沥青延迟时间谱的计算及应用  

Calculation and Application of the Retardation Time Spectra of Asphalt

作　　者：詹小丽[1] 张肖宁[2] 卢亮[2] 薛忠军[1] 

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]华南理工大学交通学院,广东广州510640

出　　处：《公路交通科技》2007年第12期38-41,共4页Journal of Highway and Transportation Research and Development

基　　金：交通部西部交通建设科技资助项目(200131822341)

摘　　要：通过对3种沥青静态蠕变试验、动态试验和沥青粘弹性性能的分析,研究了沥青的粘弹性能,得到了3种沥青的蠕变柔量曲线和动态柔量曲线。采用非线性回归法计算分析了沥青的离散延迟时间谱,通过延迟时间谱将沥青的动态柔量转换为蠕变柔量,并将转换值与实测值进行了对比分析。结果表明,转换值与实测值偏差较小,离散时间谱可以很好地转换沥青的动、静态粘弹函数,且物理意义明确。同时,通过比较得知根据短时的蠕变数据可以很好地预测长时的蠕变数据。因此延迟时间谱可以很好地预测沥青的蠕变性能。Based on the static creep test and dynamic test of three kinds of asphalt, the creep compliance curves and dynamic compliance curves are obtained, and the viscoelastic properties of asphalt are analyzed. It is well known that the retardation time spectra of asphalt are critical for viscoelastic functions, all viscoelastic functions belong to the same retardation time spectra. The discrete retardation time spectra are calculated using non-linear regression method according to the data of creep compliances and dynamic compliances. The dynamic compliances of asphalt converted to creep compliances in short time are used to predict creep compliances in long time. The result shows that retardation time spectra can accurately convert static dynamic viscoelastic functions and predict creep characteristic of asphalt.

关 键 词：道路工程 延迟时间谱 非线性回归法 蠕变柔量 储存柔量 主曲线 

分 类 号：U414.03[交通运输工程—道路与铁道工程]