摘要
对50#、70#和90#三种不同标号基质沥青进行旋转薄膜烘箱(RTFOT)与薄膜烘箱(TFOT)老化,得到老化残留物分别与原样沥青在软化点、针入度、粘度和车辙因子等各项指标上进行对比分析。结果表明:两种老化方式对50#和70#沥青的老化效果相当,规范中认为RTFOT和TFOT两种老化方式可以互相取代的观点是正确的。对于90#沥青,由于通过两种老化方式后的沥青残留物与原样沥青性能上的非同一性,认为两种老化方式对90#沥青的老化程度是不同的,是否可以替代需要做进一步研究。
Comparative analysis between the original un-aged asphalt and the aged residues obtained from 50#,70#and 90# with rotating thin film oven test （RTFOT） and thin film oven test （TFOT） has been conducted re-spectively on viscosity, softening point, penetration and rutting factors. Results have shown that the aging effectof 50# and 70# asphalt by both RTFOT and TFOT is equivalent, so the view of mutual replacement between RT-FOT and TFOT in the Specifications is right. While, as far as 90# asphalt is concerned, because of the differ-ences existing between the original asphalt and aged residues through the two aging ways, the aging effect of RT-FOT and TFOT are different for 90# asphalt, so further research is necessary for the mutual replacement of thetwo methods.
出处
《广东公路交通》
2016年第2期10-14,共5页
Guangdong Highway Communications
