Improved Methodology for Mix Design of Open-Graded Friction Courses

This study presents an improved methodology for the mix designs of open-graded friction courses (OGFC). The methodology has been enhanced by the development of an Excel macro in order to suggest revisions to California Test 368, Standard Method for Determining Optimum Binder Content (OBC) for Open-Graded Asphalt Concrete. A primary objective was to evaluate the effect that fines content has on mix performance. The proposed OGFC mix design includes two phases, volumetric mix design and performance testing. It was found that an increase of fines content is significant in reducing Cantabro loss, preventing draindown, minimizing the variation of Superpave gyratory compaction curves, and producing more consistent HWTD test results, suggesting that the fines content should be part of the OGFC performance specifications. This study also demonstrated the accuracy of the measured air-void contents of Superpave gyratory-compacted specimens that were fabricated with height control rather than gyration control and with binder contents calculated based on the volumetric equation, VCADRC. A preliminary comparison indicated that the proposed mix design produces similar binder contents for conventional and asphalt rubber binders with similar gradations, and that unreasonably low binder contents it may produce indicate a fines content that is too high. This improved OGFC mix design together with the Excel macro developed provides a rational, accurate, and convenient methodology for determining optimum binder range. Further studies are required to establish the proper performance specifications that relate to field performance.

• Record URL:
  http://www.its.ucdavis.edu/research/publications/publication-detail/?pub_id=2354
• Record URL:
  http://www.ucprc.ucdavis.edu/PDF/UCPRC-RR-2013-06.pdf
• Record URL:
  https://merritt.cdlib.org/d/ark%3A%2F13030%2Fm5bg438n/1/producer%2F893233240.pdf
• 
• Availability:
  • Find a library where document is available. Order URL: http://worldcat.org/oclc/893233240
• Corporate Authors:

  University of California, Davis

  Pavement Research Center, One Shields Avenue
  Davis, CA  United States  95616

  University of California, Berkeley

  Institute of Transportation Studies, Pavement Research Center
  1353 South 46th Street
  Richmond, CA  United States  94804

  California Department of Transportation

  Division of Research and Innovation
  1227 O Street, MS-83
  Sacramento, CA  United States  94273-0001
• Authors:
  • Tsai, Bor-Wen
  • Fan, A
  • Harvey, John T
  • Monismith, Carl
• Publication Date: 2012-9

Language

• English

Media Info

• Media Type: Digital/other
• Features: Appendices; Figures; References; Tables;
• Pagination: 123p
• Serial:
  • University of California Pavement Research Center Research Report

Subject/Index Terms

• TRT Terms: Bituminous binders; Fines (Materials); Friction course; Methodology; Mix design; Open graded aggregates; Pavement design; Pavement performance; Performance based specifications
• Identifier Terms: Excel (computer program)
• Subject Areas: Highways; Pavements; I22: Design of Pavements, Railways and Guideways;

Filing Info

• Accession Number: 01545638
• Record Type: Publication
• Source Agency: UC Berkeley Transportation Library
• Report/Paper Numbers: UCPRC-RR-2013-06
• Contract Numbers: CA152362A
• Files: CALTRANS, TRIS, ATRI, STATEDOT
• Created Date: Nov 26 2014 4:01PM