Performance Evaluation of HMA Consisting of Modified Asphalt Binder

To achieve Strategic Highway Research Program (SHRP) specified Performance Grade (PG) grades, refineries make use of modifiers to enhance the properties of base asphalt. Even though modified binders may meet PG specifications, some perform better than others. This can be attributed to binder/hot mix asphalt (HMA) tests inability in consistently identifying the problems with the binders especially if the modifier is added to the binder. Therefore, it is necessary to identify a binder/HMA test that can consistently predict performance. The research performed for SHRP has significantly increased the understanding of HMA mix behavior among national and international highway-related agencies, which has resulted in an increase in the number of mixes available for placement. The increase in mix types makes it difficult for designers to select the appropriate mix for a given application. Therefore, it is necessary to have a HMA selection guideline. To achieve the objectives of this study, a survey was conducted to identify commonly placed mix and modifier types and logic followed in selection of mixes. Based on survey results, three mixes (Type D, CMHB-C, and PFC) were selected. In addition, the four modifier types: SBS, SBR, TR, and Elvaloy were selected and evaluated. The evaluation results and recommendations are included in this report.

• Record URL:
  http://ntis.library.gatech.edu/handle/123456789/9312
• 
• Supplemental Notes:
  • Project title: Guidelines for Selecting Asphalt Mixtures and Evaluation of Polymer-Modified Mixes.
• Corporate Authors:

  University of Texas, El Paso

  Center for Transportation Infrastructure Systems
  500 W University Avenue
  El Paso, TX  United States  79968-0516

  Texas Department of Transportation

  Research and Technology Implementation Office, P.O. Box 5080
  Austin, TX  United States  78763-5080

  Federal Highway Administration

  1200 New Jersey Avenue, SE
  Washington, DC  United States  20590
• Authors:
  • Sugandh, Rajpal
  • Zea, Manuel
  • Tandon, Vivek
  • Smit, Andre
  • Prozzi, Jorge
• Publication Date: 2007-2

Language

• English

Media Info

• Media Type: Web
• Edition: Technical Report
• Features: Figures; Photos; References; Tables;
• Pagination: 122p

Subject/Index Terms

• TRT Terms: Bituminous binders; Hot mix asphalt; Performance tests
• Identifier Terms: Strategic Highway Research Program
• Uncontrolled Terms: Asphalt modifiers; Performance grades
• Subject Areas: Highways; Materials; I31: Bituminous Binders and Materials;

Filing Info

• Accession Number: 01047570
• Record Type: Publication
• Report/Paper Numbers: FHWA/TX-07/0-4824-2, Report 0-4824-2
• Contract Numbers: 0-4824
• Files: TRIS, ATRI, USDOT, STATEDOT
• Created Date: May 1 2007 3:17PM