The present invention relates to a method of estimating the carbonation depth of a concrete structure using neuropurge theory, and more particularly, water binder ratio, concrete compressive strength, crack width, concrete surface chloride ion concentration, which are factors of compound degradation by using neuropurge theory, The present invention relates to a method for estimating the carbonation depth of concrete structures using neurofuzzy theory, which allows users to quickly and accurately estimate the carbonation depth by reflecting the influence of chloride ion diffusion coefficient, surface aging condition and time. A preferred embodiment of the present invention is (a) purging the input variables by using the water binding material ratio of the concrete structure, concrete compressive strength, crack width, concrete surface chloride ion concentration, chloride ion diffusion coefficient, surface aging condition, and time as input variables. Anger; (b) generating fuzzy rules for the number of all possible cases based on each input variable fuzzy in step (a); (c) calculating and normalizing the degree of membership of the fuzzy rule; (d) outputting a normalized fuzzy rule; (e) estimating the carbonation depth of the concrete structure by de-fuzzying the normalized fuzzy rule.
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