Evaluate the contribution of the mixture components on the longevity and performance of FC-5.

Details

• Creators:
  Bennert, Thomas ; L. Allen Cooley,
• Corporate Creators:
  Rutgers University. Center for Advanced Infrastructure & Transportation
• Subject/TRT Terms:
  • Friction course
  • Durability
  • Mix design
  • Fatigue cracking
  • Tensile strength
  • Pavement performance
  • Laboratory tests
  • Asphalt content
  • Service life
  • Binders
  More +
• Publication/ Report Number:
  BDS15 977-01
• Resource Type:
  Tech Report
• Geographical Coverage:
  Florida
• Corporate Publisher:
  Florida. Dept. of Transportation
• Abstract:
  The focus of the project was to evaluate how to improve the longevity of FDOT’s FC-5 mixtures. In particular, what FC-5 mixture ; components have the greatest impact on improving the cracking and durability of the FC-5 mixture. The data mining of FDOT Pavement ; Management System (PMS) database, provided valuable information regarding typical service life of FC-5 mixtures. Combined with ; material datasheets from production, the fatigue and durability of the FC-5 mixtures was found to be a function of the effective asphalt ; content of the mix, with little to no influence from traffic and pavement structure. This was further validated during an extensive field ; visit. Laboratory testing consisted evaluating current mix design procedures, finer nominal aggregate size (NMAS) FC-5 mixtures, and ; the influence of production tolerances on the durability, cracking, and rutting performance. The research conducted showed that asphalt ; contents could be increased by up to 0.6% if Pie-Plate testing was conducted using the PG76-22 and ARB-12 proposed for the mix. A 9.5 ; mm NMAS FC-5 mixture improves durability and fatigue performance over the current 12.5 mm NMAS FC-5, but rutting issues were ; observed in the Hamburg test, especially with the ARB-12 asphalt binder. Current production tolerances for FC-5 mixtures seem ; appropriate, except for the 0.6% reduction in binder content and the finer side of the gradation tolerance for ARB-12 binders. The 0.6% ; below optimum asphalt content tolerance resulted in mixtures with poor Overlay Tester fatigue performance and higher Cantabro Abrasion ; Loss values. ARB-12 asphalt binders may create stability issues when FC-5 gradations are on the finer side of the production tolerance, as ; it is hyporthesized that the residual crumb rubber was pushing the aggregate skeleton apart. Stone-on-stone contact verification using the ; Voids in Coarse Aggregate (VCA) approach would help to rectify this potential issue.
  More +
• Format:
  PDF
• Download URL:
  https://rosap.ntl.bts.gov/view/dot/27461/dot_27461_DS1.pdf
• File Type:
  [PDF - 3.01 MB]
• Collection(s):
  University Transportation Centers ; US Transportation Collection
• Main Document Checksum:
  urn:sha256:5b88b9e12ffd926afcd5a745115a663dfa91c0ee14e75d4ec2db8371e5ada527