The A-516 is a vacuum pycnometer used in Rice Testing for bituminous mixes with maximum aggregate size of ¾ in. (19.1 mm). The 2000 g capacity vacuum pycnometer has 4.5 liter (1.2 gal) capacity. A transparent lid on the pycnometer allows the operator to observe the bubble release from the asphalt sample during the vacuum test. A second volumetric lid of machined aluminum, tapered with a capillary bore, is provided so the unit can be used as a volumeter for determing the specific gravity of compacted bituminous mixes.
Both large capacity vacuum pycnometers include an aluminum volumetric canister, volumetric lid, flat Plexiglass vacuum lid with O-ring, volumeter, release valve, fittings, a metal aspirator with 3/8 inch IPT fittings and 6 ft of hose.