摘要
针对两种老化程度不同的废旧沥青混合料,分别进行不同RAP质量分数的再生沥青混合料配合比设计.并进行再生沥青混合料劈裂强度和间接拉伸疲劳试验,并通过加速老化前后疲劳特性的变化,对比分析不同RAP材料对再生沥青混合料疲劳特性的影响.试验结果表明,RAP老化程度严重的再生沥青混合料的劈裂强度大于RAP老化程度较轻的再生沥青混合料劈裂强度.RAP材料老化越严重,其再生沥青混合料的疲劳寿命越短,对应力的敏感性也就越低.
According to two kinds of waste asphalt mixtures,the mix design of reclaimed asphalt mixture is determined,and the splitting strength test and indirect tensile fatigue test of the reclaimed asphalt mixture are carried out.Through the fatigue characteristics before and after accelerated aging,the reclaimed asphalt mixture fatigue characteristics with different RAP material are analyzed.Test results show that the splitting strength of the reclaimed asphalt mixture with serious aging degree of RAP is greater than the one of reclaimed asphalt mixture with less aging degree of RAP.If the RAP aging condition is more serious,the fatigue life is shorter and the stress sensitivity of the reclaimed asphalt mixture is lower.
出处
《大连交通大学学报》
CAS
2014年第2期71-75,共5页
Journal of Dalian Jiaotong University
基金
国家自然科学基金资助项目(51278513)
重庆市科技攻关基金资助项目(cstc2012ggA50001)