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.
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Corporate Authors:
Louisiana Tech University, Ruston
Ruston, LA United States 71272Louisiana State University, Baton Rouge
Department of Civil and Environmental Engineering
Baton Rouge, LA United States 70803Louisiana Transportation Research Center
4101 Gourrier Avenue
Baton Rouge, LA United States 70808Federal 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