水温冻融循环条件下沥青混合料性能衰变的规律  

Attenuated performance of asphalt mixture under freeze-thaw cycle with water and temperature

作　　者：郑健龙[1] 张洪刚[1] 钱国平[1] 黄慧[1] 

机构地区：[1]长沙理工大学交通运输工程学院,湖南长沙410004

出　　处：《长沙理工大学学报（自然科学版）》2010年第1期7-11,共5页Journal of Changsha University of Science and Technology:Natural Science

基　　金：湖南省交通厅科技资助项目(200816)

摘　　要：在我国北方寒冷地区或南方部分地区遭遇突变冰雪天气时,路面材料长时间处于有水、低温冰冻状态及温度交替变化过程中,因水分和温度共同作用引起的冻融损坏现象较为普遍.通过测试冻融过程中试件内部温度的变化,确定了室内冻融循环试验方案,分析了有水条件下冻融0,5,10,15,20次后沥青混合料的空隙率、抗压强度和冻融劈裂强度的变化规律.研究结果表明,沥青混合料的强度和水稳定性能受多次反复冻融影响衰减显著.Pavement materials exposed to water,frozen state at low-temperature and alternative temperatures when the weather changed suddenly at cold areas in northern or some southern part of China.Freeze-thaw damage is very universal due to moisture and temperature.The temperature variation of specimen was gotten in the freeze-thaw process and freeze-thaw cycle test was determined by laboratory test.The variation was analysed on Void,Compressive strength,Freeze-thaw splitting strength of asphalt mixture after 0 times,5 times,10 times,15 times,20 times reeze-thaw cycles.The results showed that strength and water stable performance of asphalt mixture attenuated significantly after freeze-thaw cycle repeatedly.

关 键 词：沥青混合料 冻融循环 空隙率 抗压强度 残留稳定度 冻融劈裂强度比 

分 类 号：U416.1[交通运输工程—道路与铁道工程]