冻融循环下沥青-集料的黏附性试验与评价方法  

Experiment and evaluation methods on adhesion between asphalt and aggregate under freeze-thaw cycles

作　　者：李萍[1] 何腾 念腾飞 毛昱[1] 陈柯柯 LI Ping;HE Teng;NIAN Tengfei;MAO Yu;CHEN Keke(School of Civil Engineering,Lanzhou University of Technology,Lanzhou,Gansu 730050,China)

机构地区：[1]兰州理工大学土木工程学院

出　　处：《江苏大学学报（自然科学版）》2020年第1期103-110,共8页Journal of Jiangsu University：Natural Science Edition

基　　金：国家自然科学基金资助项目(51868047,51668041);甘肃省科技支撑计划项目(1504GKCA031)

摘　　要：为探究沥青与集料(辉绿岩)之间黏附性的各评价方法之间的关系,采用水煮法、水浸法、接触角法和光电比色法等4种评价方法,在多次冻融循环下,对不同沥青与辉绿岩之间的黏附性进行评价,分析了6种沥青与辉绿岩的黏附性及沥青-集料的剥落度、黏附功和黏附性等级;对不同评价方法的评价指标进行相关性分析,以表征不同评价方法之间的关联度.结果表明:在相同冻融循环次数下,对于辉绿岩而言,冻融循环后不同沥青与辉绿岩的黏附性均较冻融之前下降80%以上,剥落度均增大90%以上;通过对各评价指标间的相关性分析,发现剥落度与水浸等级、黏附功之间的相关性较其他评价指标更好.To explore the relationship among asphalt and aggregate adhesion evaluation methods,four kinds of adhesion evaluation methods of boiling,water immersion,contact angle and photoelectric colorimetry were used to evaluate the adhesion of different asphalts to diabase under multiple freeze-thaw cycles.The adhesion of the six types of asphalt was analyzed,and the degrees of strip,adhesion and adhesion between asphalt and aggregate were also discussed under multiple freeze-thaw cycles.The correlation analysis was carried out on the evaluation indicators of different methods to characterize the correlation among different evaluation methods.The results show that for diabase,after freeze-thaw cycles,the adhesion of different asphalts to diabase is decreased by more than 80%before freezing and thawing,and the degree of strip is increased by over 90%.According to the correlation analysis among evaluation indicators,the correlation of strip degree and water immersion level and the correlation of strip degree and adhesion work are better than those of other evaluation indicators.

关 键 词：沥青 集料 黏附性 水损害 冻融循环 剥落度 黏附功 

分 类 号：U414[交通运输工程—道路与铁道工程]