AASHTO TP 140-20 PDF Download

The AASHTO TP 140-20 standard is a provisional method of test that aims to assess the moisture sensitivity of compacted asphalt mixture specimens. The method involves subjecting the specimens to hydrostatic pore pressure, simulating prolonged exposure to moisture. By doing so, the standard aims to determine the cohesion and adhesion strength of the specimens.

The first step of the test involves preparing the specimens in a controlled laboratory environment. These specimens are then exposed to moisture and hydrostatic pore pressure inside an enclosed chamber. The exposure to water allows for the evaluation of the specimens' resistance to moisture-induced damage.

The standard then goes on to outline the testing procedures and parameters used to assess the moisture sensitivity of the specimens. These procedures aim to measure the specimens' tensile strength and swell, providing valuable information on their resistance to moisture-induced failures.