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The compressive strength of concrete is an important parameter to determine its performance during service conditions. It is defined as the concrete's resistance to failure under compressive forces. This test method is for the determination of the compressive strength of molded (cast) or drilled (cored) concrete cylinders and molded concrete cubes. The test method consists of applying a compressive axial load at a prescribed rate until failure occurs.  The compressive strength of the concrete is calculated by dividing the maximum load by the cross-sectional area.

 

Data entry and calculations for this test are performed on the Concrete Compressive Strength form described in the next section. After the data and calculations have been performed the results are displayed in a test report as described in the reporting section below. The format of this report is controlled by the geotechnical template used for the test.

 

The methodology and calculations for this test adhere to "ASTM C39/C39M-05 Standard Test Method for Compressive Strength of Cylindrical Concrete Specimens" and "ASTM C873/C873M-10a Standard Test Method for Compressive Strength of Concrete Cylinders Cast in Place in Cylindrical Molds". For more detailed information on the methodology and calculations please review these standards.