ABSTRACT

Performance of asphalt concrete pavement significantly degrades during the aging of asphalt binders. The master curves of complex shear modulus and phase angle are recognised as useful tools to characterise the rheological properties of aging asphalt binders. The main shortcoming of existing master curves is that the effects of aging cannot be captured and predicted effectively. This study developed a new method to construct such aging master curves that can be extended to predict the complex shear modulus and phase angle at a wide range of aging time and temperature. The DSR tests were conducted on three different types of asphalt binders with three aging temperatures and four aging durations. The master curves of complex shear modulus and phase angle were constructed for aging asphalt binders through time-temperature-aging shift by performing both rotation and horizontal aging shift. Rotation and horizontal aging shift were determined as the function of aging time and aging temperature. Therefore, it becomes possible and convenient to construct single aging master curves at a wide range of aging temperature and aging time.

摘要

沥青混凝土路面的性能在沥青结合料老化过程中显着降低。复剪切模量和相角的主曲线被认为是表征老化沥青粘合剂流变特性的有用工具。现有主曲线的主要缺点是无法有效捕捉和预测老化的影响。本研究开发了一种构建此类老化主曲线的新方法，该方法可以扩展以预测在很宽的老化时间和温度范围内的复杂剪切模量和相位角。DSR 测试是在三种不同类型的沥青粘合剂上进行的，具有三种老化温度和四种老化持续时间。通过旋转和水平时效偏移，构建时效-温度-时效偏移时效沥青胶结料的复剪切模量和相角主曲线。旋转和水平时效偏移被确定为时效时间和时效温度的函数。因此，在较宽的时效温度和时效时间范围内构建单一时效主曲线变得可能和方便。