摘要
为评价环境因素对沥青-集料黏附特性的影响,选用70号基质沥青、SBS改性沥青及高黏沥青共3种沥青与玄武岩、石灰岩2种集料为原材料,通过光电比色法定量检测水热耦合作用对界面黏附性的影响,并通过水煮法和电镜扫描加以验证。研究结果表明:随着水热作用时间的增加,沥青与集料的黏附性逐渐降低;SBS改性沥青和高黏沥青与2种集料均表现出良好的抵抗水热作用的性能,SBS改性沥青只适用于短期水热作用,而高黏沥青具有更好的长期抗水热作用性能;水热作用下,沥青在集料表面的脱落并非全部是层状脱落,而是从集料某些表面特性较差的区域开始逐渐收缩变薄,直到完全将集料表面裸露出来;光电比色法可以定量、可靠地评价沥青与集料之间的黏附性能。
In order to evaluate the effect of environmental factors on the adhesion between asphalt and aggregate,a quantitative determination on the influence of hydro-thermal coupling on the interface adhesion asphalt and aggregate with photoelectric colorimetry is needed.Three types of asphalt and two types of aggregates were used,which were matrix asphalt,SBS modified asphalt,high-viscosity asphalt and basalt,limestone.Water-boiling method and SEM were conducted to verify.It showed that the adhesion would decrease with hydro-thermal effect;SBS modified asphalt and high-viscosity asphalt showed good resistance to hydro-thermal effect with both aggregates.SBS modified asphalt is only applicable to short-term hydro-thermal coupling,and the long-term performance of high viscosity asphalt was better;Under the influence of hydro-thermal coupling,the shedding of asphalt on the surface of aggregate was not all stratiform,but shrink and attenuation from some areas of aggregate where the surface properties were poor,until the aggregate were bared absolutely;Photoelectric colorimetric method was quantitative and reliable for evaluating the adhesion between asphalt and aggregate.
作者
崔宇超
马翔
孙孝语
CUI Yuchao;MA Xiang;SUN Xiaoyu(College of Civil Engineering,Nanjing Forestry University,Nanjing 210037,China)
出处
《铁道科学与工程学报》
CAS
CSCD
北大核心
2018年第3期614-620,共7页
Journal of Railway Science and Engineering
基金
国家自然科学基金青年基金资助项目(51408313)
住房城乡建设部科学技术资助项目(2015-K4-017)
南京林业大学高层次人才科研启动基金资助项目(G2014014)
