### Advances in Materials Science and Engineering

For normal strength concrete (≤40 MPa), the two different cylinder sizes do not result in significant differences in test results including experimental variability, compressive strength, and static and dynamic elastic moduli.

### How to Calculate a Concrete Pad Load | Sciencing

Determine the Concrete''s Strength. This is normally measured as compression strength, measured by pounds per square inch, or psi. A common bag of concrete, for example, may have a compression strength of 4,000 psi, based on a thickness of 2 inches after it has set for 28 days. Other concrete may have a compression strength of only 550 psi.

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