沥青混合料体积指标对路用性能的影响  

Influence of spatial distribution on road performance of asphalt mixtures

作　　者：王家舒 高英[1] WANG Jiashu;GAO Ying(School of Transportation,Southeast University,Nanjing,Jiangsu 210096,China)

机构地区：[1]东南大学交通学院,江苏南京210096

出　　处：《江苏大学学报（自然科学版）》2018年第5期604-610,共7页Journal of Jiangsu University：Natural Science Edition

基　　金：国家自然科学基金资助项目(51108081)

摘　　要：选取体积指标VMA和VV来表征混合料的空隙率,以VCAratio来表征混合料骨架的紧密程度,并选择了一系列高温性能、低温性能及水稳定性指标,研究了路用性能指标随空间结构指标的变化关系.研究表明:VMA和VCAratio可以较好区分混合料的空间结构;VMA对沥青混合料的低温性能和水稳定性影响较大,对高温性能影响较小;VCAratio对沥青混合料高温性能影响较大,而对低温性能、水稳定性影响较小.具体表现如下:当VMA增大较多时,沥青混合料的低温性能和水稳定性急剧下降;随VCAratio的不断减小,高温性能逐渐增强,尤其是在VCAratio=1的临界点上,高温性能发生急剧变化.The volume indexes of VMA and VV were chosen to characterize the voidage of asphalt mixtures,and the VCA ratio was used to characterize the compactness of skeleton structure with the indexes of high temperature performance,low temperature performance and water stability to establish the relationship between spatial distribution and road performance.The results show that VMA and VCA ratio can well distinguish the spatial distribution of mixtures.The low temperature performance and the water stability of asphalt mixtures are greatly affected by VMA,while the high temperature stability is less sensitive to VMA.The VCA ratio has great effect on the high temperature stability with less effect on the low temperature performance and the water stability.When the value of VMA is increased much,the low temperature performance and the water stability of asphalt mixtures are decreased sharply.With the decreasing of VCA ratio,the high temperature performance is increased gradually.At the critical point of VCA ratio equal to 1,the high temperature performance changes dramatically.

关 键 词：沥青混合料 空间结构 高温性能 低温性能 水稳定性 

分 类 号：U414.1[交通运输工程—道路与铁道工程]