Bond-Fatigue Behavior of Bonded Concrete Overlay

Bonded concrete overlays have a structural advantage over unbonded concrete overlays when the overlay and the existing pavement layer behave as a monolithic layer. Therefore, it is important to ensure suitable bond strength between the two layers. Many studies have specified the bond-strength criteria for the construction of bonded concrete overlays based on a monotonic load as pull off test. However, cyclic stress at the interface of bonded concrete overlay layer occurs by the repetition of traffic loading and environmental loading caused by daily temperature changes. In this study, a strategic test procedure is developed to investigate potential bond failures caused by cyclic loading, and a bond-fatigue equation for a bonded concrete overlay was suggested. The test results indicate that early distress in bonded concrete overlay may arise because of a bond failure if the bond stress at the interface exceeds 90% of the bond strength.

Language

  • English

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Filing Info

  • Accession Number: 01611066
  • Record Type: Publication
  • Files: TRIS
  • Created Date: Sep 2 2016 11:13AM