AASHTO T 275-17 PDF Download

The AASHTO T 275-17 standard provides a methodology for determining the bulk specific gravity (Gmb) of compacted hot mix asphalt (HMA) using paraffin-coated specimens. This test is used to measure the density of the compacted HMA, which is important for calculating the unit mass of the mixture.

The standard specifies that this method should be used for samples that contain open or interconnecting voids, or for samples that absorb more than 2.0 percent of water by volume as determined by the T 166 test method. This indicates that the test is specifically designed for HMA samples that exhibit certain characteristics, such as higher water absorption or the presence of voids.

By determining the bulk specific gravity of compacted HMA, this standard provides a reliable measure of the density of the mixture, which can be used to assess the quality and performance of asphalt pavements. The use of paraffin-coated specimens ensures that the asphalt does not stick to the laboratory equipment during testing, allowing for accurate and repeatable results.