长期老化对沥青表面能及其与集料黏附性的影响  

Effect of Long-Term Aging on Surface Energy of Asphalt and Its Adhesion to Aggregate

作　　者：雷俊安 郑南翔[1] 董善真 LEI Jun'an;ZHENG Nanxiang;DONG Shanzhen(Highway school,Chang'an University,Xi'an 710064,China;Power China Kunming Engineering Co.,Ltd.,Kunming 650051,China)

机构地区：[1]长安大学公路学院,陕西西安710064 [2]中国电建集团昆明勘测设计研究院有限公司,云南昆明650051

出　　处：《建筑材料学报》2021年第2期393-398,共6页Journal of Building Materials

基　　金：国家自然科学基金资助项目(51308061)。

摘　　要：为了研究长期老化对沥青表面能及其与集料黏附性的影响,选取基质沥青(BA)、苯乙烯丁二烯苯乙烯嵌段共聚物(SBS)改性沥青(SBS-MA)、橡胶沥青(RA)、高黏沥青(HVA)4种沥青和石灰岩、玄武岩、辉绿岩3种岩性集料,通过接触角试验和表面能理论计算,分析了长期老化前后不同类型沥青的表面能及其与不同集料的黏附功变化情况.结果表明:长期老化增大了沥青与水的接触角,提高了沥青的疏水性能,老化前后其接触角大小为BA>SBS-MA>RA>HVA;长期老化降低了沥青的表面能及其与集料的黏附性,老化前后其表面能和黏附功大小为HVA>RA>SBS-MA>BA;长期老化后,BA、SBS-MA、RA、HVA的表面能分别降低了1.98%、7.43%、6.47%、3.22%,除BA黏附功变化不大外,SBS-MA、RA、HVA的黏附功平均降低了3.71%、3.13%、2.01%,长期老化对SBS改性沥青的影响最为明显.In order to study the effect of long-term aging on the surface energy of asphalt and its adhesion to aggregate,base asphalt(BA),styrene-butadiene-styrene(SBS)modified asphalt(SBS-MA),rubber asphalt(RA),high viscosity asphalt(HVA),and three kinds of lithologic aggregates,namely limestone,basalt and diabase were chosen.Based on the contact angle test and surface energy calculation,the surface energy of asphalt,the adhesion work with aggregate before and after long-term aging were analyzed.The results show that long-term aging increases the contact angle between asphalt and water,improves the hydrophobicity of asphalt.The contact angle before and after aging is BA>SBS-MA>RA>HVA.Long-term aging reduces the surface energy of asphalt and its adhesion to aggregate,and the surface energy and adhesion work before and after aging are HVA>RA>SBS-MA>BA.After long-term aging,the surface energies of the four asphalts,BA,SBS-MA,RA and HVA,were reduced by 1.98%,7.43%,6.47%,and 3.22%,respectively.Except for the base asphalt,the adhesion work of SBS-MA,RA and HVA decreased by 3.71%,3.13%,2.01%on average.Long-term aging has the most obvious effect on SBS modified asphalt.

关 键 词：长期老化 接触角 表面能 黏附性 

分 类 号：U414[交通运输工程—道路与铁道工程]