沥青室内模拟老化性能研究

介绍了沥青的老化过程，针对道路沥青的特点，分别用热氧老化试验、光氧老化试验室内模拟沥青的“短期老化”和“长期老化”；采用热氧老化、光氧老化的试验方法．对重交通沥青AH-70和AH-90在热氧老化和光氧老化过程中各项指标的变化规律进行了对比分析。结果表明：随着老化时间的增加，AH-70和AH-90沥青的针入度降低，延度减小，软化点升高，粘度增大；在相同条件下，AH-70号沥青的抗热氧老化和抗光氧老化的能力要强于AH-90号沥青；紫外光也会使沥青产生老化现象，但温度是沥青老化的主要因素。

Study on laboratory simulation ageing property of asphalt

The process of asphalt ageing was introduced;thermal oxidation and photo oxidation were used to simulate short-term ageing and long-term ageing in laboratory respectively according to the characteristic of road asphalt.There were analyses on the change law of various indexes in the ageing process of AH-70 and AH-90,and a contrast with the test results between thermal oxidation and photo oxidation.The result showed that softening point and viscosity increased,penetration and ductility decreased with the agei...