Identification and Recognition of Defects in Civil Structures Using Non-destructive Technique

Defects, voids and cracks are the most ineffective components of buildings and bridges, respectively. The steady state vibrations and involuntarily happenings like earth quake triggers events such as accident and incident. The presence of air gaps or voids caused by the shifting of components like steel rods accelerates towards such catastrophic failure. Infrared thermography based on remote sensing of radiation energy from concrete surface, is a non-contact technique allows the visualization of concrete surface temperature as two-dimensional thermo-grams. The paper proposes a robust technique of analysis of the defect region using infrared image and estimate the area, shape and location of defect along with its depth.