沙中高等级道路沥青抗老化性能的研究

以软化点为参数建立了沥青一级老化动力学模型,为研究沥青抗老化性能提供了一种简便可行的分析方法。并用该动力学模型对用沙中减渣研制的符合Q/SHR003-98标准的AH-70和AH-90两种高等级道路沥青的抗老化性能进行了比较,求得了动力学参数,同时用正戊烷沥青质老化动力学模型和老化指数方法比较了两种沥青的抗老化性能。结果表明,以软化点为参数的动力学模型与用正戊烷沥青质为参数的老化动力学模型以及用老化指数方法分析的结果完全一致,以软化点为参数建立的沥青老化动力学模型,能够很好的描述沥青的老化速率。通过对两种道路沥青抗老化性能的比较,表明AH-90沥青的抗老化性能优于AH-70沥青。

Study on the Anti- Aging Performance of Arabian Vacuum Residue Paving Asphalt

The first order aging kinetic model has been put forward successfully based on softening point, which offered an available and convenient method for studying the asphalt aging behavior. Two paving asphalts, which accorded with the standard of Q/SHR003-98 AH-70 and AH-90 respectively were prepared by Arabian vacuum residue. The aging resistance of two paving asphalts has been compared, and kinetic parameters have been obtained. The aging kinetic model of pentane insoluble and the analytic method of aging index have also been used to compare these two asphalts. The experiments show that the results of the three methods are consistent entirely, which indicats that the present kinetic model is reliable perfectly to describe the aging velocity of asphalt. According to the analyses of the aging performances of these two asphalts, the aging resistance of AH-90 is better than that of AH-70.