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This paper presents the results of the accelerated test and the exposure test on penetration and diffusion property of chloride ion in concrete from literature survey. At the results of arrangement and examination for literature data, the characteristic values of diffusion equation showed the tendency to change with passing period, and converge to the constant value at the exposure test. At the accelerated test, immersing in salt water showed that characteristic values change similar with exposure test. At alternating immersion, however, characteristic values were constant from initial stage of test. Moreover, influences of water cement ration on characteristic values were little in each test method.

EXAMINATION ON PENETRATION AND DIFFUSION OF CHLORIDE ION INTO CONCRETE IN ACCELERATED TEST AND EXPOSURE TEST