Full Implementation of Multiple Stress Creep Recovery (MSCR): A Look at Three Northeast U.S. States

This article reports on the implementation of a new performance-graded (PG) binder specification (AASHTO M332) that uses the Multiple Stress Creep Recovery (MSCR) test (AASHTO T-350). The author notes that this specification offers a better way to characterize asphalt binders, but its implementation across the country has been slow. The author interviewed representatives from three of the first states in the U.S. to fully implement MSCR for all binder grades: New York, Connecticut, and Maryland. Topics covered in the interviews included the decision-making process before implementation of MSCR; the action steps taken for implementation; the grades that were originally and finally specified to be covered; the kinds of issues that were encountered during or after implementation; handling recycled grades, such as softer binders required with higher RAP mixes; and the types of comparison testing done after implementation of MSCR. A map of the United States charts which states have full implementation of MSCR, versus those with partial and/or planned implementations.

Language

  • English

Media Info

  • Media Type: Print
  • Features: Figures; Photos;
  • Pagination: pp 15-18
  • Serial:
    • Asphalt
    • Volume: 33
    • Issue Number: 1
    • Publisher: Asphalt Institute
    • ISSN: 0004-4954

Subject/Index Terms

Filing Info

  • Accession Number: 01675867
  • Record Type: Publication
  • Files: TRIS
  • Created Date: Jul 8 2018 6:45AM