Analyzing the Gradation of Asphalt Mixtures Based on Industrial Computerized Tomography

Asphalt pavement performance is influenced by the gradation of asphalt mixtures. Using industrial computerized tomography, a nondestructive test technique used to obtain slice images, analyzing these 2-D slice images, and applying probability statistical theory, the 3-D volumetric gradation of asphalt mixtures under the assumption of spherical aggregates can be estimated from 2-D 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. Results of this study indicate that this new method of determining gradation has the advantage of improved efficiency with reasonable accuracy.


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  • Accession Number: 01152136
  • Record Type: Publication
  • Files: TRIS
  • Created Date: Feb 28 2010 7:45PM