In this study, a reinforced concrete slab specimen with an asphalt pavement was prepared in which horizontal cracks were artificially simulated. Horizontal cracks were detected from the pavement sur- face by the impact elastic-wave method. Influence of varying frequency of…
In this study, a reinforced concrete slab specimen with an asphalt pavement was prepared in which horizontal cracks were artificially simulated. Horizontal cracks were detected from the pavement sur- face by the impact elastic-wave method. Influence of varying frequency of input elastic wave on the detection of artificial flaws and applicability of detecting method was discussed. As a result, it was revealed that artifi- cial flaws were highly detectable, by implementing the impact elastic-wave method from the asphalt pave- ment surface, in a specimen with an assumed thickness of an ordinary reinforced concrete high way bridge slab and horizontal cracks at assumed locations (depths). It was also found that a single optimum diameter of the steel sphere could be determined for the impact elastic-wave method as long as it would be used only for the detection of horizontal cracks in reinforced concrete highway bridge slabs.