In order to analyze and utilize aggregate fractal characteristics of asphalt mixtures with skeleton dense structure,the fractal formula of mass distribution was deduced based on the fractal geometry theory.Taking SMA-16 mixture as an example,the minimal particle size for the fractal dimension(D) calculation was discussed and the relationship between D and volume parameter was researched based on testing volume parameter of SMA-16 mixture.The results show that the minimal calculation particle size is 0.6 mm;...