AASHTO PP 104-21 PDF Download

AASHTO PP 104-21 is a standard practice that outlines the procedures for sample preparation and polishing of asphalt mixture specimens for dynamic friction testing. The standard specifically focuses on the use of a three-wheel polishing device (TWPD) for this purpose.

The standard is applicable to compacted asphalt mixture slab specimens, which are commonly used for dynamic friction testing. However, it should be noted that if the specimens are in the form of gyratory cylinders, additional specimen preparation procedures would be required before they can be polished using a TWPD.

The purpose of this standard is to ensure consistent and accurate testing of the dynamic friction properties of asphalt mixtures. By providing guidelines for sample preparation and polishing, the standard helps to minimize variations that may arise from improper preparation techniques.