Research on Influencing Factors and Its Optimization of Scanning Asphalt Mixture Based on X-ray CT Technology

Through 225 KV industrial CT equipment,we discussed the effect of sample size,aggregate lithology,and compaction mode on scanning imaging quality,and the scanning parameters of common Marshall specimens of asphalt mixture are optimized. The result shows that(1) greater sample size induces worse image quality;(2) granite mixture is most suitable for subsequent image processing analysis;(3)compaction ways can affect imaging quality. Finally,we recommended the best scanning parameter combination of Marshall specimen of asphalt mixture which can improve scanning accuracy and scanning efficiency.