COMPARATIVE PERFORMANCE OF RUBBER MODIFIED HOT MIX ASPHALT UNDER ALF LOADING

Experiment 2 at the Louisiana Accelerated Loading Facility (ALF) site involved determining the engineering benefits of using powdered rubber modifier (PRM) in hot mix asphalt mixes. Three full scale test sections were constructed and subjected to increasing loads from the ALF. Lane 2-1 included PRM in the wearing course, lane 2-2 included PRM in the base course, and lane 2-3 was the control section. Distress and deflection measurements were performed every 25,000 applications of the ALF. Laboratory material characterizations of test lane materials were used in ABAQUS and FLEXPASS modeling studies to predict the behavior and performance of the test lanes. Comparisons of observed and predicted rutting were developed and discussed. Deflection measurements were used to develop a-values for the powdered rubber modified layers for use in pavement design. The recommended a-value for the PRM wearing course was 0.25; it was 0.45 for the PRM base.

• Record URL:
  http://www.ltrc.lsu.edu/pdf/report_374.pdf
• 
• Corporate Authors:

  Louisiana Tech University, Ruston

  Ruston, LA  United States  71272

  Louisiana State University, Baton Rouge

  Department of Civil and Environmental Engineering
  Baton Rouge, LA  United States  70803

  Louisiana Transportation Research Center

  4101 Gourrier Avenue
  Baton Rouge, LA  United States  70808

  Federal Highway Administration

  1200 New Jersey Avenue, SE
  Washington, DC  United States  20590
• Authors:
  • Roberts, F L
  • Mohammad, L N
  • Qin, Huabiao
  • Huang, Biao
• Publication Date: 2003-8

Language

• English

Media Info

• Features: Figures; References; Tables;
• Pagination: 97 p.

Subject/Index Terms

• TRT Terms: Accelerated tests; Asphalt rubber; Base course (Pavements); Deflection; Hot mix asphalt; Pavement distress; Pavement performance; Rutting; Wearing course (Pavements)
• Uncontrolled Terms: Accelerated loading facilities; Powdered rubber modifier
• Subject Areas: Design; Highways; Materials; Pavements; I22: Design of Pavements, Railways and Guideways; I23: Properties of Road Surfaces; I31: Bituminous Binders and Materials;

Filing Info

• Accession Number: 00969822
• Record Type: Publication
• Report/Paper Numbers: FHWA/LA.03/374
• Contract Numbers: State Project No. 736-99-0633, LTRC Project No. 99-3B
• Files: TRIS, USDOT
• Created Date: Feb 9 2004 12:00AM