基于抗裂性能的沥青混合料低温弯曲蠕变试验  

Low-temperature flexural creep test on crack resistance of asphalt mixture

作　　者：李晓娟[1] 韩森[1] 贾志清[1] 吕晓霞[1] 陈亚杰[1] 

机构地区：[1]长安大学公路学院,陕西西安710064

出　　处：《广西大学学报（自然科学版）》2011年第1期142-146,159,共6页Journal of Guangxi University（Natural Science Edition）

基　　金：国家西部交通建设科技项目(200731822301-8);交通部科技项目(200335332316)

摘　　要：采用KLM70#、KLM90#、KLM110#和科氏SBS(苯乙烯-丁二烯嵌段共聚物)改性沥青及AC-13、JW-13、Sup-13三种级配的混合料,分别进行低温弯曲蠕变试验来评价沥青混合料的低温抗裂性,评价指标为蠕变速率、应力水平,研究了老化及不同油石比对弯曲蠕变试验结果的影响。结果表明:就抗裂性而言,大标号沥青优于小标号沥青;细型密级配混合料优于粗型密级配混合料;加大油石比可提高抗裂性,但不宜过大。Making use of the modified asphalts of KLM70#,KLM90#,KLM110# and SBS,with the gradations of AC-13,JW-13 and Sup-13,a low-temperature flexural creep test was conducted to evaluate the low-temperature crack resistance of asphalt mixture by creep rate and stress level,and the influence of aging and oil stone ratio on the results of the flexural creep test was studied.The results show that the high grade asphalt is superior to the low grade asphalt,the mixture of fine gradation is superior to the mixture of coarse gradation and properly increasing the oil stone ratio may improve the anti-crack performance.

关 键 词：沥青混合料 温度裂缝 低温弯曲蠕变试验 蠕变速率 应力水平 

分 类 号：U416.2[交通运输工程—道路与铁道工程]