石灰掺加方式对沥青混合料水稳定性的影响  

Effect of Lime Blending Method on Water Stability of Asphalt Mixture

作　　者：马英新[1] 

机构地区：[1]长安大学特殊地区公路工程教育部重点实验室,陕西西安710064

出　　处：《内蒙古公路与运输》2018年第2期10-14,共5页Highways & Transportation in Inner Mongolia

摘　　要：为了研究不同石灰掺加方式对沥青混合料全生命过程中水稳定性产生的影响,采用干法和湿法两种石灰掺加方式,分别向混合料中掺加集料质量2%的石灰,并设置空白对照组,对比三种沥青混合料在原状、短期老化和长期老化之后的浸水马歇尔残留稳定度和冻融劈裂强度比TSR的变化情况。研究结果表明:在沥青混合料整个使用过程中,两种石灰掺加方式在改善沥青混合料水稳定性方面效果相当,没有明显差别;以这两种方法在沥青混合料中掺加石灰后,混合料的浸水残留稳定度和TSR都有明显的提高,且短期老化后提升最明显。In order to study the effect of different lime blending methods on water stability during the whole life process of asphalt mixture, two kinds of lime blending methods,dry method and wet method were used to separately add the lime with 2% of the aggregate quality. The blank control group was set up to compare the residual Marsh stability and the mild freeze-thaw splitting ratio of the three asphalt mixtures after the original, short-term and long-term aging. The results show that in the whole process of using asphalt mixture,the two kinds of lime mixing methods have the same effect in improving the water stability of asphalt mixture,and there is no obvious difference. After mixing lime with these two methods,the residual stability and TSR of the mixture are obviously improved,and the most obvious increase after short-term aging is obtained.

关 键 词：沥青混合料 石灰 掺加方式 全生命过程 水稳定性 

分 类 号：U414[交通运输工程—道路与铁道工程]