The test specimen used for determining the compressive strength of concrete in the United States is a

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The standard test specimen used for determining the compressive strength of concrete in the United States is a 6-inch diameter and 12-inch high cylinder. This cylinder size is used for most concrete strength testing, including the determination of the compressive strength of concrete in bridges, highways, and other construction projects.

The Test Specimen Used for Determining the Compressive Strength of Concrete