| Recently, studies on aggregate profile and crack propagation using X-ray CT have been reported. However, no researches have been reported on the quality control of asphalt pavements. The objective of this paper is to propose evaluation indexes such as bitumen content and gradation of the quality evaluation for asphalt mixtures using X-ray CT. The following approach was employed in this study; 1) Eight specimens of several types of asphalt mixtures were prepared; 2) Five cross sections of these specimens were scanned by X-ray CT with five cross sections; 3) Threshold values and 4 segmentation images obtained by the CT-values in order to discuss the internal behavior. The result show that histograms of CTvalues, threshold values and 4 segmentation images made from CT images are able to express differences in the bitumen content, bitumen type and mixture type. |
