Relationship of fatigue to the tensile stiffness of asphaltic concrete : final report on phase 1, laboratory investigation.
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Relationship of fatigue to the tensile stiffness of asphaltic concrete : final report on phase 1, laboratory investigation.

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  • English
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    • Creators:
      Maupin, G. W.
    • Corporate Creators:
      Virginia Highway Research Council
    • Subject/TRT Terms:
    • Publication/ Report Number:
      VHRC 70-R41
    • Resource Type:
      Tech Report
    • Geographical Coverage:
      Virginia
    • Edition:
      Final report on phase 1: laboratory investigation.
    • Corporate Publisher:
      Virginia Transportation Research Council (VTRC)
    • Abstract:
      The correlation between asphaltic concrete tensile stiffness and fatigue life was determined in the laboratory. Constant strain fatigue tests were utilized and indirect tensile tests were selected because of their simplicity and applicability. Four asphaltic concrete mixes of different stiffnesses were tested under constant strain fatigue and indirect tension. Each mix was fatigue tested at several strain levels in order that a strain fatigue life relationship could be developed. This enabled the correlation of tensile stiffness and fatigue life at any of the strain levels used in the tests. A correlation between tensile stiffness and fatigue life was plotted at a 150 x 10-6 in./in. strain level. The information gathered indicates that it may be possible to predict the fatigue susceptibility of a mixture with a simple indirect tension test. The fatigue life of a surface mixture was reduced by artificial aging and was altered by using asphalt cements of different hardnesses.
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