Accelerated test on the rate of corrosion of reinforcing bar in concrete containing chloride ion

Abstract

This paper reports the results of accelerated test (60°C and 80°C, moist condition) on the rate of corrosion of reinforcing bar in concrete which contains chloride ion. The factor of experiment are sodium chloride content (0∼1.0%/sand), water-cement ratio (50∼65%), and thickness of concrete cover (15∼40mm).It is concluded as follows, The corrosion loss of reinforcing bar in accelerated test increases in proportion to square root of exposure period. Rate of corrosion of reinforcing bar in concrete containing 0 and 0.1% sodium chloride in 80°C is larger than rate of corrosion in 60°C. However rate of corrosion of reinforcing bar in concrete containing 0.3 and 1.0% sodium chloride in 80°C is smaller than rate of corrosion in 60°C. The estimation equation of the rate of corrosion of sodium chloride content(0∼1.0%/sand) are proposed by thickness of concrete cover and water- cement ratio.