Transactions of Nanjing University of Aeronautics & Astronautics
Behavior of Corrosion-Repaired Concrete Beams Reinforced by Epoxy Mortar
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Abstract:
The performance of concrete beams repaired with epoxy mortar was investigated by constructing twelve beam specimens. All the beam specimens were subjected to a constant current for accelerated corrosion. Six specimens were corroded without subsequent reparation as a control group, and the other six beam specimens were corroded and repaired utilizing epoxy mortar. All specimens were tested to failure. During test process, we focused on the failure pattern of beam specimens, structural cracks, mid-deflections, bearing capacity, and probed into the influence of corrosion degree and repair of epoxy mortar on the performance of beam specimens. It was observed that corrosion-repaired beams in the loading test were in a bending failure pattern. It is obvious that cracking loads and bending stiffness of repaired beams and corrosion-repaired beams were larger than those of unrepaired beams and secondly-corroded beams. When the mass loss of main steel bars was smaller than 10%, the bearing capacity of the repaired beams was similar to that of the unrepaired beams. When the mass loss of main steel bars was larger than 10%, the bearing capacity of the repaired beams increased significantly compared with that of the unrepaired beams.
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