摘要
利用轮碾法成型车辙板,并切割成小梁试件,研究采用垂直振动法和马歇尔法设计的AC-20混合料的弯拉疲劳特性,并应用威布尔分布建立疲劳方程.结果表明：与马歇尔法设计的AC-20混合料相比,垂直振动法设计的AC-20混合料油石比降低了6.91%,密度提高了1.6%,动稳定度、抗剪强度和抗拉强度分别提高了32.2%,38.7%和43.7%;垂直振动法AC-20混合料在高应力作用下抗疲劳性能及对应力变化敏感性均优于马歇尔法AC-20混合料,体现在垂直振动法AC-20混合料与马歇尔法AC-20混合料的疲劳方程斜率之比为0.883-0.965,截距之比为1.131-1.194.
The rutting plate was formed by wheel grinding method and cut into trabecular specimens. The flexural-tensile fatigue characteristics of AC-20 asphalt mixture designed respectively by Marshall mixture design method and vertical vibration test method were investigated. The fatigue equations were established by Weibull distribution,and the tensile strength structure coefficient was determined. The tensile strength structure coefficient was compared with that in specification. The results show that compared with the AC-20 asphalt mixture designed by Marshall mixture design method,the asphalt aggregate ratio of AC-20 asphalt mixture designed by vertical vibration test method is reduced by 6. 91% with improved density by1. 6%,and dynamic stability,sheer strength and tensile strength are improved respectively by 32. 2%,38. 7% and 43. 7%. The radio of slope for fatigue equations by vertical vibration testing method and Marshall mixture design method is from 0. 883 to 0. 965,and that of intercept is from 1. 131 to 1. 194.The performance of AC-20 asphalt mixture designed by vertical vibration testing method is better than that by Marshall mixture design method.
出处
《江苏大学学报（自然科学版）》
EI
CAS
CSCD
北大核心
2016年第4期473-478,共6页
Journal of Jiangsu University：Natural Science Edition
基金
河南省交通运输科技项目(2014K49-1)
关键词
沥青混合料
疲劳性能
垂直振动法
马歇尔法
小梁弯曲疲劳试验
asphalt mixture
fatigue performance
vertical vibration test method
Marshall mixture design method
trabecular bending fatigue test
