Development of a design methodology for asphalt treated mixtures.

Details

• Creators:
  Mohammad, Louay N. ; Nazzal, Munir D. ; King, Bill ; Austin, Aaron
• Corporate Creators:
  Louisiana. Dept. of Transportation and Development
• Corporate Contributors:
  United States. Federal Highway Administration
• Subject/TRT Terms:
  Aggregate Gradation Asphalt Mixtures Binders Deformation Field Tests Overlays (Pavements) Pavement Design Pavement Performance
• Publication/ Report Number:
  FHWA/LA.09/453
• Resource Type:
  Tech Report
• Geographical Coverage:
  Louisiana
• Corporate Publisher:
  Louisiana. Dept. of Transportation and Development
• Abstract:
  This report summarizes the results of a study that was conducted to develop a simplified design methodology for asphalt
  
  treated mixtures that are durable, stable, constructible, and cost effective through the examination of the performance of
  
  mixtures that have different aggregate gradation from typically available sources. The study was conducted in two parallel
  
  parts, Part I and Part II. Part I consisted of developing a design methodology for asphalt treated mixtures and conducting a
  
  laboratory testing program to characterize the behavior of the designed mixtures. Eight aggregate sources and two types of
  
  asphalt binders were considered in this part. Part I of this study also included conducting static as well as repeated load
  
  triaxial tests to characterize the performance of three unbound granular base materials. Furthermore, a parametric analysis was
  
  conducted using MEPGD software to evaluate the benefits of incorporating the asphalt treated mixtures in the design of a
  
  pavement structure. In Part II four overlay rehabilitation projects were selected in Louisiana to evaluate the constructability
  
  and in-situ proprieties of the asphalt treated mixtures designed in Part I. The results of Part I showed that the asphalt treated
  
  mixtures containing limestone aggregates, LS I and LS II, had the best laboratory performance among all other mixtures
  
  designed in this study. Furthermore, their performance was similar to conventional base course HMA ones at high and
  
  intermediate temperatures. The results of the laboratory tests conducted in Part I also showed that the asphalt treated base
  
  mixtures have made significant improvements over unbound granular base materials in terms of stiffness and permanent
  
  deformation resistance. In addition, the MEPDG analysis showed asphalt treated mixtures can be used to extend the service
  
  life and/or reduce the design thickness of a pavement structure. The results of Part II of this study demonstrated that the
  
  asphalt treated mixtures can be successively produced in conventional HMA plants and constructed in the field. In addition,
  
  the in-situ test results showed that asphalt treated mixtures exhibited similar moduli to those of conventional HMA base course
  
  mixtures.
  
  
• Format:
  PDF
• Funding:
  LTRC Project Number: 04-4B;State Project Number: 736-99-1449
• Collection(s):
  US Transportation Collection
• Main Document Checksum:
  urn:sha-512:e4af0502e986a63b535d957c447e45c0715131ccf03931366092c3d7719534818030207c98276b3757db78a5a636089b8aa0e0f1940b3590ad74a15cfad4b79b
• Download URL:
  https://rosap.ntl.bts.gov/view/dot/26818/dot_26818_DS1.pdf
• File Type:
  [PDF - 965.80 KB ]