摘要
沥青材料的抗老化性能是沥青路面耐久性的关键影响因素,室内模拟老化试验是研究沥青抗老化性能的重要方法.为了对比不同试验方法的老化效果,对5种沥青进行了延时旋转薄膜烘箱老化(RTFOT)、压力老化(PAV)以及自行设计的60℃烘箱老化试验,并与自然老化路面的回收沥青指标进行了对比分析.结果表明,上述3种老化试验方法的老化效果之间有很好的对应性和等效性,都能较好地反应实际路面沥青的长期老化行为;虽然不同方法的老化温度和氧浓度存在差异,但其老化机理都是氧化反应,并无本质区别,认为RTFOT老化试验可以作为模拟沥青长期老化的试验方法.
Resistance to aging performance of asphalt materials is a key factor influencing the durability of asphalt pavement. Laboratory aging simulation test is an important method of studying resistance to aging performance of asphalt. To compare aging effects of different tests, five kinds .of asphalt were aged by rolling thin film oven test（RTFOT） , pressure aging vessel（PAV） aging test and oven aging at 60℃. Data from three simulation aging methods are compared, and then result from simulation aging tests and the data of recovered aged asphalt from field pavement are analyzed. The results and analysis indicate that there are correspondence and equivalence among those aging simulation tests, which can all reflect long - term aging behavior of asphalt in field pavement. Though aging conditions such as temperature and oxygen concentration are different, their aging mechanisms are the same,ie, oxidation reaction. We believe that retardation time RTFOT is a good test of asphalt aging simulation for longterm performance.
出处
《郑州大学学报（工学版）》
CAS
2008年第1期119-123,共5页
Journal of Zhengzhou University（Engineering Science）
基金
西部交通建设科技项目(2006-318-812-21)
