改性沥青混合料拌和及压实温度的确定方法  

An Approach to Determine Mixing and Compaction Temperatures for Modified Asphalt Mixture

作　　者：张争奇[1] 吴瑞环[1] 季社鹏 

机构地区：[1]长安大学教育部特殊地区公路工程重点实验室,陕西西安710064 [2]西安同舟公路工程咨询有限公司,陕西西安710064

出　　处：《公路交通科技》2013年第8期6-11,共6页Journal of Highway and Transportation Research and Development

摘　　要：为研究改性沥青混合料最佳拌和及压实温度的确定方法,根据工作性对沥青混合料压实效果的影响,提出一种确定改性沥青混合料拌和及压实温度的新方法:和易性试验法。通过改性沥青混合料和易性试验,测定不同温度下沥青混合料的工作性(扭矩),绘制沥青混合料工作性和温度的关系曲线。根据基质沥青混合料最优工作性时的扭矩值,在改性沥青混合料的扭矩—温度曲线上,确定改性沥青混合料的最佳拌和与压实温度。最后采用SGC成型试件方法验证压实温度的合理性。结果表明,该法不仅考虑了沥青对压实效果的影响,同时也考虑了矿料及其级配的影响,采用和易性试验法确定的拌和及压实温度更为合理。In order to determine the optimum mixing and compaction temperatures for modified asphalt mixture, considering the influence of workability on the compaction effect of asphalt mixture, a new method （workability test method） for determining the optimum mixing and compaction temperatures for modified asphalt mixture is proposed. Workability test is conducted on several modified asphalt mixtures to measure the workability （torque） of asphalt mixture at different temperatures, and workability-temperature curves of asphalt mixture are drawn. According to the torque at optimum workability of normal asphalt mixture, the optimum mixing and compaction temperatures of asphalt mixture are obtained on the torque-temperature curve of modified asphalt. Finally, the rationality of this method is verified by SGC molding test. The results show that this method not only considered the effect of asphalt on compaction, but also taken the influence of asphalt binder and aggregate gradation into account. The workability test method is more reasonable to determine the mixing and compaction temperatures of modified asphalt mixture.

关 键 词：道路工程 最佳压实温度 和易性试验法 改性沥青混合料 工作性 

分 类 号：U416.217[交通运输工程—道路与铁道工程]