Analysis of load-induced strains in a hot mix asphalt perpetual pavement : final report, April 2009.
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Analysis of load-induced strains in a hot mix asphalt perpetual pavement : final report, April 2009.

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English
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Details:

  • Creators:
    Crovetti, James A.
  • Corporate Creators:
    Marquette University. Transportation Research Center
  • Subject/TRT Terms:
  • Publication/ Report Number:
    FEP 01-09
  • Resource Type:
    Tech Report
  • Geographical Coverage:
    Wisconsin
  • Edition:
    Final report; June 2005-Apr. 2009.
  • Corporate Publisher:
    Wisconsin. Dept. of Transportation. Bureau of Technical Services
  • Abstract:
    This report presents the findings of a research study conducted to investigate the structural performance of a 275 mm hot

    mix asphalt perpetual pavement constructed as part of the WIM bypass lane at the Kenosha Safety & Weigh Station

    Facility. Two separate test sections were constructed using variable binder types and in-place air voids. Asphalt strain

    sensors were fabricated at Marquette University and installed during the construction of the HMA pavement. Sensors were

    positioned within the outer wheel path and located at the bottom of the 275 mm HMA pavement and at the interface

    between the lower layers at a depth of approximately 175mm from the surface. Strain sensors were oriented in both the

    transverse and longitudinal directions. A total of 16 strain sensors were installed during construction. Of these, only three

    survived to provide strain data under traffic loadings.

    Deflection data obtained from FWD testing was used as comparative measures to strain measurements obtained during

    testing and to estimate the combined dynamic HMA layer moduli at the time of testing and to develop monthly trends of

    dynamic HMA layer moduli as a function of the expected mean monthly mid-depth pavement temperature. A comparative

    analysis of measured strains to those predicted from FWD measurements provided generally good agreement. A

    mechanistic appraisal of the constructed test sections was completed using the outputs of the EVERSTRESS pavement

    analysis program. This analysis computed the expected monthly damage induced by the application of 521,000 monthly

    ESAL loadings. The results of the mechanistic appraisal indicate the expected service life to 50% bottom-up fatigue

    cracking is in excess of 90 years for sections with air voids of 4% within the lower layers. If the air void content increases

    to 5% - 6% in the lower layers, the expected fatigue life may be significantly reduced to between 13 – 32 years.

  • Format:
    PDF
  • Funding:
    FEP-02-02
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