基于SARA组分调和沥青流变性能、粘附性自愈合性能研究  

Study on Rheological Properties and Adhesion Self-healing Properties of SARA Doped Asphalt

作　　者：何印章 熊坤 张久鹏[1,2] 李哲 李岩[1,2] HE Yinzhang;XIONG Kun;ZHANG Jiupeng;LI Zhe;LI Yan(School of Highway,Chang’an University,Xi’an 710064,China;The Key Laboratory of Intelligent Construction and Maintenance of CAAC,Xi’an 710064,China)

机构地区：[1]长安大学公路学院,西安710064 [2]民航机场智慧建造与维养重点实验室,西安710064

出　　处：《材料导报》2024年第22期57-64,共8页Materials Reports

基　　金：中央高校基本科研项目(300102211301,310821173501,300102214302)。

摘　　要：现阶段,关于SARA组分对沥青性质和在沥青-集料界面破坏机制及界面粘附性自愈合性能等方面的研究不足,而大批量提取沥青组分较难完成。因此,本研究采用Corbett法对基质沥青进行组分分离并制备了组分调和沥青,借助DSR频率扫描试验分析了SARA组分对流变性能的影响,使用SHRP净吸附试验、拉拔试验研究了SARA组分对沥青粘附性自愈合性能的影响机制,最后借助灰色关联分析和线性相关性分析剖析了组分对其界面性能的影响机制。研究结果表明,沥青质和胶质含量的增加会增大界面的粘附强度,但对界面自愈合性能存在不利影响,其中沥青质影响作用强于胶质。芳香分和饱和分含量的增加会在一定程度上减小界面粘附强度,但其对界面自愈合有促进作用,其富含脂肪族支链小分子,可增强沥青的流动性,促进界面愈合,芳香分的影响高于饱和分。灰色关联和线性相关性分析表明,沥青界面粘附强度和单个组分的相关性低于双组分(轻质组分、重质组分),其界面粘附性自愈合性能和轻质组分、重质组分含量存在较强的线性关系。At present,there is insufficient research on the properties of SARA component on asphalt,the failure mechanism of asphalt-aggregate interface and the self-healing performance of interface adhesion.However,it is very difficult to extract asphalt components in large quantities.Therefore,in this work,the Corbett method was used to separate the components of matrix asphalt to prepare component-doped asphalt.The influence of SARA components on rheological properties was analyzed by the DSR frequency scanning test.The influence mechanism of SARA components on the self-healing performance of asphalt adhesion was studied by the SHRP net adsorption test and pulling test.Finally,the inf-luence mechanism of Sara components on its interface properties was analyzed using grey correlation analysis and linear correlation analysis.The results show that the increase of asphaltene and resin content will increase the adhesion strength of the interface,but it harms the self-healing performance of the interface,in which asphaltene has a stronger effect than resin.The increase in the content of aromatic and saturate components reduce the interfacial adhesion strength to some extent,but it promote interfacial self-healing.It is rich in aliphatic branched molecules,which can increase the fluidity of asphalt and promote interfacial healing.The influence of aromatic components is higher than that of saturate components.The grey correlation and linear correlation analysis show that the correlation between the interfacial adhesion strength of asphalt and a single component is lower than that of two components(light component and heavy component),and the self-healing performance of interfacial adhesion is linear with light component and heavy component to some extent.

关 键 词：路面工程 沥青 粘附性能 SARA组分 流变性能 

分 类 号：U416.2[交通运输工程—道路与铁道工程]