粗集料棱角性对OGFC多孔沥青混合料性能的影响  

Influence of coarse aggregate angularity on the performance of open-graded friction courses

作　　者：胡力群[1] 熊伟明 王军[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,西安710064 [2]杭州光华路桥工程有限公司,杭州311201

出　　处：《功能材料》2014年第20期20150-20154,共5页Journal of Functional Materials

基　　金：国家重点基础研究发展计划(973计划)前期研究专项资助项目(2012CB626814);交通运输部"交通青年科技英才"培养资助项目(2012-16);中央高校基本科研业务费专项资金资助项目(CHD2011TD014)

摘　　要：采用洛杉矶磨耗机对粗集料进行不同程度磨耗后,按照OGFC-10、OGFC-13和OGFC-16等3种级配制备了12种OGFC沥青混合料。在室内借助集料图像测量系统得到了不同OGFC沥青混合料的粗集料棱角性综合值Ic,并测试了各沥青混合料的相关路用性能。结果表明,当集料级配相同时,粗集料棱角性下降会造成OGFC沥青混合料马歇尔稳定度、动稳定度、空隙率和抗滑性能均有明显下降,但对渗水性能影响不大。当集料级配不同时,3种OGFC沥青混合料中,随着粗集料棱角性综合值Ic的下降,OGFC-16的马歇尔稳定度、动稳定度和抗滑性能下降最明显,OGFC-10的空隙率下降最明显。In the paper,12 kinds of open-graded friction courses（OGFC） mixtures were prepared according to the gradation of OGFC-10,OGFC-13 and OGFC-16,the coarse aggregatesused in the OGFC mixture were worn in different degree by using los angeles abrasion machine.Then coarse aggregate angularity composite values（Ic） of 12 OGFC mixtures were got by using aggregate imaging measurement system and the road performances of these OGFC samples were tested.The results showed that when the aggregate gradation of the OGFC mixture were the same,the marshall stability,dynamic stability,porosity and skid resistance performance of OGFC decreased along with the decrease of coarse aggregate angularity value significantly,but the permeability performance of these OGFC change slightly.When the aggregate gradation of the OGFC mixtures were different,marshall stability,dynamic stability and skid resistance performance of OGFC-16 and porosity of OGFC-10 decreased obviously along with the decrease of coarse aggregate angularity composite values（Ic）.

关 键 词：粗集料 棱角性 OGFC沥青混合料 强度 空隙率 路用性能 

分 类 号：U214.75[交通运输工程—道路与铁道工程]