AASHTO T 331-13 (2017) PDF Download

AASHTO T 331-13 (2017) is a standard that outlines a method for determining the bulk specific gravity (Gmb) of compacted hot mix asphalt (HMA) mixtures using an automatic vacuum sealing method. This method is specifically designed for HMA samples that contain open or interconnecting voids and absorb more than 2.0 percent of water by volume.

The purpose of this method is to measure the bulk specific gravity of the compacted HMA, which is important for calculating the unit mass of the mixture. By determining the bulk specific gravity, engineers and technicians can better understand the density and compaction characteristics of the HMA, which is crucial for ensuring the quality and performance of asphalt pavements.

It is worth noting that this method can be used as an alternative to AASHTO T 275, another standard method for determining the bulk specific gravity of compacted HMA. Although similar to ASTM D 6752/D 6752M-11, there may be slight differences in procedure and requirements between the two standards.