AASHTO T 344-12 (2020) PDF Download

AASHTO T 344-12 (2020) is a standard method for evaluating the internal angle of gyration of a Superpave Gyratory Compactor (SGC) using simulated loading. The purpose of this standard is to determine the angle at which the specimens in the SGC begin to move radially outward due to gyrations. This is an important parameter in assessing the densification characteristics of asphalt mixtures.

This standard follows a similar procedure to ASTM D 7115-05, with the exception of the number of individual measurements required. It specifies the equipment, such as the SGC and the mold assembly, as well as the preparation of the test specimens. The test involves subjecting the specimens to specified gyrations at a controlled temperature and measuring the internal angle of gyration at various points. The test results can then be used to assess the compactability and performance of the asphalt mixtures.

By providing a standardized method for evaluating the internal angle of gyration, AASHTO T 344-12 (2020) ensures consistent and reliable testing of Superpave Gyratory Compactors. This helps in determining the performance characteristics of asphalt mixtures and improving their design and construction process.