How To Check Core Strength Of Concrete

The Fundamental purpose of measuring the strength of concrete test specimens is to estimate the strength of concrete in the actual structure. For procedure Please refer IS 516, IS 456 and IS 10262, SP 24. In these, you will find technical aspects of strength developments and testing of concrete. You should read for acceptance criteria of concrete thoroughly.

1. According to the thickness of the structure, dia and depth of core are decided.
2. The sample is taken by drilling a core by core cutter machine into a structure.
3. The sample is cut to required depth/ height by grinding both ends and surface is made plain ( sometimes ceramic/cementitious adhesive use to level both end - process is called as caping)
4. After this sample is cured for 2 days.
5. Then tested by compression testing machine.
6. Results of load are recorded and compressive strength is calculated.
7. As per the table, correction made by multiplying calculated strength with the correction factor.
8. Do check IS code for complete detailing.