Content Handbook H

Outline of method

Prior to the test the granule is sieved on a 125 ìm sieve in order to remove fine particles. A known amount of this dust-free granule is transferred to a glass bottle and is then subjected to a rolling movement with an equal amount of glass beads. After rolling for a specified
period, the attrition resistance is determined by sieving again on a 125 ìm sieve and weighing the material retained on the sieve.