1408 既設鉄筋コンクリート鉄道高架橋の中性化による劣化の現況調査とその定量評価(構造物維持管理,SS2:メンテナンス,コストダウン,第18回交通・物流部門大会(TRANSLOG2009))

概要

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In this research, to establish the forecast technique of deterioration by the carbonation of reinforced concrete structures, the fixed quantity evaluation concerning the deterioration was done based on the detailed investigation of an existing structure which deterioration by the carbonation was actualized and it considered about the occurrence and the progress speed of deterioration by the carbonation. First of all, it was shown that the remainder of the carbonation 10mm as a limit value concerning the reinforcing steel corrosion is roughly appropriate from the relation between the incidence of the strangeness and the remainder of the carbonation obtained by the investigation. Moreover, the difference of the amount of the moisture supply by the member and the part influenced the reinforcing steel corrosion speed, and it was shown that it was an item that had to be considered when deterioration was forecast.
2009-12-02