CENTRIFUGE EXTRACTOR(HAND OPERATED)
ASTM : D2172, AASHO: T-58, T-164.
This instrument is used for determination and checking of bitumen percentage in bituminous mix, the mix is added with a solvent and dissolved bitumen is removed by centrifugal action. Consists of a removal aluminium rotor bowl, capacity 1500gms. with a cap and tightening nut. The bowl assembly is mounted on a vertical shaft which protrudes from a cast housing. This shaft and thus the bowl is rotated fast manually by enclosed gears in the cast body and handle. Solvent is introduced during the test through the holes in the cap of the housing. a drain is provided to collect dissolved bitumen coming out of the rotating bowl and getting collected in the housing.