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This study evaluated durability through measurement of substituted test piece's pH degree and experiments of carbonation. Comparing and evaluating cared test piece's pH degrees which we got before the carbonation and after the carbonation. After evaluating carbonation depth through carbonation, evaluating carbonation properties by fly-ash replacement ratio pH degree was decreased by cement replacement ratio of fly-ash. And in the case of substitution of the same amount of fly-ash. Fine aggregate replacement ratio was increased. When the test piece. Which had been cared in high temperature, was promoted to carbonation. Among the test piece which was replaced with fly-ash 40%, the test piece which has high rate of fine aggregate proved opposition of carbonation.
Through the test, I summarized that the test piece cared in high temperature was mostly effected by compress strength the test piece cared in low temperature was mostly effected by pH degree.

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UCI(KEPA) : I410-ECN-0101-2009-540-013501228