活化胶粉和废食用油改性再生沥青的性能与相分离特性  

Properties and phase separation characteristics of modified recycled asphalt with activated crumb rubber and waste cooking oil

作　　者：胡春华 孙兆斌 冯会新 习磊 田文 HU Chun-hua;SUN Zhao-bin;Feng Hui-xin;XI Lei;TIAN Wen(School of Civil Architecture and Environment/Innovation Demonstration Base of Ecological Environment Geotechnical and Ecological Restoration Lakes,Hubei University of Technology,Wuhan 430068,China;China Construction Five Bureau Henan Company,Zhengzhou 450009,China)

机构地区：[1]湖北工业大学土木建筑与环境学院/生态环境岩土与河湖生态修复学科引智创新示范基地,武汉430068 [2]中国建筑五局河南公司,郑州450009

出　　处：《合成橡胶工业》2024年第6期458-464,共7页China Synthetic Rubber Industry

基　　金：国家自然科学基金资助项目(51178167);湖北工业大学博士科研启动基金资助项目(XJ 2022008401)。

摘　　要：通过微波活化制备了微波活化胶粉(ACR),以ACR为改性剂、废食用油(WCO)为再生剂、老化沥青(RA)为原料,通过调控ACR和WCO掺量制备了不同的沥青结合料,研究了ACR和WCO掺量对沥青结合料基本技术指标、高低温性能、抗疲劳开裂性能和储存稳定性的影响。此外,也对沥青结合料的形成过程进行了机理分析。结果表明,当WCO掺入质量分数为RA的7%和10%、ACR掺入质量分数为RA的12%~25%时,WCO作为再生剂不仅能够有效恢复RA的性能,还可通过增溶效应促进ACR充分溶胀,从而提升沥青结合料的综合性能。随着ACR掺量的增加,沥青结合料的高温抗永久变形能力和抗疲劳开裂性能逐步提高;随着WCO掺量的增加,沥青结合料的低温抗开裂性能提升更为显著。当ACR和WCO掺入质量分数分别为18%和10%时,沥青结合料的储存稳定性最佳。沥青结合料中ACR相与RA相形成了紧密的“纽扣”状三维网状结构,体现出ACR和WCO之间具有优异的协同改性效应。Microwave-activated crumb rubber(ACR)was prepared by microwave activation,diffe-rent asphalt binders were prepared by regulating the addition amounts of ACR and WCO with ACR as the modifier,WCO as the rejuvenator and aged asphalt(RA)as the raw material,and the effects of the addition amounts of ACR and WCO on the basic technical indexes of the asphalt binders,high-and low-temperature properties,anti-fatigue cracking performance and storage stability were investigated.In addition,the mechanism of formation process of asphalt binders was also analyzed.The results showed that when the addition mass fraction of WCO was 7%and 10%of RA,and the addition mass fraction of ACR was 12%-25%of RA,WCO,as a rejuvenator,could not only effectively restore the performance of RA,but also promote the full swelling of ACR through the solubilization effect,thereby improving the comprehensive performance of asphalt binders.With the increase in ACR addition amount,high-temperature permanent deformation resistance and anti-fatigue cracking performance of asphalt binders improved gradually;with the increase in WCO addition amount,low-temperature cracking resistance of asphalt binders improved significantly.When the addition mass fractions of ACR and WCO were 18%and 10%,respectively,the storage stability of asphalt binder was the best.The ACR phase and RA phase in asphalt binder formed a tight“button”three-dimensional network structure,which reflected the excellent synergistic modification effect between ACR and WCO.

关 键 词：微波活化胶粉 废食用油 老化沥青 沥青结合料 流变性能 储存稳定性 相分离特性 

分 类 号：U414[交通运输工程—道路与铁道工程]