Updated Testing Procedures for Long Life Heavy Duty Stabilized Bases

The Texas Department of Transportation (TxDOT) is in the process of evaluating new approaches and laboratory test methods for characterization of the fatigue performance of the cement treated base layers. The new approach is required to be all inclusive for statewide application and incorporation into the new Mechanistic Empirical Design Guide (TexME). Three-point bending beam fatigue test is currently used for the determination of the modulus of rupture of the cement-treated mixes. This test proved to be impractical for lightly-stabilized systems as the specimen tends to disintegrate during transportation to the test setup. Additionally, discrepancies associated with specimen preparation and non-uniform density distribution in large samples were found to be an added concern that greatly jeopardizes the accuracy of the performance prediction models. Therefore there is an urgent need for a simple and practical fatigue test that provides inputs to the TexME structural design program. This research project provides an alternative laboratory testing protocol for mechanistic characterization of the cement treated base layers to meet the need.

Language

  • English

Project

  • Status: Completed
  • Funding: $297000.00
  • Contract Numbers:

    0-6812

  • Sponsor Organizations:

    Texas Department of Transportation

    125 E. 11th Street
    Austin, TX  United States  78701-2483
  • Project Managers:

    Pete, Kevin

  • Performing Organizations:

    University of Texas, El Paso

    Center for Transportation Research
    El Paso, TX  United States  78712-1075
  • Principal Investigators:

    Ashtiani, Reza

  • Start Date: 20140425
  • Expected Completion Date: 0
  • Actual Completion Date: 20160331
  • Source Data: RiP Project 36804

Subject/Index Terms

Filing Info

  • Accession Number: 01568879
  • Record Type: Research project
  • Source Agency: Texas Department of Transportation
  • Contract Numbers: 0-6812
  • Files: RiP, STATEDOT
  • Created Date: Jun 30 2015 1:01AM