Evotherm温拌再生沥青流变特性  

Rheological Properties of Evotherm Warm Mix Recycled Asphalt Binders

作　　者：尚海龙 Shang Hailong(Inner Mongolia communication Design&Research Institute Co.,Ltd.,Hohhot 010010,China)

机构地区：[1]内蒙古交通设计研究院有限责任公司,内蒙古呼和浩特010010

出　　处：《湖南科技大学学报（自然科学版）》2020年第1期56-61,共6页Journal of Hunan University of Science And Technology：Natural Science Edition

基　　金：山西省基础研究计划项目(2015021074)。

摘　　要：为探究RAP料中回收沥青掺量对温拌再生沥青流变性能的影响,在Evotherm温拌沥青中分别掺量0%,10%,20%,30%,40%和50%的回收沥青制备温拌再生沥青.采用粘度试验、温度扫描试验和弯曲梁流变试验分别对温拌和热拌再生沥青的流变性能进行对比研究,并对温拌再生混合料的路用性能进行了验证.试验结果表明:Evotherm温拌再生沥青的流变性能优于热拌再生.随着回收沥青结合料掺加的增加,温拌再生沥青的粘度值、车辙因子、破坏温度值和蠕变劲度S值逐渐增大,而蠕变速率m逐渐变小,说明Evotherm温拌再生沥青和易性变差,高温性能变好,而低温抗裂性能变差.另外,掺加40%RAP料的温拌再生沥青混合料具有优良的路用性能.并建议回收沥青结合料的掺量为40%.In order to investigate the effect of recycled asphalt content on the rheological properties of warm-mix asphalt,the warm-mix recycled asphalt was prepared by adding 0%,10%,20%,30%,40%,and 50%recycled asphalt to Evotherm warm-mix asphalt. The rheological properties of warm mix and hot mix recycled asphalt were studied by viscosity test,temperature sweep test and bending beam test,and then the pavement performance of warm mix recycled mixture was verified. The results show that the rheological property of Evotherm warm mix asphalt is better than that of hot mix recycled asphalt. With the increase of recycled asphalt binder,the viscosity value,rutting factor,failure temperature and creep stiffness S value of warm mix recycled asphalt increased gradually,while the creep rate m decreased gradually,indicating the high temperature performance of Evotherm warm mix recycled asphalt becomes better,but its workability and low temperature crack resistance becomes worse. In addition,the warm mix recycled asphalt mixture with 40% RAP material has excellent road performance. It is suggested that the content of recycled asphalt binder is 40%.

关 键 词：温拌沥青 再生沥青 流变性能 掺量 

分 类 号：U414.1[交通运输工程—道路与铁道工程]