AASHTO T 378-17 PDF Download

AASHTO T 378-17 is a standard method of test that provides guidelines for determining the dynamic modulus and flow number of asphalt mixtures using the Asphalt Mixture Performance Tester (AMPT). The dynamic modulus is a measure of the stiffness of an asphalt mixture, which is important for predicting its performance under various loading conditions. The flow number, on the other hand, is a measure of the resistance to permanent deformation or rutting.

This standard applies to asphalt mixtures that have dense or gap-graded aggregate gradations, with maximum aggregate sizes up to 37.5 mm. The test is conducted using the AMPT equipment, which allows for controlled and repeated loading and unloading of asphalt samples to determine their dynamic modulus and flow number.

The purpose of this standard is to provide consistent and reliable test methods that can be used to evaluate the mechanical properties of asphalt mixtures. By determining the dynamic modulus and flow number, engineers can assess the performance characteristics of asphalt mixtures and make informed decisions regarding their suitability for specific applications. The test results obtained using AASHTO T 378-17 can also be used for quality control and quality assurance purposes in asphalt mixture production.