ASTM-D8328 2024

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D8328-24 Standard Test Method for Dynamic Testing of Powders Using the Freeman Technology FT4 Powder Rheometer

Published By	Publication Date	Number of Pages
ASTM	2024

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Category: ASTM

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Description

ASTM D8328-24

Active Standard: Standard Test Method for Dynamic Testing of Powders Using the Freeman Technology FT4 Powder Rheometer

ASTM D8328

Scope

1.1 This method covers the apparatus and procedures for quantifying the dynamic flow properties of a fixed volume of powder or other bulk solid as a function of its resistance to being moved by a specially designed blade within a cylindrical test vessel, where the test specimen has an unconstrained upper surface. This allows for the resistance to motion to be assessed as ‘work done’ or energy measurement.

1.2 The parameters generated during this test are most commonly used to assist with the design and operation of powder processing and transport operations. They can also provide relative classification or comparison of the flow behavior of different powders, or different batches of the same powder, that are subjected to similar stress and flow regimes within their processing equipment.

1.3 The 50 mm apparatus described in this standard is suitable for measuring the properties of powders and other bulk solids with a maximum particle size of 6 mm. It is practicable to test powders which have a small proportion of particles between 6-10 mm, but it is recommended they represent no more than 5 % of the total mass with a normal (Gaussian) size distribution.

1.4 All observed and calculated values shall conform to the guidelines for significant digits and rounding established in Practice D6026.

1.4.1 The procedures used to specify how data are collected/recorded or calculated, in this standard, are regarded as the industry standard. In addition, they are representative of the significant digits that generally should be retained. The procedures used do not consider material variation, purpose for obtaining the data, special purpose studies, or any considerations for the user’s objectives; and it is common practice to increase or decrease significant digits of reported data to be commensurate with these considerations. It is beyond the scope of this standard to consider significant digits used in analysis methods for engineering design.

1.5 Units—The values stated in SI units are to be regarded as standard. No other units of measure are included in this standard. Reporting of test results in units other than SI shall not be regarded as nonconformance with this standard.

1.6 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, health, and environmental practices and determine the applicability of regulatory limitations prior to use.

1.7 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.

Keywords

aerated energy; aeration ratio; basic flowability energy; conditioned bulk density; consolidated energy; consolidation index; dynamic testing; flow rate index; Freeman Technology; FT4 powder rheometer; normalized aeration sensitivity; powder; pressure drop; specific energy; stability index;

ICS Code

ICS Number Code n/a

DOI: 10.1520/D8328-24

Additional information

Standard Title	D8328-24 Standard Test Method for Dynamic Testing of Powders Using the Freeman Technology FT4 Powder Rheometer
Published Code	ASTM
Publication Date	2024