AASHTO T 209-19 PDF Download

AASHTO T 209-19 is a standard method that describes the procedure for determining the theoretical maximum specific gravity (Gmm) and density of hot mix asphalt (HMA). The test is performed at a temperature of 25°C (77°F). The purpose of this test is to measure the maximum density that can be achieved for a given asphalt mixture.

It is important to note that the precision of the method is best when the procedure is performed on samples that contain aggregates that are completely coated with asphalt binder. Therefore, in order to obtain accurate results, it is recommended to perform the test on samples that are close to the optimum asphalt binder content.

The determination of Gmm and density is an essential step in the quality control of HMA, as it provides important information about the compactability and performance of the asphalt mixture. This standard provides guidelines for ensuring the accuracy and consistency of these measurements, contributing to the overall quality and durability of hot mix asphalt pavement.