Experimental Study on Deterioration and Repairing of a Marine Concrete Structure

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Title: Experimental Study on Deterioration and Repairing of a Marine Concrete Structure

Author(s): Y. Takagishi, H. Ichikawa, H. Tabuchi, and A. Moriwake

Publication: Special Publication

Volume: 109

Issue:

Appears on pages(s): 253-276

Keywords: bridge decks; concrete slabs; corrosion; deterioration; epoxy resins; evaluation; fatigue strength; marine atmospheres; polymer-cement concrete; repairs; Structural Research

Date: 8/1/1988

Abstract:
Load-carrying capacity and fatigue strength before and after repairing were investigated for a coastal structure in Tokyo Bay, which was subjected to serious damage by chloride for 15 years. Static and cyclic load tests together with investigation on effectiveness of repair were carried out on specimens taken from the site. It was found that the bearing and yielding capacities of deteriorated slab are 90 and 80 percent, respectively, of those of sound structure. These losses were mainly caused by 10 percent loss of reinforcement corrosion. The specimens repaired by material with high tensile strength suggested brittle failure in static load tests. It was also found that fatigue failure of deteriorated reinforcements was accelerated by pitting corrosion.