基于正交试验的桐油复合沥青再生剂组成设计研究  

Study on composition design of tung oil composite asphalt recycling agent based on orthogonal test

作　　者：叶群山[1] 秦梦楠 张思敏 YE Qunshan;QIN Mengnan;ZHANG Simin(School of Traffic and Transportation Engineering,Changsha University of Science&Technology,Changsha 410114,China)

机构地区：[1]长沙理工大学交通运输工程学院,湖南长沙410114

出　　处：《长沙理工大学学报（自然科学版）》2022年第4期143-151,共9页Journal of Changsha University of Science and Technology:Natural Science

基　　金：湖南省教育厅科学研究重点项目(20A012);长沙市科技计划项目(kq2014107);交通运输部道路结构和材料重点实验室计划项目(kfj140301)。

摘　　要：【目的】深入研究桐油复合沥青再生剂对老化沥青的综合再生效果。【方法】以桐油、增塑剂、增黏树脂和有机蒙脱土(OMMT)为再生剂的主要原材料,通过正交试验方法,以再生沥青的软化点、25℃针入度、15℃延度和135℃黏度为评价指标,分析确定再生剂各原材料的最佳配比。通过动态剪切流变仪(DSR)试验、弯曲梁流变仪(BBR)试验对桐油复合沥青再生剂恢复老化沥青性能的可行性进行有效性验证。【结果】桐油复合再生剂中桐油、增塑剂、增黏树脂和OMMT的最佳质量配比为25∶5∶2∶3;桐油复合沥青再生剂可以有效恢复老化沥青的性能至基质沥青的水平,且其高、低温流变性能均优于基质沥青的。【结论】研究成果可为后续开展桐油复合再生剂恢复老化沥青的抗老化性和微观结构等方面的研究提供一定的基础。[Purposes]This work aims to study the comprehensive regeneration effect of multiple materials compound preparation of asphalt recycling agent on aged asphalt in depth.[Methods]Tung oil,plasticizer,tackifying resin,and organic montmorillonite(OMMT)were used as the primary materials for recycling asphalt.The softening point,25℃penetration,15℃ductility and 135℃viscosity obtained from the regenerated asphalt were used as judgment indicators,and the recycling agent was optimized by orthogonal test design to analyze and determine the optimum ratio of each raw material.Dynamic shear rheometer(DSR)and bending beam rheometer(BBR)were used to effectively verify the feasibility of tung oil composite asphalt recycling agent to restore the performance of aged asphalt.[Findings]The optimum mass for tung oil composite regenerant components was 25∶5∶2∶3;the tung oil composite asphalt recycling agent can effectively restore the performance of aged asphalt,and the high-and low-temperature rheology was better than that of the matrix asphalt.[Conclusions]The research results can provide a certain basis for the follow-up research on the recovery of aging resistance and microstructure of aged asphalt with tung oil composite regenerant.

关 键 词：桐油复合沥青再生剂 正交试验 老化沥青 再生沥青 流变性 

分 类 号：U414[交通运输工程—道路与铁道工程]