Analyzing the Gradation of Asphalt Mixtures Based on Industrial Computerized Tomography

Wen-Liang Wu ； Duan-Yi Wang ； Xiao-Ning Zhang ； Zhi Li

《International Journal of Pavement Research and Technology》 3卷1期 (2010/01) Pp. 51-55

https://doi.org/10.6135/ijprt.org.tw/2010.3(1).51

並列摘要

The performance of asphalt pavement is influenced by the gradation of asphalt mixtures. Using industrial computerized tomography, which is a nondestructive test technique to obtain slice images, analyzing these 2D slice images, and applying probability statistical theory, the 3D volumetric gradation of asphalt mixtures under the assumption of spherical aggregates can be estimated from 2D sectional gradation. There is error between the gradations of spherical aggregate assumption and mechanical sieving and a correction method is therefore developed to convert the gradation of spherical aggregate assumption to that of mechanical sieving. By introducing correction factor C, the error becomes less than 5%, which can meet engineering requirements. The results of this study indicate that this new method of determining gradation has the advantage of improved efficiency with reasonable accuracy.

並列關鍵字

Asphalt mixture ； Digital image processing ； Gradation ； Industrial CT ； Road engineering