摘要
针对不同设计规范选取抗压回弹模量和动态模量作为设计参数进行沥青路面设计,通过测试AC-13、SMA-13和Sup-20三种级配的沥青混合料试件的抗压回弹模量和动态模量,对其优缺点进行对比分析,研究不同温度及荷载作用频率对动态模量的影响,并对参考温度下的动态模量主曲线进行回归。结果表明:相同温度下的抗压回弹模量值仅对应于某一缩减时间下的动态模量值,因此动态模量能更全面地反映沥青混合料不同荷载作用下的力学性能。
In allusion to different design specifications, this paper selects the compressive modulus of resilience and dynamic modulus as design parameters to perform design of asphalt pavement. By testing the compressive modulus of resilience and dynamic modulus of asphalt mixture test pieces at AC-13 , SMA-13 and Sup-20 grading, the paper makes comparative analysis of their advantages and disadvantages, studies influences of different temperatures and loads on the dynamic modulus, and regresses main curve of the dynamic modulus at the reference temperature. The result shows that the compressive modulus of resilience at the same temperature is only corresponding to dynamic modulus value at some reduced time, therefore, the dynamic modulus can reflect mechanical properties of asphalt mixture at different loads more comprehensively.
出处
《公路交通技术》
2014年第2期20-23,共4页
Technology of Highway and Transport
基金
交通运输部西部交通建设科技项目(200831800099)
关键词
沥青路面设计参数
抗压回弹模量
动态模量
主曲线
缩减时间
Design parameters of asphalt pavement
compressive modulus of resilience
dynamic modulus
main curve
reduced time
