Evaluation of Florida Asphalt Mixes for Crack Resistance Properties using the Laboratory Overlay Test Procedure

The primary objective of this research study is to evaluate the applicability of using the overlay test to characterize common asphalt mixtures for crack resistance in flexible pavement design in Florida. Cracking performance of common Florida asphalt mixtures were evaluated using laboratory Overlay Test (OT) procedure. Nine standard mixes for traffic level C & E, which included SP-12.5, SP-9.5, and SP-4.75 mix designs, were selected to conduct the overlay test. The mixtures were prepared using both PG 67-22 virgin asphalt binder and PG 76-22 polymer modified asphalt (PMA) binder. The effects of material characteristics, polymer modifier, and reclaimed asphalt pavement (RAP) on the crack resistance of Florida asphalt mixtures were evaluated. The test results had a good agreement on the three replicate samples. The coefficients of variation (COV) were less than 20% for all types of mixtures. It was found that SP-9.5 mixtures had the best cracking performance compared to SP-12.5 and SP-4.75 mixtures when RAP was included. Considerable effects were found on the asphalt binder and RAP. Crack resistance of asphalt mixtures was significantly improved if PMA binder was used. However, the crack resistance was decreased when 20% RAP was included in the mix designs. A simplified fracture mechanics analysis was conducted to obtain the fracture properties from Paris’ Law. Crack indices, which can be easily obtained from the OT test results, are introduced and correlated to fracture properties.

• Record URL:
  https://fdotwww.blob.core.windows.net/sitefinity/docs/default-source/research/reports/fdot-bdv30-977-06-rpt.pdf
• 
• Summary URL:
  https://fdotwww.blob.core.windows.net/sitefinity/docs/default-source/research/reports/fdot-bdv30-977-06-sum.pdf
• Record URL:
  https://rosap.ntl.bts.gov/view/dot/39555
• Record URL:
  https://rosap.ntl.bts.gov/view/dot/39554
• Corporate Authors:

  Florida State University, Tallahassee

  Department of Civil and Environmental Engineering
  Tallahassee, FL  United States  32306

  Florida Department of Transportation

  Research Center
  605 Suwannee Street MS-30
  Tallahassee, FL  United States  32399-0450

  Federal Highway Administration

  1200 New Jersey Avenue, SE
  Washington, DC  United States  20590
• Authors:
  • Sheng, Biqing
  • Ping, W V
• Publication Date: 2016-1-29

Language

• English

Media Info

• Media Type: Digital/other
• Edition: Final Report
• Features: Appendices; Figures; Photos; References; Tables;
• Pagination: 164p

Subject/Index Terms

• TRT Terms: Asphalt mixtures; Evaluation; Fracture mechanics; Laboratory tests; Mix design; Pavement cracking; Pavement design; Pavement performance; Polymer asphalt; Reclaimed asphalt pavements
• Geographic Terms: Florida
• Subject Areas: Highways; Materials; Pavements; I22: Design of Pavements, Railways and Guideways; I31: Bituminous Binders and Materials;

Filing Info

• Accession Number: 01591964
• Record Type: Publication
• Report/Paper Numbers: FDOT BDV30 TWO 977-06, FSU No. OMNI 034114
• Files: NTL, TRIS, ATRI, USDOT, STATEDOT
• Created Date: Feb 29 2016 4:54PM