Study on Durability of Structures Exposed to Marine Environment


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Title: Study on Durability of Structures Exposed to Marine Environment

Author(s): T. Oshiro, S. Tanikawa, and N. Goto

Publication: Special Publication

Volume: 128


Appears on pages(s): 433-448

Keywords: chlorides; corrosion; durability; marine atmospheres; nondestructive tests; reinforced concrete; reinforcing steels; General

Date: 11/1/1991

Corrosion of steel reinforcement in concrete is one of the major problems with respect to the durability of reinforced concrete structures. Chloride ions are considered to be the major causes of premature corrosion of steel reinforcements. A test building was constructed in 1984 and has been exposed to a marine environment under the subtropical weather of Okinawa, Japan, for 6 years. This paper presents the evaluation on this test building, where nondestructive testing has been emphasized. Using a currently developed corrosion diagnosis system, the electrochemical characteristics, such as corrosion potential, polarization resistance, and concrete resistance, are measured. These characteristics are used to evaluate corrosion of the reinforcements, and the significance of this research is to enable one to evaluate corrosion of the reinforcements more quantitatively.