A new ASTM International standard helps users undertake shear testing using the Freeman Technology FT4 Powder Rheometer. Entitled, “Standard Test Method for Shear Testing of Powders using the Freeman Technology FT4 Powder Rheometer Shear Cell,” ASTM D7891 details the apparatus and procedures for evaluating the incipient failure properties of a powder under consolidation, including the determination of parameters such as cohesion, unconfined yield strength and flow function.
D7891 is published by Subcommittee D18.24 on Characterization and Handling of Powders and Bulk Solids, part of ASTM International Committee D18 on Soil and Rock.
The FT4 overcomes many of the recognized challenges of shear cell testers by providing an instrument with a fully automated test procedure and an intuitive software interface, according to the company. The system is optimized to generate reliable, repeatable results, even when working with challenging materials or when operating at exacting low stress conditions. The FT4 enables users to evaluate dynamic flow and bulk properties to understand how powders will behave across a wide range of conditions and in various unit operations.
For more information, visit: www.freemantech.co.uk