大粒径沥青混合料级配离析测量和评价方法  

Evaluation Method of Gradation Segregation of Large Size Asphalt Mixture

作　　者：刘红瑛[1] 叶松[1] 谭发茂[1] 陈治君[1] 

机构地区：[1]长安大学道路结构与材料交通行业重点实验室,陕西西安710064

出　　处：《郑州大学学报（工学版）》2014年第2期24-27,共4页Journal of Zhengzhou University（Engineering Science）

基　　金：国家自然科学基金资助项目(51278060)

摘　　要：沥青混合料离析是造成沥青路面局部损坏的根本原因之一,大粒径沥青混合料由于粗集料含量多,因此比一般的沥青混合料更容易产生集料离析.笔者采用自行开发的一种集料离析测量仪评价了大粒径沥青混合料的离析特性,通过对5种不同级配沥青混合料进行离析试验,验证了测定方法的可靠性.试验结果表明:采用贝雷法设计的大粒径沥青混合料相对于普通AC型沥青混合料具有较强的抗离析性能;采用前后料仓集料通过率之差可以有效评价沥青混合料的集料级配离析.The gradation segregation of asphalt mixture is one of the causes of early damage of asphalt pavement; the large size asphalt mixtures have more prone to aggregate segregation due to the coarse aggregate content more than the normal asphalt mixes.This paper developed the measuring instrument of the aggregate segregation of asphalt mix.The different types of asphalt mixes with five gradations had done the gradation segregation test,its reliability was verified.The test results show that large size asphalt mixture using Bailey method design had the strong resistance to segregation characteristics than AC type asphalt mixture ; the aggregate pass rate difference between before and after stockbin was suggested to evaluation asphalt mixture gradation segregation.

关 键 词：大粒径沥青混合料 级配 离析 评价 指标 

分 类 号：U416.61[交通运输工程—道路与铁道工程]