Development of a Standard Test Method for Characterization of Asphalt Modifiers and Aging-Related Degradation Using an Extensional Rheometer

This study has been initiated to (a) Characterize modified asphalt binders in relation to their aging-related degradation; (b) develop a new standard and specification to supplement the knowledge gap in the performance grade (PG) system for modified asphalt binders. In the proposed study, an extensional rheometer fixture will be used in a DSR platform to perform a suite of tests. Elongation tests and fracture tests will be performed using the extensional rheometer varying sample geometry, temperature, and strain rate. To replace ductility test (American Association of State Highway and Transportation Officials [AASHTO] T51), final strain in elongation test will be analyzed along with other parameters. Second force peak of force ductility test (AASHTO T300) will be compared to second force peak in elongation test. A novel and direct low temperature cracking susceptibility test will be developed by analyzing fracture strength and fracture energy parameters in fracture test using extensional rheometer. Extensional stress relaxation modulus and strain hardening will be investigated to determine the influence of polymer microstructures such as linear and radial styrene-butadiene-styrene (SBS). The proposed study will also investigate and quantify (a) the degradation of modifiers with aging, and (b) how polymers/modifiers influence aging susceptibility. A standard test method and corresponding specifications will be developed for immediate implementation.

• Supplemental Notes:
  • 17BLSU01

Language

• English

Project

• Status: Completed
• Funding: $108000
• Contract Numbers:

  69A3551747106

• Sponsor Organizations:

  Office of the Assistant Secretary for Research and Technology

  University Transportation Centers Program
  Department of Transportation
  Washington, DC  United States  20590
• Managing Organizations:

  Office of the Assistant Secretary for Research and Technology

  University Transportation Centers Program
  Department of Transportation
  Washington, DC  United States  20590

  Transportation Consortium of South-Central States (Tran-SET)

  Louisiana State University
  Baton Rouge, LA  United States  70803
• Project Managers:

  Hassan, Marwa

• Performing Organizations:

  Louisiana Tech University, Ruston

  Ruston, LA  United States  71272

  Louisiana Transportation Research Center

  4101 Gourrier Avenue
  Baton Rouge, LA  United States  70808
• Principal Investigators:

  Wasiuddin, Nazimuddin

• Start Date: 20170508
• Expected Completion Date: 20181108
• Actual Completion Date: 20181108
• USDOT Program: University Transportation Centers Program

Subject/Index Terms

• TRT Terms: Asphalt additives; Asphalt cement; Cracking; Degradation failures; Polymers; Rheometers; Specifications; Styrene butadiene styrene
• Subject Areas: Highways; Materials; Pavements;

Filing Info

• Accession Number: 01635011
• Record Type: Research project
• Source Agency: Transportation Consortium of South-Central States (Tran-SET)
• Contract Numbers: 69A3551747106
• Files: UTC, RIP
• Created Date: May 21 2017 10:33AM