AASHTO T 342-11 (2019) PDF Download

The AASHTO T 342-11 (2019) standard outlines the procedures for preparing and testing asphalt concrete mixtures to determine their dynamic modulus and phase angle. The dynamic modulus refers to the stiffness of the mixture under varying temperatures and loading frequencies, while the phase angle represents the degree of phase shift between the applied stress and strain.

This standard is specifically applicable to laboratory-prepared specimens of asphalt concrete mixtures with a nominal maximum size aggregate not exceeding 37.5 mm (1.48 in.). It provides a standardized method for evaluating the performance characteristics of hot-mix asphalt concrete, which is commonly used in road construction and pavement applications. Understanding the dynamic modulus and phase angle of these mixtures is essential for assessing their durability, resistance to deformation, and ability to withstand various traffic and environmental conditions.

It is important to note that this standard was previously designated as a provisional standard called TP 62, indicating that it has undergone revisions and updates to become an official and recognized test method within the AASHTO standards. Compliance with this standard ensures consistent and accurate testing of asphalt concrete mixtures, allowing for reliable comparison of materials and informed decision-making in the field of transportation engineering.