沥青混合料时间-应力-温度等效研究.pdfVIP

学兔兔 第14卷第 5期 建 筑 材 料 学 报 Vol_14，NO．5 2011年 1O月 JOURNAL OF BUILDING MATERIALS 0Ct．，2011 文章编号：1007—9629(2011)05—0639—06 沥青混合料时间一应力 日 一胍 度等效研究 裴建中， 张久鹏， 王秉纲 (长安大学特殊地区公路工程教育部重点实验室，陕西西安710064) 摘要：为研究沥青混合料的时间一应力一温度依赖性，对3种沥青混合料进行了不同温度和应力水 平下的静载蠕变试验，分析了温度、应力水平对沥青混合料蠕变特性的影响．结果表明：应力水平 与温度对沥青混合料特征时间的影响相似，具有等效性；可以应用非线性黏弹性体的时间一应力一温 度等效原理，推导出恒力温度位移因子、恒温应力位移因子和温度一应力联合位移因子；将沥青混合 料在其他温度、应力水平下的蠕变曲线移位，可得到参考温度、参考应力水平下的蠕变主曲线．该 研究成果也可为其他黏弹性材料的蠕变研究提供参考． 关键词：沥青混合料；蠕变；时间一应力一温度等效；主曲线 中图分类号：U416．2 文献标志码：A doi：10．3969／j．issn．1007-9629．2011．05．012 Research on Time--Stress--Temperature Equivalence of Asphalt Mixture PEI J ian—zhong， ZHANG J iu—peng， WANG Bing—gang (Key Laboratory for Special Area Highway Engineering of Ministry of Education，Chang’an University， Xi’an 710064。China) Abstract：Firstly，static creep tests of three asphalt mixtures were conducted at different temperatflres and stresses respectively．And then the effects of temperature and stress on creep characteristic were studied． It is indicated that the influence of stress on the creep characteristic is similar to that of temperature for as— phalt mixture，and the stress can be considered to exert the same effect on the viscosity as temperature． Finally，the time—stress—temperature equivalence principle of nonlinear viscoelastic material was applied and the time—temperature shift factor，the time—stress shift factor and the time—stress—temperature shift factor were also obtained．By using the time—stress—temperature shift factor，the creep curves at different temper— atures and stresses could be shifted into a master cur