Measurement of the Deformation Behavior of Asphalt Mixture by Using A High-speed Camera

Traffic load to a road surface is usually applied in an extremely short time period. For instance, a vehicle moving at 60 km/h requires only about 0.012 seconds to pass through a given point. Asphalt mixture which is almost viscoelastic object receives major impacts from temperature and loading time and is likely to behave in a complex manner during hot summer seasons or under high temperature conditions. Such behaviors are one of the key factors in understanding how rutting and other problems occur and damage road pavements. This study was an attempt to measure deformation behavior of asphalt mixture under instantaneous load using a high speed camera (capable of capturing up to 1,000,000 images per second). The proposed method successfully provided a planar expression of the deformation behavior of asphalt mixture under instantaneous loading, and the strain values obtained by image analysis using PIV were found to be in good fit with strain gauge measurement results.