基于动态蠕变性能的沥青延迟时间谱研究  

Study of Retardation Time Spectrum of Asphalt Based on Dynamic Creep Performance

作　　者：詹小丽[1] 张肖宁[1] 王端宜[1] 卢亮[1] 

机构地区：[1]华南理工大学交通学院,广东广州510640

出　　处：《中国公路学报》2008年第2期34-38,共5页China Journal of Highway and Transport

基　　金：国家西部交通建设科技项目(200131822341)

摘　　要：为了更好地描述沥青的动态黏弹性能,通过动态剪切流变仪测定了沥青在不同频率下的动态蠕变性能,采用广义Voigt模型来拟合沥青的动态柔量曲线,根据多元非线性回归法计算出描述沥青蠕变性能的延迟时间谱,并且通过延迟时间谱将沥青的动态柔量转换为静态蠕变柔量。结果表明:延迟时间谱能很好地表征沥青的动态蠕变性能,根据延迟时间谱可以很好地转换沥青动静态黏弹函数,从而可以在更宽的频率和温度范围内研究沥青的黏弹性能。In order to research the dynamic viscoelastic performance of asphalt, the dynamic creep performances of asphalt at different frequencies of asphalt were measured using dynamic shear rheometer. Generalized Voigt models were used to fit dynamic compliance curve. The retardation time spectrum of asphalt was attained using non-linear regression method. Moreover, the dynamic creep compliances of asphalt were converted to static creep compliances based on the retardation time spectrum. The result shows that retardation time spectrum can correctly fit dynamic creep performance of asphalt, and the retardation time spectrum can convert static dynamic viscoelastic functions of asphalt accurately. So it is possible to study viscoelastic performance of asphalt within more wide frequency and temperature.

关 键 词：道路工程 沥青结合料 非线性回归法 延迟时间谱 动态蠕变性能 

分 类 号：U414.1[交通运输工程—道路与铁道工程]