积密度作为衡量压实效果的指标,将最大密度对应的温度视为最佳压实温度,在此温度下成型沥青混合料试件,并通过浸水马歇尔试验、冻融劈裂试验、车辙试验、弯曲试验和疲劳试验研究温拌沥青混合料的路用性能。试验结果表明:这2种温拌改性剂均能提高沥青的高温性能、抗变形能力和感温性能,但沥青的低温性能稍有下降;温拌沥青混合料的水稳定性、高温稳定性和抗疲劳性能均好于热拌沥青混合料,但低温抗裂性比热拌沥青混合料略差。最后通过试验路的铺筑进一步证明了温拌沥青混合料的路用性能良好。Choosing two common warm mix modifiers （EC120 and Sasobit）, adopting bulk density as the index to measure the effect of compaction, taking the temperature corresponding to the maximum density as the optimum temperature, the asphalt mixture sample is formed under this temperature, and the road performance of the warm mix asphalt is studied through immersion Marshall test, freeze-thaw split test, rutting test, bending test and fatigue test. The experimental result shows that （ 1 ） the 2 modifiers can both improve asphalt＇s high temperature performance, deformation resistance and temperature sensitivity, while the low temperature performance of the asphalt is decreased a little; （2） the water stability, high temperature stability and fatigue resistance of the warm mix asphalt are all better than hot mix asphalt, while the low temperature crack resistance is mildly worse than that of hot mix asphalt. The paving of the experimental road further proved the betterment of the warm mix asphalt.

关 键 词：道路工程 温拌沥青混合料 试验 路用性能 温拌改性剂 

分 类 号：U414.75[交通运输工程—道路与铁道工程]