| 摘要 |
PROBLEM TO BE SOLVED: To sense a pH change of concrete on real-time basis for detecting continuously a neutralization progressing condition for the concrete, without destroying a concrete structural body to obtain a sample. SOLUTION: In this neutralization detecting method, a measuring electrode 5 and a reference electrode 6 are embedded into a concrete structural body 1 of a measuring object, and a potential difference between the electrode 5 and the electrode 6 interposed with concrete of the structural body 1 is measured to detect neutralization for the concrete structure 1. The measuring electrode 5 is composed of a metal element, belonging to the fifth group in the periodic table or an alloy using at least one kind of the metal element as a substrate.
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