Standard Test Method for Bulk Solids Characterization by Carr Indices
|Publication Date:||1 October 2008|
|ICS Code (Particle size analysis. Sieving):||19.120|
This test method covers an apparatus and procedures for measuring properties of bulk solids, henceforth referred to as Carr Indices.2
This test method is suitable for free flowing and moderately cohesive powders and granular materials up to 2.0 mm in size. Materials must be able to pour through a 6.0 to 8.0-mm diameter funnel outlet when in an aerated state.
The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard.
This method consists of eight measurements and two calculations to provide ten tests for Carr Indices. Each individual test or a combination of several tests can be used to characterize the properties of bulk solids. These ten tests are as follows:
Test A-Measurement of Carr Angle of Repose
Test B-Measurement of Carr Angle of Fall
Test C-Calculation of Carr Angle of Difference
Test D-Measurement of Carr Loose Bulk Density
Test E-Measurement of Carr Packed Bulk Density
Test F-Calculation of Carr Compressibility
Test G-Measurement of Carr Cohesion
Test H-Measurement of Carr Uniformity
Test I-Measurement of Carr Angle of Spatula
Test J-Measurement of Carr Dispersibility
This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.
2 Carr, R.L., "Evaluating Flow Properties of Solids," Chemical Engineering, January 18, 1965, pp. 163-168.
*A Summary of Changes section appears at the end of this standard.