ELECTROCHEMICAL TREATMENT MANAGEMENT METHOD: Fid-Bau Portal

ELECTROCHEMICAL TREATMENT MANAGEMENT METHOD

SHICHIZAWA AKIRA

To provide an electrochemical treatment management method capable of suppressing acceleration of ASR even in a concrete structure with a bar arrangement amount of steel bars (steel materials) being different from sites to sites.SOLUTION: In an electrochemical treatment management method, a direct current is conducted between an external electrode 20 and an internal electrode 30, where an electrode assembled with an anode material 21 and an electrolyte solution holding material 22 which holds an electrolyte solution and installed at a front side of concrete 10 is employed as the external electrode and a steel bar buried in an inner side of the concrete 10 is employed as the internal electrode. The method includes the steps of: sampling a part of concrete between the external electrode and the internal electrode as a sample right before energization, during energization, and right after energization, and measuring a total alkali content (R2O amount) and pH of the sample to control a total alkali content (R2O amount) in concrete in the vicinity of a steel bar (internal electrode) to be 30 kg/m3 or under; and controlling pH of concrete in the vicinity of the steel bar (internal electrode) to be 10 or over and 13 or under.SELECTED DRAWING: Figure 1

【課題】鉄筋（鋼材）の配筋量が部位によって異なるコンクリート構造体であっても、ＡＳＲの促進を抑制することが可能な電気化学的処理管理方法を提供する。【解決手段】陽極材２１と電解質溶液を保持した電解質溶液保持材２２とを備え、コンクリート１０表面側に設置した電極を外部電極２０とし、コンクリート１０内部側に埋設されている鉄筋を内部電極３０とし、外部電極と内部電極との間に直流電流を通電させる方法であって、通電の直前、通電中、通電直後のそれぞれにおいて、外部電極と内部電極との間のコンクリートの一部を試料としてサンプリングし、試料の総アルカリ量（Ｒ２Ｏ量）及びｐＨを測定し、鉄筋（内部電極）近傍のコンクリートの総アルカリ量（Ｒ２Ｏ量）を３０ｋｇ／ｍ３以下に管理する工程と、鉄筋（内部電極）近傍のコンクリートのｐＨを１０以上１３以下に管理する工程とを含む、電気化学的処理管理方法。【選択図】図１

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