| 摘要 |
<p>A method of measuring an aggregate strength indication of a test sample comprising a plurality of super-abrasive grains having an aggregate mass includes measuring the size frequency distribution of the grains and providing a friability tester apparatus, which comprises a drive mechanism, a crusher ball, and a capsule having an enclosable cavity for containing the test sample and the crusher ball. The capsule is configured to be moved at a cyclically varying speed for a number of cycles by the drive mechanism. An energy indication value is calculated. The method includes enclosing the test sample and the crusher ball within the cavity; subjecting the capsule to motion, such that the energy indication value is between about 2 - 50 (Joules per gram), to produce a comminuted sample; measuring the size frequency distribution of the comminuted sample; and calculating the aggregate strength indication based on the size frequency distributions of both the comminuted sample and the test sample.</p> |
