表征沥青及沥青混合料性能的流变学模型

A Rheological Model Representing the Deformation Behavior of Asphalt Mixtures

本文结合由高、低温蠕变实验所得到的沥青混合料的变形特性,在分析现有流变学模型性能的基础上,提出了一种能较准确地表征沥青混合料变形特性的流变学模型,推导了其蠕变方程,并通过蠕变实验结果确定了材料的模型参数,为采用流变学理论和粘弹性理论研究沥青混合料及沥青路面奠定了基础。

A rheological model named 'Four-unit, Five-Parameter' is efficently created on the basis of deformation behavior analysis of asphalt mixsures and existed rheological models, and its creep equation is also derived. The Parameters of the new model are obtained from the data of tensile and compression creep tests at low and high temperatures by using curve simulition method, and the correlation coefficients(R) of this procedure are approximately equal to 1.0 (R≈1.0), which indicates that the new model can represent asphalt mixtures quite better than others, and therefore the reliability of the model is vetired.