PROBLEM TO BE SOLVED: To provide a sensor or the like capable of easily and rapidly evaluating a neutralization environment of concrete.;SOLUTION: In the sensor for neutralization environment evaluation of concrete, a hardened body of a cement composition that is produced by molding, into a tabular or block shape, a cement composition 11 having a water/cement ratio (mass ratio) of 35-200% and a water/powder ratio (mass ratio) of 25-70% is used as an infiltration component 11. Furthermore, one surface of the infiltration component 11 is an exposure surface exposed to the atmospheric air, a neutralization detection member 12 for detecting the neutralization using an electrical characteristic is installed on the rear surface facing the exposure surface, and the surface other than the exposure surface is a blocked surface blocked from the atmospheric air by a blocking material 13.;COPYRIGHT: (C)2015,JPO&INPIT
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