Prall
The CRT-Prall is designed to carry out the Prall Test according to EN 12697-16A Method A in which a cylindrical specimen of asphalt having a diameter of 100mm and a length of 30mm is tested at a temperature of 5o C. THe specimen is worn by abrasive action over a standard time period of 15 minutes by 40 steel spheres. The loss of volume in millillitres is recorded and reported as the abrasion value.
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You can get the Coopers model CRT-PRALL in two versions, 2- and 4-places. That saves a lot of time and gives less wear on the machine.