2008 Volume 3 Issue 1 Pages 13-23
In general, detached layers of airport asphalt pavement are detected with extraordinary sounds made by a hammer when it is hit on the pavement surface at nights. However the investigation needs a lot of workers and efforts because targeted area of airport asphalt pavement is so large. Therefore a new method is attempted in the study. The method takes infrared thermography continuously while a car on which cameras are mounted is driven. It was conducted on a real runway to see whether stripping damages in between the airport pavement layers were efficiently detected or not. As a result, dotted low-temperature distributions of the pavement surface were found at some locations. Most of them were found at the same or quite near places where extraordinary sounds were made by hammer-hitting. Then finite element analyses were carried out to simulate the surface temperature distributions of deteriorated pavements. The results show good agreement with the ones obtained from the filed investigation. These facts suggest the infrared thermography scanning is a quite promising technique to detect detached layers of airport asphalt pavement.
