学术论文

      沥青混合料动态压缩弹性模量试验方法与影响因素

      Test method and influencing factors for the dynamic compression elastic modulus of asphalt mixtures

      摘要:
      为了研究应变测试方法、加载频率、试验温度和应力幅值对沥青混合料动态压缩弹性模量的影响,用MTS路面材料动态试验系统对常用的两种沥青混合料AC-16和AC-20的动态压缩弹性模量进行了系统的测试,通过分析建立了各因素与动态压缩弹性模量之间的关系,以及动态与静态弹性模量的关系.结果表明,采用侧面法测定的结果与现行规范中的推荐值更接近,也能够消除由顶面法引起的试件端面的接触误差,建议在静态和动态模量试验中首选侧面法,在动态测试中要选择合适的加载频率,使得试验结果的偏差系数控制在20%以下.
      Abstract:
      In order to study the effects of strain test methods,loading frequency,testing temperature and stress amplitude on the dynamic compression elastic moduli of asphalt mixtures,the dynamic compression elastic moduli of two kinds of commonly asphalt mixtures,AC-16 and AC-20,were studied by using an MTS dynamic pavement material test system.The relation between the above factors and the dynamic compression elastic modulus as well as the relation between the static and dynamic compression elastic modulus was established.According to the analysis of test results,the data tested by the side method much approach to the recommended values in the specification and the side method can also eliminate the contact error of the specimen caused by the top surface method.It is recommended that the side method is firstly chosen to use in the static and dynamic modulus test.While an appropriate load frequency is selected in the dynamic test,the deviation coefficient of test results should be controlled below 20%.
      作者: 姚爱玲 [1] 郑鹏飞 [2]
      作者单位: 长安大学公路学院特殊地区教育部重点实验室,西安,710064 内蒙古自治区呼伦贝尔市交通局,呼伦贝尔,021000
      刊 名: 北京科技大学学报 ISTICEIPKU
      年,卷(期): 2011, 33(10)
      分类号: U414
      机标分类号: TB3 TQ3
      在线出版日期: 2012年4月21日