摘要
为进一步提升材料的黏结能力与耐久性,特研发HVA-H高黏改性剂,使用此种改性剂与SBS改性沥青在合理剪切工艺下,制备出一种高黏改性沥青。通过荧光显微镜观察HVA-H高黏改性剂掺量分别为4%、6%、8%、10%时高黏改性沥青的分散性,确定最佳掺量,并将其与试验室原有的高黏改剂和其他厂家高黏改性剂进行对比分析。结果表明:HVA-H高黏改性剂最佳掺量为8%,HVA-H高黏改性沥青高低温性能优于HVA高黏改性沥青和其他厂家高黏改性沥青,且拉伸柔量指标与BBR试验结果之间存在相关性,可精确评价改性沥青的低温性能;Carreau模型比Cross模型拟合精度更高,在实际应用中可通过Carreau模型拟合零剪切黏度,对研究改性沥青高温性能有较好的指导作用。
In order to solve the problem of insufficient durability of drainage asphalt pavement,HVA-H high viscosity modifier was specially developed.Using this modifier and SBS modified asphalt,a high viscosity modified asphalt was prepared under reasonable shear process.Observed the dispersion of HVA-H high viscosity modified asphalt when the content of HVA-H high viscosity modifier was 4%,6%,8%and 10%respectively by fluorescence microscope,determined the best content,and compared it with the original high viscosity modifier in the laboratory and the high viscosity modifier of other manufacturers.The results show that the optimum content of HVA-H high viscosity modifier is 8%,the high and low temperature performance of HVA-H high viscosity modified asphalt is better than that of HVA high viscosity modified asphalt and other high viscosity modified asphalt manufacturers,and there is a correlation between the tensile compliance index and the BBR test results,which can accurately evaluate the low-temperature performance of modified asphalt.Carreau model has higher fitting accuracy than cross model.In practical application,Carreau model can be used to fit zero shear viscosity,which plays a good guiding role in the study of high temperature performance of modified asphalt.
作者
贺玉莹
贾晓鹏
王菲菲
张艳君
赵立东
HE Yu-ying;JIA Xiao-peng;WANG Fei-fei;ZHANG Yan-jun;ZHAO Li-dong(School of Civil Engineering,Hebei University of Engineering,Handan 056038,China;China Highway(Beijing)Engineeing Materials Technology Co.,Ltd.,Beijing 100176,China;Hebei Port Group Port Machinery Co.,Ltd.,Qinhuangdao 066099,China)
出处
《科学技术与工程》
北大核心
2022年第20期8840-8847,共8页
Science Technology and Engineering
基金
广州交投集团科技项目(BLX-SGYY-2021-001)。
