The wheel wear test was carried out with rutted plate specimens for AC,SMA and PAC as-phalt mixtures.The surface textures of three kinds of mixtures were extracted at different wear sta-ges,and the friction coefficient of the worn area was measured.The surface texture was extracted and analyzed by digital image method,and the quantitative evaluation indexes such as equivalent point density,equivalent area density and equivalent included angle were established.The results show that the first 1000 times of wheel wear have the most significant influence on the equivalent point density and equivalent area density,which is consistent with the change law of friction coefficient.
维普
万方数据