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水泥稳定砖与混凝土再生集料混合料的疲劳性能
Fatigue Performance of Cement Stabilized Recycled Brick and Concrete Aggregate(RBCA) Mixtures
投稿时间:2018-09-12  修订日期:2018-11-12
DOI:103969/j.issn.1007 9629201906013
中文关键词:  道路工程  砖与混凝土再生集料  疲劳特性  弯拉强度
英文关键词:road engineering  recycled brick and concrete aggregate(RBCA)  fatigue property  flexural tensile strength
基金项目:湖南省科技支撑计划项目(2015SK2063);长沙市科技计划项目(kq1703046,kc1804053)
              
作者单位
肖杰
XIAO Jie
长沙理工大学交通运输工程学院,湖南长沙410114
School of Traffic & Transportation Engineering, Changsha University of Science & Technology, Changsha 410114, China
陈强
CHEN Qiang
长沙理工大学交通运输工程学院,湖南长沙410114
School of Traffic & Transportation Engineering, Changsha University of Science & Technology, Changsha 410114, China
吴超凡
WU Chaofan
湖南省建筑固废物资源化利用工程技术研究中心,湖南长沙410021
Hunan Construction and Demolition Materials Reclamation Engineering Technology Research Center, Changsha 410021, China
孙永超
SUN Yongchao
长沙理工大学交通运输工程学院,湖南长沙410114
School of Traffic & Transportation Engineering, Changsha University of Science & Technology, Changsha 410114, China
龙晨杰
LONG Chenjie
长沙理工大学交通运输工程学院,湖南长沙410114
School of Traffic & Transportation Engineering, Changsha University of Science & Technology, Changsha 410114, China
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中文摘要:
      研究了水泥稳定砖与混凝土再生集料(RBCA)混合料的无侧限抗压强度、劈裂强度与抗压回弹模量等基本物理力学性能,并开展了水泥稳定RBCA混合料的四点弯曲疲劳试验;基于Weibull分布确定了混合料的疲劳寿命预估模型,分析了RBCA掺量对混合料疲劳性能的影响.结果表明:随着RBCA掺量的增加,水泥稳定RBCA混合料的无侧限抗压强度、劈裂强度与抗压回弹模量均先增大后减小,弯拉强度也具有类似规律;相同级配与水泥剂量下,混合料的疲劳寿命随着RBCA掺量的增加而增大,且RBCA掺量较小时其混合料疲劳寿命增幅较大,后续增幅变小;加入RBCA可提高水泥稳定碎石混合料的抗疲劳性能.
英文摘要:
      The basic physical and mechanical properties such as unconfined compressive strength, splitting strength and compressive resilience modulus of cement stabilized recycled brick and concrete aggregate(RBCA) mixtures were studied. Four point flexural beam fatigue test on RBCA mixtures with different RBCA contents was conducted. A prediction model of fatigue life of RBCA mixtures based on Weibull distribution was determined and the influence on fatigue performance of mixtures with different RBCA contents was analyzed. The results show that all the unconfined compressive strength, splitting strength and compressive resilience modulus of cement stabilized RBCA mixtures increase at first and then decrease with increasing RBCA content, and the flexural tensile strength also has a similar rule. The fatigue life of the mixture for the same gradation and cement content increases with increasing RBCA content. The fatigue life of RBCA mixtures is increased greatly when the RBCA content is small. The addition of RBCA can improve the fatigue properties of cement stabilized macadam mixture.
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