ISO 5937:1980
Withdrawn
A Withdrawn Standard is one, which is removed from sale, and its unique number can no longer be used. The Standard can be withdrawn and not replaced, or it can be withdrawn and replaced by a Standard with a different number.
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18-02-2019
English, French
01-11-1980
Specifies a method, the principle of which consists in breaking down a sample by a high velocity jet of air in a small fluidized bed, calculating the amount of breakdown (attrition) from the change in particle size distribution of the test portion before and after fluidization, and expressing the degree of attrition as the increase in the percentage of material which passes through a screen of aperture size 150 um.
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