A Micromechanics-Based Approach for Determining Presence and Amount of Recycled Asphalt Pavement Material in Asphalt Concrete (With Discussion)

The economical use of pavement milling in recent years has resulted in the availability of significant amounts of recycled asphalt pavement (RAP). The use of RAP in new asphalt concrete mixtures can result in cost savings for both aggregate and asphalt binder. When properly utilized in mix design and production, lower costs can be realized without a sacrifice in the serviceability of the pavement. However, cost savings may not be realized by the owner and there may be a loss in serviceability of the pavement when unauthorized use occurs. This study was conducted to modify and/or develop a test to determine the presence and amount of RAP in post-production mixtures as a practical quality assurance tool. A testing and analysis procedure was developed to identify the presence and amount of RAP in asphalt mixtures. The development of the procedure was carried out by testing of laboratory as well as plant mixtures with known RAP amounts. To validate the most promising method two sets of blind samples were evaluated. An extensive testing of RAP materials from various sources was also carried out to determine the effect of RAP variability on newly developed procedures. From a literature review it was identified that asphalt binder properties change most dramatically with aging and therefore a procedure based on testing of asphalt binders was developed. An extensive procedure coupled with an analysis technique based on micromechanics was developed for determining amount of RAP in the asphalt concrete.

• Availability:
  • Find a library where document is available. Order URL: http://worldcat.org/oclc/70700638
• Authors:
  • Buttlar, William G
  • Dave, Eshan V
• Discussers:
  • Masad, Eyad A
  • Huang, Baoshan
  • Rowe, Geoffrey
  • Page, Gale
  • Dunning, Michael
  • D'Angelo, John
• Conference:
  • 2005 Journal of the Association of Asphalt Paving Technologists: From the Proceedings of the Technical Sessions
  • Location: Long Beach CA, United States
  • Date: 2005-3-7 to 2005-3-9
• Publication Date: 2005

Language

• English

Media Info

• Media Type: Print
• Features: Appendices; CD-ROM; Figures; References; Tables;
• Pagination: pp 829-884
• Serial:
  • Journal of the Association of Asphalt Paving Technologists
  • Volume: 74
  • Publisher: Association of Asphalt Paving Technologists (AAPT)
  • ISSN: 0270-2932
  • Serial URL: https://www.asphalttechnology.org/site_page.cfm?pk_association_webpage_menu=9169&pk_association_webpage=19109

Subject/Index Terms

• TRT Terms: Aggregates; Aging (Materials); Asphalt concrete; Asphalt mixtures; Asphalt pavements; Bituminous binders; Bituminous mixtures; Laboratory tests; Literature reviews; Milling; Mix design; Pavements; Production; Quality assurance; Recycled materials; Serviceability; Testing; Variables
• Uncontrolled Terms: Cost savings; Micromechanics
• Subject Areas: Design; Geotechnology; Highways; Materials; Pavements; I22: Design of Pavements, Railways and Guideways; I23: Properties of Road Surfaces; I31: Bituminous Binders and Materials;

Filing Info

• Accession Number: 01020733
• Record Type: Publication
• Files: TRIS
• Created Date: Mar 27 2006 11:07AM