Development of a Simple Test to Determine the Low Temperature Strength of Asphalt Mixtures

This project will develop and demonstrate a bending strength test on thin asphalt mixture and binder beams to evaluate the low temperature properties of asphalt mixtures and binders. Work in Stage 1 will focus on developing a bending strength test method. Working with an instrument manufacturer (Cannon Instruments), the current Bending Beam Rheometer (BBR) equipment will be modified with a new proportional valve system and the heavier loading frame, and the software to run the new strength test will be refined. The compliance correction for heavier loads will be determined to refine the calibration verification procedure currently included in the BBR creep compliance procedure. The outcome of this stage will be a method detailing sample preparation and loading protocol. Work in Stage 2 will focus on testing and data analysis of the BBR strength results. First, the experimental data from the BBR strength testing of asphalt mixture and asphalt binders specimens will be analyzed and compared with strength data from direct and indirect tension tests using routine statistical tools to develop correlations and identify factors affecting the comparison. This will be followed by an evaluation of the effect of asphalt mixture specimen size by performing strength tests on three different sizes of beam specimens. Finally, direct tension tests will be performed on a limited number of mixture specimens to investigate any issues related to "tension" vs. "bending" strength results. The outcome of this phase will be a detailed step-by-step method to analyze and interpret data from BBR strength testing of thin beams of asphalt mixtures and binders. The final report will document all data and developments of the low temperature bending strength test along with an assessment of the technology for implementation.


  • English


  • Status: Completed
  • Contract Numbers:

    Project 20-30, IDEA

  • Sponsor Organizations:

    Federal Highway Administration

    1200 New Jersey Avenue, SE
    Washington, DC  United States  20590

    American Association of State Highway & Transportation Officials (AASHTO)

    444 North Capitol Street, NW, Suite 225
    Washington, DC  United States  20001

    National Cooperative Highway Research Program

    Transportation Research Board
    500 Fifth Street, NW
    Washington, DC  United States  20001
  • Project Managers:

    Jawed, Inam

  • Start Date: 20100727
  • Expected Completion Date: 0
  • Actual Completion Date: 0
  • Source Data: RiP Project 26913

Subject/Index Terms

Filing Info

  • Accession Number: 01547235
  • Record Type: Research project
  • Source Agency: National Cooperative Highway Research Program
  • Contract Numbers: Project 20-30, IDEA
  • Files: TRB, RiP
  • Created Date: Dec 4 2014 1:00AM