Validation of Loose Mix Aging Procedures for Cracking Resistance Evaluation in Balanced Mix Design (Phase IIA)

The overall project seeks to validate loose mix aging for cracking resistance evaluation of asphalt mixtures in balanced mix design (BMD). Phase I efforts included conducting a literature review, research gap analysis, and developing a Phase II work plan to address two major gaps associated with implementing loose mix aging in BMD. Phase II-A aims to establish the conversion of different loose mix aging procedures based on the kinetics model developed in NCHRP project 9-54. To that end, asphalt mixtures covering a wide range of mixture components will be tested with the Indirect Tensile Asphalt Cracking Test (IDEAL-CT) and Disc-shaped Compact Tension (DCT) Test to characterize their intermediate-temperature and low-temperature cracking resistance over various loose mix aging conditions. The results will be used to determine the equivalence of loose mix aging at 95°C versus 100-125°C and 135°C, which allows state highway agencies (SHAs) to use an accelerated, yet robust aging procedure to evaluate the cracking resistance of asphalt mixtures in BMD in cases where the 95°C aging procedure is considered impracticable because of the long aging duration required.

• Record URL:
  https://researchprojects.dot.state.mn.us/projectpages/pages/projectDetails.jsf?id=29890&type=CONTRACT&jftfdi=&jffi=projectDetails%3Fid%3D29890%26type%3DCONTRACT
• Supplemental Notes:
  • National Road Research Alliance Study Phase II: TPF-5(466)

Language

• English

Project

• Status: Active
• Funding: $300000
• Contract Numbers:

  1036333 WO#10

• Sponsor Organizations:

  National Road Research Alliance

  St. Paul, MN  United States  55155
• Managing Organizations:

  Minnesota Department of Transportation

  395 John Ireland Boulevard
  St Paul, MN  United States  55155
• Performing Organizations:

  Auburn University

  National Center for Asphalt Technology
  310 Sanford Hall
  Auburn, Alabama  United States  36849-5131
• Principal Investigators:

  Fan, Yin

• Start Date: 20240522
• Expected Completion Date: 20260930
• Actual Completion Date: 0

Subject/Index Terms

• TRT Terms: Aging (Materials); Asphalt additives; Asphalt mixtures; Cracking; Mix design; Temperature; Tension tests
• Subject Areas: Design; Highways; Maintenance and Preservation; Materials; Pavements;

Filing Info

• Accession Number: 01926761
• Record Type: Research project
• Source Agency: Minnesota Department of Transportation
• Contract Numbers: 1036333 WO#10
• Files: RIP, STATEDOT
• Created Date: Aug 9 2024 2:01PM