基质沥青老化过程中基本指标和组分变化的研究

Research on Changing of Fundamental Indices and Constituents of Matrix Asphalt During Aging

鉴于中国的现行规范都是根据沥青薄膜试验后沥青三大指标的变化来确定沥青的老化程度,通过对不同时间、不同温度的沥青薄膜试验进行研究,分析了沥青在老化过程中基本指标和组分的变化规律,提出了对沥青薄膜试验(TFOT,163℃,5h)的改进方法,为沥青老化的评价提供了新的判定指标。

Since the specification currently used in China determines the aging of asphalt by the changing of three indices of it following the TFOT, TFOT was carried out at various time and temperature, and the rules of changing of the fundamental indices and constituents were analyzed. Method for improvement of TFOT（163℃ ,5 h） was put forward, and new determining index of asphalt aging was set.