基于DSR试验的生物重油再生沥青流变性能评价  

Rheological Property Evaluation of Heavy Bio-oil Recycled Asphalt Based on DSR Test

作　　者：范世平 朱洪洲[1,2] 钟伟明 FAN Shiping;ZHU Hongzhou;ZHONG Weiming(School of Civil Engineering,Chongqing Jiaotong University,Chongqing 400074,China;National Local Joint Laboratory of Materials for Transportation Civil Engineering,Chongqing Jiaotong University,Chongqing 400074,China;Hunan Communications Research Institute Co.,Ltd.,Changsha 410015,China)

机构地区：[1]重庆交通大学土木工程学院,重庆400074 [2]重庆交通大学交通土建工程材料国家地方联合实验室,重庆400074 [3]湖南省交通科学研究院有限公司,湖南长沙410015

出　　处：《建筑材料学报》2022年第3期320-326,共7页Journal of Building Materials

基　　金：高寒高海拔地区道路工程安全与健康国家重点实验室开放基金资助项目(YGY 2017 KYPT-02);重庆交通大学研究生科研创新项目(CYB21211)。

摘　　要：为研究生物重油再生沥青的流变性能,将生物重油掺入经旋转薄膜烘箱试验(RTFOT)老化的70#沥青和SBS改性沥青中制备生物重油再生沥青,通过动态剪切流变(DSR)试验研究了沥青的流变性能.结果表明:生物重油的掺入提高了老化沥青的抗疲劳性能、低温抗裂能力和黏性比例,降低了高温抗车辙性能;低频加载易使沥青产生不可恢复的永久性变形;生物重油对70#老化沥青的再生效果优于老化SBS改性沥青;建议生物重油掺量宜为4%,该掺量下再生沥青的性能可恢复至原样沥青.To study the rheological properties of heavy bio-oil recycled asphalt,the heavy bio-oil was mixed into 70#asphalt and SBS modified asphalt aged by rotary film oven test(RTFOT)to prepare heavy bio-oil recycled asphalt,and the rheological properties were investigated via dynamic shear rheology(DSR)test.The results show that the fatigue resistance,low-temperature crack resistance and viscosity ratio of aged asphalt are improved and the high-temperature rutting resistance is reduced after mixing with heavy bio-oil.The asphalt is subject to irrecoverable permanent deformation at low frequency loading.The improvement effect of heavy bio-oil on 70#aged asphalt is better than that of SBS modified asphalt.In addition,it is suggested that the suitable content of heavy bio-oil is 4%,because the properties of recycled asphalt are restored to the original asphalt at this content.

关 键 词：生物重油再生沥青 流变性能 RTFOT试验 DSR试验 疲劳性能 高温稳定性 

分 类 号：U414[交通运输工程—道路与铁道工程]