The CoreLok is an extremely versatile system for the measurement of the bulk specific gravity and maximum specific gravity (Gmm) of asphalt. It measures the apparent specific gravity, absorption and bulk specific gravity of fine and coarse aggregates. Its downloadable PC software has built-in features for calculation of gravity and absorption of asphalt and aggregates. It uses a 1.5 hp rotary vacuum pump. It has a chamber size of 17 x 17 x 17 ” and its footprint dimensions are 19.25 x 25 ” / 489 x 636 mm.