AASHTO TP 140-20

This test method includes procedures for preparing compacted asphalt mixture specimens, exposing the specimens to prolonged exposure to moisture and hydrostatic pore pressure inside an enclosed chamber and testing the effect of water on the tensile strength and swell of the specimens.

The values stated in either SI units or U.S. Customary units are to be regarded separately as standard. The values stated in each system may not be exact equivalents; therefore, each system shall be used independently of the other. Combining values from the two systems may result in non-conformance with the standard.