In-situ Non-destructive Evaluation Of Concrete Structures Using Shearography

Abstract

At present the core test is commonly employed for evaluating concrete strength of aging structures. The core test, which requires coring concrete samples for subsequent off-site laboratory test, is somewhat destructive and only limited to taking samples from a few locations. This paper reports a novel optical technique based on shearography for non-destructive evaluation of concrete strength. The technique does not require coring, and therefore allows test on many structural locations to be performed. The preliminary results have demonstrated that the technique has a great potential for development into a practical tool for evaluation of concrete strength.