Unconfined Compressive Strength Testing

Unconfined Compressive Strength of Rock Core Specimens

• Test Method for Unconfined Compressive Strength of Rock Core Specimens (PDF)

Please note that rock with an HCSI of 3 or less are capped with high-strength gypsum cement while rock with an HCSI of 4 or greater are not typically capped, but ground flat.