Dynamic Modulus Performance of IDOT Mixtures

The dynamic modulus (E*) of hot mix asphalt (HMA) is the currently preferred structural characterization test for use in structural design. This value has been selected for inclusion in the Mechanistic Empirical Pavement Design Guide (MEPDG). With the introduction of Superpave mix designs, the structural properties of mixtures have changed in recent years, and an examination of current stiffness values is required as the Extended Life Hot Mix Asphalt Pavement (ELHMAP) design concepts require stiffness for several different HMA layers in the structure. The use of pre-Superpave modulus values could be inappropriate. Twenty mixtures representing surface and binder mixtures were sampled from the field. These mixtures were selected to cover the spectrum of mixtures and binders and mix designs being used throughout the state. Gyratory samples were compacted to 7 and 4 percent air voids and then prepared for E* testing. Three replicate samples were prepared for each mixture. Testing was conducted at three temperatures (-4 o, 10 o, and 20o C) and frequencies from 0.01 to 10 Hz. Five additional mixtures were added to the testing program. These mixtures were used to construct the ELHMAP sections to be used for response and fatigue testing under full scale loading. The E* data shows that current Illinois Department of Transportation (IDOT) mixtures have excellent modulus values which may be higher than the previously used values.

• Record URL:
  • http://www.ict.uiuc.edu/Publications/report%20files/FHWA-ICT-07-008.pdf
• 
• Availability:
  • Find a library where document is available. Order URL: http://worldcat.org/issn/01979191
• Corporate Authors:

  University of Illinois, Urbana-Champaign

  Department of Civil and Environmental Engineering
  205 North Mathews Avenue
  Urbana, IL  United States  61801-2352

  Federal Highway Administration

  1200 New Jersey Avenue, SE
  Washington, DC  United States  20590
• Authors:
  • Carpenter, Samuel H
• Publication Date: 2007-12

Language

• English

Media Info

• Media Type: Web
• Edition: Project Report
• Features: Appendices; Figures; Photos; Tables;
• Pagination: 97p
• Serial:
  • Civil Engineering Studies, Illinois Center for Transportation Series
  • Issue Number: 07-008
  • Publisher: University of Illinois, Urbana-Champaign
  • ISSN: 0197-9191

Subject/Index Terms

• TRT Terms: Asphalt mixtures; Dynamic modulus of elasticity; Hot mix asphalt; Mix design; Pavement design; Service life; Stiffness; Superpave
• Identifier Terms: Mechanistic-Empirical Pavement Design Guide
• Geographic Terms: Illinois
• Subject Areas: Design; Highways; Materials; Pavements; I23: Properties of Road Surfaces; I31: Bituminous Binders and Materials;

Filing Info

• Accession Number: 01108659
• Record Type: Publication
• Report/Paper Numbers: FHWA-ICT-07-008
• Contract Numbers: ICT-R39
• Files: TRIS, USDOT
• Created Date: Aug 20 2008 9:06AM