In Service NDI for Delamination of Rehabilitated RC Slab

摘要

An ultrasonic pulse technique and infrared imaging system were applied to thernreinforced concrete(referred as RC thereafter) slabs removed from an existingrnbridge in a replacing work to detect de- lamination. Moreover, nondestructiverninspection (referred as NDI thereafter) methods were adapted tornthe slab in service to weigh the applicability. This study showed that pulsernecho technique could make an accurate evaluation of the bond at the interfacernbetween the substrate and the overlay. Infrared imaging system suggested arnpossibility of the de-lamination detection.