A Process to Identify and Verify the Binder Grades of HMA Mixtures Containing Asphalt RAP Materials

This paper presents a laboratory study conducted to identify the virgin binder grade required to blend with extracted RAP binder based on rheological properties of the binders. A total of twelve different combinations were studied to produce two target binder grades of PG64-22 and PG64-28 from three different RAP sources at two RAP contents. It was determined that five virgin binder grades are needed to be blended with RAP binders to achieve the properties of the target binder grades. The final grades of the blended binders were verified by actual blending the extracted RAP and virgin binders at different proportions to ensure that they met the target binder properties. Furthermore, validation of the blending process was conducted by extracting the final blended binder from asphalt mixtures that includes RAP and testing for the rheological properties. The results of this study were encouraging and found even better than target binder in some cases.

• Record URL:
  https://doi.org/10.1061/40971(310)135
• Availability:
  • Find a library where document is available. Order URL: http://worldcat.org/isbn/9780784409718
• Supplemental Notes:
  • © 2008 American Society of Civil Engineers.
• Corporate Authors:

  American Society of Civil Engineers

  1801 Alexander Bell Drive
  Reston, VA  United States  20191-4400
• Authors:
  • Shrestha, Raghubar
  • Sebaaly, Peter E
• Conference:
  • GeoCongress 2008
  • Location: New Orleans Louisiana, United States
  • Date: 2008-3-9 to 2008-3-12
• Publication Date: 2008

Language

• English

Media Info

• Media Type: Web
• Features: References;
• Pagination: pp 1081-1088
• Monograph Title: GeoCongress 2008: Geosustainability and Geohazard Mitigation

Subject/Index Terms

• TRT Terms: Asphalt pavements; Binders; Hot mix asphalt; Recycled materials; Rheological properties
• Subject Areas: Highways; Materials; Pavements;

Filing Info

• Accession Number: 01928572
• Record Type: Publication
• ISBN: 9780784409718
• Files: TRIS, ASCE
• Created Date: Aug 23 2024 4:53PM