Correlation Curves to Characterize Concretes by Means of Non-destructive Tests

There are many technologies available for supervising and investing quality of concrete. These methods are not only limited to laboratory test but also in-situ tests are available for previously constructed structures. Now a day, numerous NDT methods are available for finding the strength and other features of concrete such as CAPO test, rebound hammer test, ultrasonic pulse velocity test etc. Out of these NDT test ultrasonic pulse velocity method (UPV) and rebound hammer (RH) are extensively accepted by researchers and engineers as they are relatively simple to perform and identify the readings. Though, the analysis of test data is not simple, because the results are significantly influenced by environmental exposure to which structure it is rendering. So, it is needed to establish a correlation between outcomes of these techniques and actual strength of concrete structures before assessing the strength of existing structures. In the present research, a correlation has been recognized between compressive strength of concrete structures and NDT results.