AASHTO TP 132-19 PDF Download

AASHTO TP 132-19 is a provisional standard method of test that outlines the procedure for determining the dynamic modulus of asphalt mixtures using the Asphalt Mixture Performance Tester (AMPT). The dynamic modulus is a key parameter used to characterize the stiffness and deformation properties of asphalt mixtures under different loading conditions.

This standard is applicable to dense-graded mixtures with a nominal maximum aggregate size of up to 19.0 mm (0.75 in.). The test method involves subjecting small asphalt specimens to repeated sinusoidal loading at different frequencies and temperatures, and measuring the resulting strain response.

The AMPT is specifically designed to simulate the complex loading conditions experienced by asphalt pavements in the field. It applies both vertical and horizontal dynamic loads to the specimens, simulating the effects of vehicle loading and temperature variations on the pavement structure. The dynamic modulus is then calculated by analyzing the stress and strain data obtained from the testing.

By determining the dynamic modulus of asphalt mixtures, this standard provides valuable information for understanding the performance characteristics of the material in terms of stiffness, rutting resistance, and fatigue endurance. This information is essential for designing and evaluating asphalt pavements, and can help optimize material selection and pavement designs for different climate and traffic conditions.