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Mid-America Transportation Center

Evaluation of Bonding Agent Application on Concrete Patch Performance

Final Report
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Researchers

  • Principal Investigator: Kyle Riding (riding@ksu.com 785-532-1578)
  • Project Status
    Complete
    About this Project
    Brief Project Description & Background
    Concrete patching is a commonly used concrete infrastructure preservation and repair technique, used frequently in the U.S. Midwest to repair areas of concrete freezing and thawing joint distress. The repair patches usually fail first at the interface between old and new concrete. Bonding agents are used to enhance the bond at this interface. This project will establish the sensitivity of bonding agents performance to environmental and construction practices, and provide recommendations for achieving optimum bond.
    Research Objective
    The research objective is to quantify the sensitivity of bonding agents to environmental factors and construction practices. This project will measure this sensitivity through both laboratory and field concrete bond strength experiments.
    Potential Benefits
    It is expected that the laboratory and field testing will quantify the sensitivity of concrete patch bonding agents to construction conditions and temperature cycling. A guide for selection and use of bonding agents will be made. This information will allow engineers and specifiers to select robust bonding agents that are less likely to experience problems in the field.
    Abstract
    Concrete patching is a commonly used infrastructure preservation and repair technique. Patches are used frequently in the U.S. Midwest to repair areas of concrete freezing and thawing joint distress. The repair patches usually fail first at the interface between old and new concrete. Bonding agents such as cementitious grout or epoxy are often specified to enhance the bond. There is concern that these bonding agents may be more sensitive to environmental and construction practices than previously thought and that these bonding agents may actually give poor performance in the field. This project will establish the sensitivity of bonding agent performance to environmental and construction practices, and provides recommendations for achieving optimum performance. This will be accomplished by testing the repair bond to concrete for cementitious and epoxy bonding agents subject to different drying times. The repair will be also cycled through five temperature cycles before testing the bond using the guillotine test. Field trials will also be used to confirm the material sensitivity determined through the laboratory testing.
    Project Amount
    $ 59,999