ASTM C1231

Full Name

ASTM C1231 – Standard Practice for Use of Unbonded Caps in Determination of Compressive Strength of Hardened Cylindrical Concrete Specimens


This practice covers requirements for a capping system using unbonded caps for testing concrete cylinders molded in accordance with Practice C31 or C192, or cores obtained in accordance with Test Method C42.


cap; compressive strength; concrete; concrete test; elastomeric; neoprene; pad cap; rubber; unbonded cap

ASTM C1231 Accredited Laboratory

Applied Testing & Geosciences, LLC is accredited for performing tests using the ASTM C1231 standard.

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