采用动态粘弹指数作为沥青性能指标的开发及验证

发布时间：2018-04-06 06:21

  本文选题：沥青　切入点：指标　出处：《公路工程》2017年05期

【摘要】：为准确评估沥青的性质,提出基于流变力学的新指标-动态粘弹指数(Dvi)。为了验证这个新指标,采用Dvi对6种沥青进行了评估,同时采用沥青路面分析仪和间接拉伸试验对6种沥青混合料的高温和低温特性进行了研究。结果表明,Dvi和温度表现出良好的相关性,且可以采用二次函数拟合。此外,曲线的斜率在50℃左右发生改变,且曲线可以分别采用线性模型进行拟合。建议采用Dvi作为沥青的高温和低温性能指标,因为Dvi和沥青混合料的性能之间具有良好的相关性。
[Abstract]:In order to evaluate the properties of asphalt accurately, a new index based on rheological mechanics, dynamic viscoelastic index, was proposed.In order to verify this new index, six kinds of asphalt were evaluated by Dvi, and the characteristics of high temperature and low temperature of six kinds of asphalt mixture were studied by asphalt pavement analyzer and indirect tensile test.The results show that DVI has a good correlation with temperature and can be fitted by quadratic function.In addition, the slope of the curve changes at about 50 鈩，

本文编号：1718357