级配和压实次数对沥青混合料性能的影响分析  

Anylisis of Effects of Gradation and Compaction Number on Mixture Performance

作　　者：何昌轩[1] 

机构地区：[1]上海市政工程设计研究总院(集团)有限公司,上海200092

出　　处：《武汉理工大学学报》2011年第11期49-54,共6页Journal of Wuhan University of Technology

基　　金：上海市科学技术委员会科研计划项目(10dz1202500)

摘　　要：以混合料的高温动稳定度、低温小梁弯曲应变、浸水马歇尔残留稳定度、劈裂强度、冻融劈裂强度以及AASH-TO T283劈裂强度比为评价指标,探讨集料级配和旋转压实次数对沥青混合料路用性能的影响。研究选取Sup13、Sup20粗、Sup20细3种级配和100次、125次的压实次数,用Tukey-Kramer方法对级配和设计旋转压实次数等水平的试验结果进行均值比较。结果表明:增加设计压实次数可以显著提高沥青混合料的高温动稳定度、低温弯曲破坏应变、劈裂强度和浸水劈裂强度,对混合料的水稳定性提高不显著。在相同设计压实次数下,粗级配相比细级配具有更显著的高温稳定性、低温抗裂性、劈裂强度和浸水劈裂强度,水稳定性相当。在混合料设计时,应优先考虑粗级配进行混合料设计。This study investigates the effects of different aggregate gradations and compaction number on road performance of asphalt mixtures.The dynamic stability,low temperature bending failures strain,soaking marshall stability,AASHTO T283,split strengthen and freeze-thaw split strengthen are used to evaluate the road performance.Three gradations（Sup13,Sup20 coarse and Sup20 fine） and two compaction（100,125） number were selected.Means comparison using Tukey test is used to analyze.Increasing compaction number would bring on higher dynamic stability,low temperature bending failures strain,split strengthen and freeze-thaw split strengthen.Compared with fine gradation,coarse gradation gives higher dynamic stability,low temperature bending failures strain,split strengthens and freeze-thaw split strengthen under the same compaction number.There are no significant differences between water stability with coarse and fine gradation or different compaction number.Coarse gradation is top-priority compared with increasing compaction number.

关 键 词：沥青混合料 级配 压实次数 混合料性能 Tukey-Kramer方法 

分 类 号：U414.75[交通运输工程—道路与铁道工程]