Do you have frac sand? Episode 2 – Sphericity and Roundness test

Ok, in the next audio/video episode, I go over the sphericity and roundness testing for frac sand.

Here is a picture of the Krumbein and Sloss chart that is used during the test.

This is the Krumbein and Sloss chart that is used to determine the roundness and sphericity of frac sand. It takes a careful examination of the sand particles and attention to detail -- and patience! -- to properly conduct this test.
This is the Krumbein and Sloss chart that is used to determine the roundness and sphericity of frac sand. It takes a careful examination of the sand particles and attention to detail — and patience! — to properly conduct this test.

The API standard recommends that sphericity and roundness both be above 0.6 as read from this chart.

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