温拌沥青胶结料与混合料粘结性能研究  

Investigating the Bonding Performance of Warm Mix Asphalt Binder and Mixture

作　　者：陈学锋 云广琨 吴特伟 闫力辉 颜川奇 CHEN Xuefeng;YUN Guangkun;WU Tewei;YAN Lihui;YAN Chuanqi(China Communications Construction Group Southwest Construction Co.,Ltd.,Chengdu 610081,China;School of Civil Engineering,Southwest Jiaotong University,Chengdu 610031,China)

机构地区：[1]中交建筑集团西南建设有限公司,成都610081 [2]西南交通大学土木工程学院,成都610031

出　　处：《材料导报》2024年第20期138-144,共7页Materials Reports

基　　金：国家重点研发计划(2022YFB2602603);香江学者项目(XJ2022040);国家自然科学基金(52008353);四川省青年科技创新研究团队(2021JDTD0023,2022JDTD0015)。

摘　　要：本工作旨在探究Sasobit改性沥青、Evotherm改性沥青、餐厨废油(Waste cooking oil,WCO)改性沥青三种温拌沥青(WMA)胶结料及其混合料的粘结性能。采用傅里叶变换红外光谱(FTIR)和场发射透射电镜(TEM)观察温拌剂的化学成分和沥青胶结料的相态结构;采用动态剪切流变仪(DSR)拉伸试验表征沥青的内聚性能;采用胶结料粘结强度(BBS)试验表征沥青-集料的粘附性能;采用浸水汉堡车辙试验(HWT)表征沥青混合料的抗变形能力和抗剥落性能,基于分离变形的HWT曲线表征抗水损伤性能;采用肯塔堡飞散试验表征沥青混合料的抗松散性能。结果表明,Sasobit会提高沥青内聚性能而不利于沥青-集料的粘附性能,Evotherm和WCO则与之相反。混合料试验中,Sasobit大幅提高沥青混合料的抗变形能力和抗剥落性能,轻微减弱抗水损伤能力,而Evotherm和WCO均产生不利影响;Sasobit大幅减弱沥青混合料的抗松散性能,Evotherm和WCO微弱提升抗松散性能。对于HWT试验,内聚性能的影响更为显著,对于飞散损失试验,粘附性能的影响更为显著。沥青混合料的粘结性能不能完全由沥青胶结料的粘结性能代表,需要综合考虑内聚性能和粘附性能的作用。The aim of this study is to investigate the bonding performance of three types of warm mix asphalt(WMA)binders and mixtures,including Sasobit-modified asphalt,Evotherm-modified asphalt,and waste cooking oil(WCO)-modified asphalt.Fourier transform infrared spectroscopy(FTIR)and transmission electron microscopy(TEM)were used to observe the chemical composition of the warm mix additives and the phase structure of asphalt binders.Dynamic shear rheometer(DSR)was used to characterize the cohesion properties of asphalt,binder bond strength(BBS)test was used to characterize the adhesion properties of asphalt-aggregate,and Hamburg wheel tracking(HWT)test was used to characterize the resistance to deformation and stripping of asphalt mixtures.The HWT curve based on the separation deformation was used to characterize the resistance to water damage.The Cantabro loss test was used to characterize the resistance to looseness of asphalt mixtures.The results show that Sasobit improves the cohesion properties of asphalt but has a negative impact on the adhesion between asphalt and aggregates,while Evotherm and WCO have the opposite effect.In the mixture test,Sasobit significantly improves the resistance to deformation and stripping,slightly weakens the resistance to water damage,and significantly weakens the resistance to looseness,while Evotherm and WCO both have a negative impact.For the HWT test,the influence of cohesion properties is more significant,while for the Cantabro loss test,the influence of adhesion properties is more significant.The bonding performance of asphalt mixtures cannot be fully represented by the bonding performance of asphalt binders,and the effects of cohesion properties and adhesion properties should be considered comprehensively.

关 键 词：温拌沥青 内聚性能 粘附性能 抗水损伤 抗剥落 抗松散 

分 类 号：U414[交通运输工程—道路与铁道工程]