Relating Dynamic Shear Modulus (G*) of Performance Grade (PG) Asphalt Binders to Nanoindentation Stiffness (E)

Traditionally, asphalt binder is characterized by a dynamic shear rheometer, which applies a shear load on a bulk volume of liquid asphalt binder to determine shear modulus (G*). Recently, a nanoindentation test can characterize an asphalt binder film in the form of coating around roadway aggregates, which is more practical. In a nanoindentation test, a sharp tip is used to indent an asphalt film while residing on an aggregate surface to determine nanoindentation modulus (E). This study evaluates whether there is a relation between G* and E. For both tests, replicate samples were conditioned in three ways: unaging, rolling thin film oven aging, and pressure vessel aging. Results show that the E-value is approximately 2 to 6 times larger than the G*-value based on all samples/conditioning.

• Record URL:
  http://www.unr.edu/Documents/engineering/solaris/Tarefder%20Final%20Report_Solaris_E%20and%20G.pdf
• 
• Supplemental Notes:
  • This document was sponsored by the U.S. Department of Transportation, University Transportation Centers Program.
• Corporate Authors:

  University of New Mexico, Albuquerque

  Department of Civil Engineering
  Albuquerque, NM  United States  87131-0001

  SOLARIS University Transportation Center

  University of Nevada
  Reno, NV  United States 

  New Mexico Department of Transportation

  Sante Fe, NM  United States  87504-1149

  Office of the Assistant Secretary for Research and Technology

  University Transportation Centers Program
  Department of Transportation
  Washington, DC  United States  20590
• Authors:
  • Faisal, Hasan M
  • Mannan, Umme Amina
  • Tarefder, Rafiqul A
• Publication Date: 2015-9-31

Language

• English

Media Info

• Media Type: Digital/other
• Edition: Final Report
• Features: Figures; Photos; References; Tables;
• Pagination: 31p

Subject/Index Terms

• TRT Terms: Asphalt concrete; Bituminous binders; Laboratory tests; Pavement design; Shear modulus; Stiffness
• Uncontrolled Terms: Nanoindentation
• Subject Areas: Design; Highways; Pavements;

Filing Info

• Accession Number: 01614926
• Record Type: Publication
• Files: UTC, TRIS, ATRI, USDOT, STATEDOT
• Created Date: Oct 25 2016 2:05PM