基于灰色关联分析的密级配沥青混合料分形维数研究

Study on Fractal Dimension of Dense-Gradation Asphalt Mixture Based on Grey Relational Analysis

针对AC-16沥青混合料,应用灰色关联分析方法,研究粒组集料含量与沥青混合料分形维数之间的关联程度,根据关联度的大小,将粒组分为四类,每一粒组类别与分形维数的关联程度相同.以粗糙集理论为基础,对粒组进行约简,选出了影响AC-16沥青混合料分形维数的关键粒组,通过控制与关键粒组对应的筛孔通过率,即可改变分形维数,进而调整沥青混合料的路用性能.

For AC-1 6 asphalt mixture,the grey relational degree between the aggregate fraction content and the fractal dimension of asphalt mixture is obtained by the method of grey relational analysis.According to the relational degree,aggregate fractions are divided into four categories, and each aggregate category is associated with the fractal dimension in the same relational degree. Aggregate fractions are reducted based on rough set theory,and the key fractions are chosen, which have crucial impact on fractal dimension of AC-1 6 asphalt mixture.By controlling the pass-ing rate of the key sieve pore corresponding with the key fractions,the fractal dimension is changed and then the pavement performance of asphalt mixture can be changed in some degree.