Quantification of Particle Shape and Angularity Using the Image Analyzer

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Courtesy of ASTM International

The image analyzer commonly used by the powder metallurgists has been successfully employed to quantify angularity and shape characteristics of granular materials. In this paper a detailed procedure has been outlined. Results of investigation of different natural sands are presented in the form of a distribution of tangent count taken as a measure of angularity. Powers´ roundness index has been calibrated against the tangent count. Mechanical properties of different sands have been shown to be correlated with angularity.

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