Early-Age Fiber-Reinforced Concrete Properties for Overlays

This study aims to investigate the age-dependent changes in flexural and fracture properties of fiber-reinforced concrete (FRC) used in the design of thin overlay pavements. Four different types of steel or polypropylene macro-fibers with different dimensions and different fiber volume contents (0%, 0.5%, and 1.0%) were selected and investigated. No significant changes in compressive strength, free drying shrinkage, coefficient of thermal expansion, and modulus of rupture versus age were identified. Steel FRCs were observed to have a constant or increased residual strength as a function of age while different types or contents of polypropylene FRCs showed varied trends in residual strength versus age. Fracture energy for all FRCs was observed to increase versus age. The residual strength ratio for all FRCs decreased as a function of age, but with only two replicates per age and FRC type, and values were highly variable so no trends were statistically verified at this time. A standard test age, namely 28 days, is recommended due to the changing residual strength ratio parameter used in thin FRC overlay design.

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  • Supplemental Notes:
    • This document was sponsored by the U.S. Department of Transportation, University Transportation Centers Program.
  • Corporate Authors:

    Mountain-Plains Consortium

    North Dakota State University
    Fargo, ND  United States  58108

    Office of the Assistant Secretary for Research and Technology

    University Transportation Centers Program
    Department of Transportation
    Washington, DC  United States  20590

    Utah Department of Transportation

    Salt Lake City, UT  United States 

    University of Utah, Salt Lake City

    Department of Civil Engineering
    Salt Lake City, UT  United States  84112
  • Authors:
    • Kim, Min Ook
    • Bordelon, Amanda Christine
  • Publication Date: 2018-7


  • English

Media Info

  • Media Type: Digital/other
  • Features: Figures; Photos; References; Tables;
  • Pagination: 34p

Subject/Index Terms

Filing Info

  • Accession Number: 01678537
  • Record Type: Publication
  • Report/Paper Numbers: MPC 18-353
  • Created Date: Aug 27 2018 9:48AM