To measure the resistance of bituminous mixtures to stripping of the asphalt from the rock particles and is generally used to evaluate the mineral aggregate. It may be used to judge the adhesive capacity of the bituminous material. Stone screenings for use in seal coats or open graded mixes are usually subjected to this test. The test is applied to the aggregate fraction passing 3/8 inch sieve and retained on No.8 sieve. It consists of a disc rotation at a speed of approximately 100 r.p.m. Disc carries four bottles. Complete with a time switch.

Suitable for operation on 230 volts, 50 Hz., single phase, A.C. supply