植物基生物再生沥青的路用性能及再生机理研究  

Study on road performance and mechanism of vegetable-based bio-recycled asphalt

作　　者：余乐 何兆益[1] 李晓民 魏定邦 赵静卓 由诗园 YU Le;HE Zhao-yi;LI Xiao-min;WEI Ding-bang;ZHAO Jing-zhuo;YOU Shi-yuan(School of Civil Engineering,Chongqing Jiaotong University,Chongqing 400074,China;Chongqing City Construction Investment Group Co.,Ltd.,Chongqing 400023,China;Gansu Province Highway Traffic Construction Group Co.,Ltd.,Lanzhou 730030,China;Gansu Province Transport Planning Survey and Design Institute Co.,Ltd.,Lanzhou 730030,China)

机构地区：[1]重庆交通大学土木工程学院,重庆400074 [2]重庆市城市建设投资(集团)有限公司,重庆400023 [3]甘肃省公路交通建设集团有限公司,甘肃兰州730030 [4]甘肃省交通规划勘察设计院股份有限公司,甘肃兰州730030

出　　处：《应用化工》2024年第4期791-796,共6页Applied Chemical Industry

基　　金：国家自然科学基金资助项目(51978116);甘肃省科技重大专项计划项目(22ZD6GA010);重庆交通大学研究生科研创新项目(2022B003)。

摘　　要：采用热重分析仪、差示扫描量热仪和红外光谱仪分析了植物基生物再生剂(WL-2H)的热稳定性和再生机理,基于动态剪切流变实验、测力延度实验和弯曲梁流变实验,探究了原样沥青、老化沥青和再生沥青的流变性能与疲劳特性。结果表明,随着WL-2H掺量的增加,植物基生物再生沥青的车辙因子、蠕变恢复率、低温劲度模量和疲劳因子逐渐减小,不可恢复柔量、延度和劲度模量变化率逐渐增大,N_(f50)先增大后减小;当WL-2H掺量为7%左右时,植物基生物再生沥青的的路用性能可基本恢复至原样沥青水平;WL-2H具有良好的热稳定性,主要通过物理作用对老化沥青性能进行再生。Thermal stability and regeneration mechanism of vegetable-based bio-rejuvenator(WL-2H) were analyzed by thermogravimetric analysis(TG),differential scanning calorimetry(DSC) and infrared spectrometer(FTIR).Based on dynamic shear rheology(DSR) test,force ductility test(FDT) and bending beam rheology(BBR) test,rheological properties and fatigue characteristics of original asphalt,aged asphalt and regenerated asphalt were investigated.The results show that with the increase of WL-2H content,rutting factor,creep recovery rate,low temperature stiffness modulus and fatigue factor of vegetable-based bio-recycled asphalt decrease gradually,unrecoverable flexibility,ductility and stiffness modulus change rate increase gradually,and N_(f50) increases first and then decreases.When the content of WL-2H is about 7%,road performance of vegetable-based bio-recycled asphalt can be basically restored to original asphalt level;WL-2H has good thermal stability and regenerates the performance of aged asphalt through physical action.

关 键 词：植物油 再生沥青 流变性能 疲劳性能 再生机理 

分 类 号：TQ072[化学工程] U414[交通运输工程—道路与铁道工程]