This method covers the determination of bulk specific gravity ( G mb ) of specimens of compacted asphalt mixtures. This method should be used with samples that contain open or interconnecting voids and/or absorb more than 2.0 percent of water by volume, as determined by AASHTO T 166. An agency may specify this method as an alternative to AASHTO T 275. The bulk specific gravity ( G mb ) of the compacted asphalt mixture may be used in calculating the unit mass of the mixture. This standard was formerly designated as provisional standard TP 69.