Rutting Strain Index (RSI) Parameter for Asphalt Balanced Mixture Design

This Technical Brief provides an overview of how to determine the Rutting Strain Index (RSI) parameter using the stress sweep rutting (SSR) test, the Asphalt Mixture Performance Tester (AMPT), and the FlexMAT™ for Rutting analysis tool. It also presents index threshold values for use in asphalt mixture design and construction.


  • English

Media Info

  • Media Type: Digital/other
  • Features: Appendices; Figures; Photos; References; Tables;
  • Pagination: 6p
  • Serial:
    • TechBrief
    • Publisher: Federal Highway Administration
  • Publication flags:

    Open Access (libre)

Subject/Index Terms

Filing Info

  • Accession Number: 01774783
  • Record Type: Publication
  • Report/Paper Numbers: FHWA-HRT-21-044
  • Contract Numbers: DTFH61-13-C-00025
  • Files: NTL, TRIS
  • Created Date: Jun 23 2021 2:35PM