Analysis of Aggregate Gradations Using Image Analysis Technique through Bailey Method

Aggregate gradation plays a vital role in the performance of an asphalt mixture as the stress distribution in the mix depends upon the aggregate gradation. The grain to grain contact depends upon the gradation and could be analyzed by examining the structure using image analysis technique. Bailey method evaluates a gradation and optimizes the gradation to improve its grain-to-grain contact and facilitate anti-rutting properties. The current study focuses on the relation between the Bailey method’s gradation parameters and the permanent deformation characteristics through internal aggregate structure characterization using image analysis technique. Image processing techniques using MATLAB software was used to determine the contact points (CP) and contact length (CL) of the gradations. Rut resistance increased with increase in coarse aggregate (CA) ratio and decrease in coarser portion of fine aggregate (FAc) and finer portion of fine aggregate (FAf) ratios. The mixes which have higher rut depths were found to have lower contact points and contact length. Through this study, it was concluded that Bailey method of gradation would be useful in selecting certain gradations which are resistant to permanent deformation. Correlation matrix revealed CA ratio significantly affects contact points and contact length.


  • English

Media Info

  • Media Type: Web
  • Pagination: pp 371-382
  • Monograph Title: International Conference on Transportation and Development 2019: Innovation and Sustainability in Smart Mobility and Smart Cities

Subject/Index Terms

Filing Info

  • Accession Number: 01731345
  • Record Type: Publication
  • ISBN: 9780784482582
  • Files: TRIS, ASCE
  • Created Date: Aug 28 2019 3:01PM