ABSTRACT
When water enters the bottom of the concrete slab of an airport pavement through the joints, aircraft loads can cause granulated grout material particles to erupt from the joints and create voids at the bottom of the concrete slab. The ejected granulated grout causes equipment damage due to suction into the engine. In addition, loss of support and pavement failure can severely affect aircraft navigation, therefore early detection is critical. Therefore, in this study, voids were fabricated in a specimen simulating airport pavement concrete, and various nondestructive investigations were conducted. As a result, it was found that defects could be properly detected by using electromagnetic radar and ultrasonic tomography. Based on the above results, an investigation was conducted at an actual airport pavement to verify the results.
