Diagnostics of Bridge Pavements by Ground Penetrating Radar

The paper aims to determine bridge pavement thickness accuracy by using ground penetrating radar (GPR) and to identify potentially risky spots, where a crack may occur due to the effect of variable thickness and insufficient connection of layers. The measurements were performed in the vicinity of patches in asphalt layers, which had been accurately measured before they were filled. The use of auto calibrating methods for the determination of electromagnetic (EM) signal propagation velocity through pavement, which needs no cores, was tested.