ASTM D2726/D2726M-21 PDF Download

The ASTM D2726/D2726M-21 standard provides guidelines for determining the bulk specific gravity and density of compacted asphalt mixtures. This test method is useful for determining the unit weight of dense asphalt mixtures and can be used in conjunction with another test method to determine percent air voids, which indicates the relative degree of compaction.

Specific gravity, which has no units, is converted to density in order to perform calculations that require units. This conversion is done by multiplying the specific gravity at a given temperature by the density of water at the same temperature.

It is important to note that the accuracy and reliability of the results obtained from this test method depend on the competence of the personnel performing the procedure and the proper calibration and maintenance of the equipment used. Compliance with relevant specifications, such as Specification D3666, helps in evaluating and controlling various factors that can affect the reliability of the results.

However, it is important to recognize that compliance with Specification D3666 alone does not guarantee reliable results, as other factors also come into play.