开级配沥青混合料的细观结构特征与影响因素研究

Study on the fine structure characteristics and influencing factors of Open Graded Asphalt Mixtures

通过数字图像处理技术,深入探索OGFC(Open-Graded Friction Course)混合料细观结构中空隙的分布、大小和复杂程度,并且分析出空隙数量、面积、空隙分形维数等参数的变化趋势,从而更好地了解这些参数与混合料性能之间的关联。结果表明:OGFC混合料试件断面图像的空隙数量、空隙面积和空隙分形维数等参数同混合料性能密切相关,且相互之间具备良好的线性回归关系。

The distribution,size and complexity of voids in the fine structure of OGFC(Open-Graded Friction Course)mixes were explored by digital image processing techniques,and the trends of parameters such as the number,area and fractal dimension of voids were analyzed to better understand the correlation between these parameters and the mix performance.The results show that the number of voids,area of voids and fractal dimension of voids in the cross-sectional images of OGFC mix specimens are closely related to the performance of the mix,and there is a good linear regression relationship between them.