STEEL CORROSION IN CONCRETE USING ELECTROLYTIC ACCELERATION
Electrolytic technique can be used as a quicker manner to induce corrosion of steel in the laboratory. Tests were conducted to evaluate the error range of the results of steel corrosion using electrolytic corrosion technique applied to concrete of different dimensions, and on steel bars embedded in concrete of different curing ages to evaluate the effect of concrete strength on steel corrosion. The corrosion levels were calculated theoretically before the beginning of the tests based on Faradays law, and measured as mass loss of the steel after the tests. It was found that the average absolute error between the two types of corrosion levels was only 6.6％. For the small concrete cover, the measured corrosion level was smaller than the theoretically calculated when the corrosion level was low, but greater when the corrosion level was increased to around 10％. The dimension of the larger concrete covers showed no significant influence on the relationship between the two types of corrosion levels. During the beginning of the corrosion electrical resistance increased rapidly to its maximum value, but decreased drastically thereafter until it decreased slowly and stopped decreasing around its minimum value. It was demonstrated that corrosion level generally tended to decrease within the concrete strength of 23～35MPa, with an exception when the strength value was 27～30MPa, where the corrosion level increased with concrete strength.
Concrete steel bar corrosion electrolytic corrosion technique electric resistance
C. Q. Fang S. J. Cheng
Department of Civil Engineering, Shanghai Jiaotong University, Shanghai, China
国际会议
上海
英文
929-938
2007-11-28（万方平台首次上网日期，不代表论文的发表时间）