摘要
通过不同老化程度和不同温度下AC-13C型沥青混合料的应力松弛试验,结合时间-温度的等效关系原理和WLF公式分析,得到了不同老化程度沥青混合料的松弛模量主曲线簇及其黏弹性参数值;以材料黏度的自由体积理论为基础,推导出了沥青混合料的老化程度与温度、时间之间的等效关系式,并通过已有应力松弛试验数据进行了验证.结果表明:老化后的沥青混合料应力松弛特性可以用未老化沥青混合料在较低温度或较低荷载作用时间下的性能来分析.
Through stress relaxation test at different temperature and different aging degree of asphalt mixture of AC-13C,relaxation modulus master curves and viscoelastic parameters of asphalt mixture at different aging degree were obtained according to time-temperature equivalence principle and WLF equation. Based on the free-volume-theory of material viscosity,the equivalent relation between aging and temperature of asphalt mixture is deduced,and it is proved by the stress relaxation test of aging asphalt mixture. The results show that the stress relaxation property of aging asphalt mixture can be obtained by that of unaged asphalt mixture under the situation of low-temperature of short time loading.
出处
《建筑材料学报》
EI
CAS
CSCD
北大核心
2011年第3期340-344,共5页
Journal of Building Materials
基金
国家自然科学基金资助项目(50408007/E080703)
关键词
沥青混合料
老化
时温等效
应力松弛
自由体积理论
asphalt mixture
aging
time-temperature equivalence
stress relaxation
free-volume-theory
