矿物纤维改性橡胶沥青混合料路用性能研究  

Road performance of mineral fibers modified rubber asphalt mixtures

作　　者：周庆坡[1] 张文刚[2] 宋克志[1] 

机构地区：[1]鲁东大学土木工程学院,山东烟台264025 [2]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：《广西大学学报（自然科学版）》2013年第4期892-896,共5页Journal of Guangxi University（Natural Science Edition）

基　　金：交通部西部交通科技项目(2008 318 812 10)

摘　　要：为改善橡胶沥青混合料路用性能,分别掺加两种矿物纤维,通过马歇尔试验、冻融劈裂试验、车辙试验、恒定高度重复剪切试验(RSCH)和低温弯曲试验研究矿物纤维改性橡胶沥青混合料水稳定性及高、低温性能。结果表明:矿物纤维使得沥青混合料的最佳油石比变大,空隙率变小;掺量较小(≤0.1%)时,橡胶沥青混合料各方面性能均有所提高;矿物纤维掺量>0.1%时,S纤维导致橡胶沥青混合料的高、低温性能和水稳定性下降。In order to improve the road performance, two different kinds of mineral fibers were mixed into rubber asphalt mixture. The Marshall test, freeze-thaw splitting test, rutting test, repeat- ed shear test （constant height） （RSCH） and cold bending test were conducted to assess the road performance. It was found that the optimum proportion of asphalt mixture were accreted, but the voids were reduced with the mineral fiber mixed in. The mixture that contains ≤0. 1% mineral fi- bers show the best road performance. When the mixture contains more fibers （ 〉0. 1% ）, its high and low temperature properties and water stability were decreased.

关 键 词：矿物纤维 橡胶沥青混合料 路用性能 

分 类 号：U414[交通运输工程—道路与铁道工程]