摘要
通过控制不同紫外老化时间和老化温度,研究两种变量对高紫外辐照下的沥青紫外老化的影响和沥青紫外老化机理.钻芯取样后进行紫外老化实验,然后抽提沥青测量其性能.流变性能测试结果表明,老化时间越长,结果越偏离规范老化;老化温度越高,光热耦合老化现象越严重.红外测试结果显示,沥青中某些基团吸收紫外光能量后被氧化生成羰基,SBS改性剂吸收能量后被氧化降解.在本实验所采用的条件下,温度比老化时间对老化程度影响更大,促进老化作用更为明显.
The effects of two variables on the UV aging of asphalt and the aging mechanism of asphalt were studied by controlling different UV aging time and different aging temperature.The UV aging test was carried out after drilling samples,and the performance was measured after extracting the asphalt.The results of rheological properties show that the longer the aging time,the aging results further deviation from the standard;the higher the aging temperature,the more severe of light-heat coupling aging.The results of FTIR show that some of the groups have been oxidized to carbonyl after absorbing ultraviolet light energy in the asphalt,the SBS modifier is oxidized and degraded after absorbing energy.Under the conditions used in this experiment,the parameter temperature has a greater effect on the aging degree than aging time,and the aging effect is more obvious.
出处
《武汉理工大学学报（交通科学与工程版）》
2018年第1期149-153,共5页
Journal of Wuhan University of Technology（Transportation Science & Engineering）
基金
国家重大科学仪器设备开发专项项目资助(2013YQ160501)
