ABSTRACT
The deterioration of pavement is a complex phenomenon including the deterioration of road surface and the decrease in the load bearing capacity of the entire pavement. The deterioration state of road surface can be observed directly through routine patrols and visual inspections. Road administrators can observe the deterioration state of road surface, by conducting the road surface state inspection on a regular basis. The deterioration of the base or lower layer affects the deterioration rate of road surface. The deterioration state of a pavement structure can be grasped by directly observing it through the open-cut inspection, specimen sampling, and deflection amount measurement, and indirectly gauging it with a non-destructive test, such as the falling weight deflectometer (FWD) survey and the Benkelman beam test. In order to rationalize pavement management, it is necessary to conduct an intensive FWD survey on a regular basis for designing pavement repair strategies.
