基于表面能理论的石灰改性沥青黏附性研究  

Adhesion of Lime Modified Asphalt Based on Surface Energy Theory

作　　者：董仕豪 韩森[1] 尹媛媛 吴松 张启鑫 DONG Shihao;HAN Sen;YIN Yuanyuan;WU Song;ZHANG Qixin(College of Highway,Chang'an University,Xi'an 710064,Shaanxi,China)

机构地区：[1]长安大学公路学院,陕西西安710064

出　　处：《重庆交通大学学报（自然科学版）》2021年第3期89-97,共9页Journal of Chongqing Jiaotong University(Natural Science)

基　　金：国家自然科学基金项目(51578076);中央高校基本科研业务费专项资金(300102219207)。

摘　　要：为从机理上研究石灰[Ca(OH)2]对沥青黏附性的改善作用,基于表面能理论,分析了石灰改性沥青与花岗岩之间黏附功变化,并研究了石灰掺量和细度对沥青黏附性的影响。为了进一步验证基于表面能理论的分析结果的正确性,进行拉拔试验,并与黏附功进行相关性分析。结果表明:石灰的加入能提高沥青极性,增加沥青表面能,进而提高沥青与集料的黏附功,改善黏附性;沥青的黏附性随石灰细度的提高而增大;当石灰掺量约为沥青质量的10%时,沥青与花岗岩具有最好的黏附性;拉拔试验结果与表面能理论试验结果的相关系数为0.900,具有较高的相关性,说明利用表面能理论评价石灰改性沥青效果是可行的。In order to study the effect of lime[Ca(OH)2]on the adhesion of asphalt,based on the surface energy theory,the change of adhesion work between the lime modified asphalt and granite was analyzed,and the influence of lime content and fineness on the adhesion of asphalt was studied.In order to further verify the correctness of the analysis results based on the surface energy theory,the pull-out test was carried out and the correlation analysis with the adhesion work was carried out.The results show that the addition of lime can improve the polarity of asphalt,increase the surface energy of asphalt,and then improve the adhesion by increasing the adhesion work between asphalt and aggregate.The adhesion of asphalt increases with the increase of the fineness of lime.When the content of lime is about 10%by the weight of asphalt,asphalt and granite have the best adhesion.The correlation coefficient between the results of pull-out test and the results of surface energy theory test is 0.900,which has a high correlation and shows that it is feasible to use surface energy theory to evaluate the effect of lime modified asphalt.

关 键 词：道路工程 沥青 黏附性 石灰 表面能 细度 

分 类 号：U414[交通运输工程—道路与铁道工程]