ASTM D6773

1.1 This method covers the apparatus and procedures for measuring the unconfined yield strength of bulk solids during both continuous flow and after storage at rest. In addition, measurements of internal friction, bulk density, and wall friction on various wall surfaces are included. The SI system of units has been used throughout.

1.2 The most common use of this information is in the design of storage bins and hoppers to prevent flow stoppages due to arching and ratholing, including the slope and smoothness of hopper walls to provide mass flow. Parameters for structural design of such equipment may also be derived from this data. Another application is the measurement of the flowability of bulk solids, for example, for comparison of different products or optimization.

1.3 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. Referenced Documents

D6128 Standard Shear Testing Method for Bulk Solids Using the Jenike Shear Cell
D653 Terminology Relating to Soil, Rock, and Contained Fluids

Index Terms

bulk solid; effective angle of friction; effective yield locus; flow function; flowability; Jenike Shear Cell; internal friction angle; kinematic wall friction angle; powder; Schulze Ring Shear Tester; translational shear tester; unconfined yield strength; wall friction; ICS Number Code 59.080.01

Citing ASTM Standards

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