沥青抗老化指标探讨  

Study on Aging-resistant Index of Asphalt

作　　者：汪东杰[1] 葛折圣[2] 黄晓明[2] 田志强[1] 

机构地区：[1]杭州市交通设施建设处,浙江杭州310005 [2]东南大学交通学院,江苏南京210018

出　　处：《公路交通科技》2003年第3期15-18,共4页Journal of Highway and Transportation Research and Development

摘　　要：在现行规范中只有评价沥青短期老化的指标,而在使用期间的老化却没有相应的评价方法。本研究利用美国的压力老化容器对两种沥青进行不同时间的老化,考察各老化阶段残留物的常规指标随老化时间的变化情况。试验数据表明,对所选用的两种沥青而言,短期老化后残留物的部分老化指标能够预示长期抗老化能力,可以作为评价沥青抗老化能力的依据。这个结论可以为深入研究适合我国国情的抗老化指标提供参考。In the current specifications, there are indexes used to assess asphalt aging-resistant performance in short term only and there is no corresponding method to evaluate the aging in operation period. This study reviews the variation of the conventional indexes with aging time, based on the test of the indexes of the leftovers of the asphalt samples in different aging period, by use of PAV made in USA. The test data indicate that, for the selected two different asphalt, some indexes of the leftovers after TFOT 5 hours may indicate long term aging-resistant performance of asphalt and may serve as indicators for assessment of asphalt.

关 键 词：沥青 老化 压力老化容器 指标 公路材料 

分 类 号：U414.75[交通运输工程—道路与铁道工程]