反复凝冰作用下沥青混合料性能研究  

Performance of Asphalt Mixture under Repeated Condensation of Ice

作　　者：谭忆秋[1] 赵立东[1] 蓝碧武 陈克群 

机构地区：[1]哈尔滨工业大学交通科学与工程学院,黑龙江哈尔滨150090 [2]广东省公路勘察规划设计院股份有限公司,广东广州510630 [3]贵州省高等级公路管理局,贵州贵阳550003

出　　处：《建筑材料学报》2011年第6期761-766,792,共7页Journal of Building Materials

基　　金："十一五"国家科技支撑计划项目(2008BAG10B02)

摘　　要：针对南方高原潮湿路面,采用沥青路面上面层常用密级配AC-16混合料,首先根据实际情况制定了反复凝冰的试验条件,然后对经历不同凝冰次数的试件进行体积指标、力学性能、高低温性能以及水稳定性等各项性能的试验研究,分析反复凝冰对混合料各项性能的影响.结果表明:混合料的初始空隙率对反复凝冰过程中的混合料空隙率有重大影响;高温稳定性随着凝冰次数的增加而衰减;力学性能、水稳定性以及低温性能在反复凝冰后都有不同程度的衰减,约前8次衰减较快,之后趋于平缓.The influence of repeated condensation of ice on volume indexes,mechanical properties,high and low temperature performance and water stability of asphalt mixture were analyzed through related experiments. For southern plateau wet pavement,the dense gradation AC-16 mixture was adopted in experiments, which was used to be the top layer of local asphalt pavement.The experimental condition was established according to actual condition,and kinds of performance experiments were executed with specimens under different condensation of ice.The results show that the initial void plays major role on the void of mixture during repeated condensation of ice.The high temperature stability of mixture decreases with the increase of repeated condensation of ice.The mechanical properties,water stability,and low temperature properties of mixture have different degree of attenuation after repeated condensation of ice,which decay rapidly at about first 8 cycles,then tends to be stable.

关 键 词：沥青混合料 反复凝冰 体积参数 力学性能 路用性能 

分 类 号：U416.217[交通运输工程—道路与铁道工程]