Different types of Non-Destructive tests (NDT) are there to detect voids and cracks in concrete such as Ultrasonic Pulse Echo, Ultrasonic Pulse Velocity, Ground Penetrating Radar, Impact Echo Method, X-ray Scanning Method, Rebound Hammer Method, Infrared Thermography Method .In which Infrared Thermography method is discussed in this paper
As concrete is used in newer areas and evidence is coming to light of premature deterioration in concrete structures there is a need to develop new methods for quality control at the time of concrete construction and for the evaluation of existing structures .Concrete specimens were designed and conditioned to represent some of the anomalies that may be found during construction and also in hardened concrete. From the study it emerges that Infrared Thermography is an effective tool for concrete placement and identifying location of voids and cracks in fresh and hardened concrete. It could be effectively used to narrow down areas that needed closer attention during an in-service inspection of concrete structures.