3258 Shear Adhesion Behavior of Concrete-epoxy-steel and Concrete-epoxy-CFRP Interfaces :

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Experiments were performed to study the shear adhesion behavior of concrete-epoxy-steel/CFRP interfaces. The average shear strength of interface is found between 1.1 to 3.3 MPa. The thin layer of adhesive results the most effective bonding. The average shear stress at failure decreases with plate thickness for steel plate bonding. The longer bond length decrcases the average shear strength but increases the ultimate shearing force. Shear strength of the interface also increases with concrete strength. The major failure mode is debonding of concrete-epoxy joint in steel plate bonding whereas for CFRP bonded specimens, it is shearing-off of concrete below CFRP layer.

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