AASHTO TP 134-19 PDF Download

AASHTO TP 134-19 (2021) is a standard that outlines the method of conducting stress sweep rutting (SSR) tests using the Asphalt Mixture Performance Tester (AMPT). The purpose of this standard is to evaluate the resistance of asphalt mixtures to rutting, which is a common form of distress in asphalt pavements. The test method utilizes the shift model to characterize the rutting performance of the asphalt mixtures.

This standard applies specifically to laboratory-prepared specimens of asphalt mixtures with a maximum aggregate size of 37.5 mm (1.5 in.) or smaller. The specimens are subjected to stress sweep tests using the AMPT, which is a specialized testing device for asphalt mixtures. The stress sweep tests involve subjecting the specimens to repeated loading cycles at varying stress levels to simulate the traffic loading conditions experienced by pavements.

By conducting SSR tests using the AMPT, this standard provides a means for evaluating the rutting potential of asphalt mixtures in a controlled laboratory setting. The results from these tests can be used to inform the design and selection of asphalt mixtures for pavement applications, helping to ensure the long-term performance and durability of roadways.