短期老化对橡胶粉改性沥青流变性能的影响  

Effect of short term aging on rheological properties of crumb rubber modified asphalt

作　　者：王岚[1] 王宇[1] 邢永明[1] 胡江三 

机构地区：[1]内蒙古工业大学土木工程学院

出　　处：《中国轮胎资源综合利用》2017年第4期38-44,共7页China Tire Resources Recycling

摘　　要：为探究短期老化作用对橡胶粉（CR）改性沥青性能的影响,针对经旋转薄膜烘箱实验（RTFOT）老化前后的CR改性沥青,进行动态剪切流变实验（DSR）和重复蠕变恢复实验（RCRT）得出相应流变参数,并结合扫描电子显微镜（SEM）从细观的角度观察沥青内部结构变化及其对沥青流变性能的影响。结果表明：老化作用引起沥青组分的变化,使沥青表现出硬化现象;老化作用对CR改性沥青的变形恢复能力和变形影响随温度升高而减小;老化作用和温度的影响大于应力对其影响;随温度的升高,老化作用对CR改性沥青流变性能影响变弱。In order to explore the effect of short--term aging on crumb rubber（CR）powder modified asphalt, the rheological parameter of before and after aging CR modified asphalt by rolling thin fihn oven test（RTFOT） was obtained through dynamic shear rheological（DSR）and repeated creep recov-ery test（RCRT）. The change in the internal structure of asphalt was observed from microscopic per-spective by SEM and the effect of asphalt rheological properties was analysed. Results show that the component of asphalt changes after aging and asphalt shows hardening phenomenon. The effect of ag--ing on the deformation recovery capability and deformation of CR modified asphalt decreases as the temperature increases. The influence of aging and temperature on the CR modified asphalt is greater than that of the stress; with the temperature increasing, the effect of aging on the rheological property of CR modified asphalt is weakened.

关 键 词：流变性能 动态剪切流变实验 重复蠕变恢复实验 短期老化 变形恢复能力 

分 类 号：U414[交通运输工程—道路与铁道工程]