Abstract— This work present a correlation and comparison between Non- Destructive test (Rebound Hammer) & Destructive test of testing the compressive strength of concrete cubes for Linear, Quadratic & Cubic Relation. Concrete cubes of 150mm×150mm×150mm were cast of M-20, M-25, M-30 and M-35 grades and each grade cured for 7days, 14days and 28days. A total 120 cubes were cast. When analyses were carried out, there are a relation between the results of rebound number obtained from rebound hammer and compressive strength obtained from compression machine. These results i.e. rebound number and compressive strength value of cubes M-20, M-25, M-30 and M-35 grades were correlate and compared with Linear, Quadratic & Cubic Equation and checked from which equations among these three gives a more accurate results with compressive strength. After analyses it was found that among three of them predicted strength of cube only the linear and quadratic equation gave more accurate relationships with compressive strength of concrete. And at the end it also gave statistical analysis of the results which shows that there were a significant difference between the rebound number and compressive strength.
Keywords— Concrete, Compressive Strength, Destructive Testing (DT), NON-Destructive Testing (NDT), Correlation.
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