AASHTO PP 104-21涵盖了使用三轮抛光装置（TWPD）进行动态摩擦试验的沥青混合料样品制备和抛光。本标准适用于压实沥青混合料板试样。组装一组旋转圆柱体时，需要其他试样制备程序，以便使用TWPD进行抛光。

This method covers the sample preparation and polishing of asphalt mixtures for dynamic friction testing using a three-wheel polishing device (TWPD). This standard is to be used with compacted asphalt mixture slab specimens. Other specimen preparation procedures would be needed for assembling a group of gyratory cylinders to be polished using a TWPD.