AASHTO T 324-19 PDF Download

AASHTO T 324-19 is a standard method that outlines the procedure for performing the Hamburg Wheel-Track Testing of Compacted Hot Mix Asphalt(HMA). This test is conducted to evaluate the rutting and moisture-susceptibility of HMA pavement samples.

The method involves testing submerged and compacted HMA samples in a reciprocating rolling-wheel device known as the Hamburg Wheel-Tracking Device. The test provides important information about the rate of permanent deformation caused by a moving, concentrated load. It can be conducted using laboratory compactor-designed slab specimens or field cores of different diameters, or saw-cut slab specimens.

The primary purpose of this test is to determine the susceptibility of HMA to premature failure due to various factors such as weak aggregate structure, insufficient binder stiffness, or moisture damage. This method measures the rut depth and number of passes to failure, allowing for the assessment of potential issues related to moisture damage effects.