Use of High-Volume Reclaimed Asphalt Pavement (RAP) for Asphalt Pavement Rehabilitation Due to Increased Highway Truck Traffic from Freight Transportation

A recent rise in asphalt binder prices has led state agencies and contractors to use higher quantities of Reclaimed Asphalt Pavement (RAP). Besides being economic, sustainable, and environmentally friendly, RAP can be replaced for a portion of aggregates in Hot Mix Asphalt (HMA) where quality aggregates are scarce. In this project, the effect of increasing RAP percentage and using fractionated RAP (FRAP) in HMA mixture on moisture resistance, rutting, and fatigue cracking were evaluated. Mixtures with five different RAP and FRAP contents (20%, 30%, and 40% RAP, and 30% and 40% FRAP) were studied. The Hamburg Wheel Tracking Device (HWTD) Test (TEX-242-F), Kansas Standard Test Method KT-56 or modified Lottman Test, and Dynamic Modulus Test (AASHTO TP: 62-03) were used to predict moisture damage, rutting potential and fatigue cracking resistance of the mixes. HMA specimens were prepared based on Superpave HMA mix design criteria for 12.5 mm (1/2 inch) Nominal Maximum Aggregate Size (NMAS) and compacted using the Superpave gyratory compactor. Results of these tests showed that although mixture performance in the laboratory tests declined as the percentage of RAP increased in the mix, even mixtures with 40% RAP passed the minimum requirements in commonly used tests. When RAP is compared with FRAP, FRAP does not seem to improve performance of the HMA mixtures. This was largely confirmed by the statistical analysis. Mixtures with RAP performed more or less the same as or better than the mixtures with FRAP.

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• Summary URL:
  http://matc.unl.edu/research/research_projects.php?researchID=319
• Record URL:
  https://rosap.ntl.bts.gov/view/dot/25414
• Supplemental Notes:
  • This document is disseminated under the sponsorship of the U.S. Department of Transportation, University Transportation Centers Program.
• Corporate Authors:

  Mid-America Transportation Center

  University of Nebraska-Lincoln
  2200 Vine Street, PO Box 830851
  Lincoln, NE  United States  68583-0851

  Research and Innovative Technology Administration

  1200 New Jersey Avenue, SE
  Washington, DC  United States  20590

  Federal Highway Administration

  1200 New Jersey Avenue, SE
  Washington, DC  United States  20590
• Authors:
  • Hossain, Mustaque
  • Haritha, Musty
  • Sabahfer, Nassim
• Publication Date: 2012-6

Language

• English

Media Info

• Media Type: Digital/other
• Edition: Final Report
• Features: Figures; Photos; References; Tables;
• Pagination: 71p

Subject/Index Terms

• TRT Terms: Fatigue cracking; Hot mix asphalt; Laboratory tests; Mix design; Pavement maintenance; Reclaimed asphalt pavements; Rutting; Superpave
• Uncontrolled Terms: Moisture resistance
• Subject Areas: Highways; Materials; Pavements; I31: Bituminous Binders and Materials;

Filing Info

• Accession Number: 01469918
• Record Type: Publication
• Report/Paper Numbers: 25-1121-0001-452, MATC-KSU: 452
• Files: UTC, NTL, TRIS, ATRI, USDOT
• Created Date: Jan 17 2013 1:56PM