FraMCoS 6 2007 Catania, Italy

Fracture behavior of the concrete cover due to rebar corrosion

Evaluation of the performance recovery of reinforced concrete (RC) members by repair is an important issue in recent years. In this paper, first, fracture behavior of concrete RC cover with cracks due to the rebar corrosion was analyzed by using…

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Year 2007
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Abstract

Evaluation of the performance recovery of reinforced concrete (RC) members by repair is an important issue in recent years. In this paper, first, fracture behavior of concrete RC cover with cracks due to the rebar corrosion was analyzed by using fracture mechanics approach and the diagrams to evaluating the degree of rebar corrosion by a concrete surface crack width and rebar diameter were proposed. Next, effects of the repairing material properties of polymer cement mortar (PCM) on fracture properties of RC cover were evaluated by a bending test of center notched small cubic RC specimen. Strength recovery by repairing is sat- isfactory regardless of the rebar corrosion. Toughness is also significantly improved by the repairing. The de- gree of improvement to toughness becomes greater as the volumetric content of fibers of PCM.