SYSTEM AND APPARATUS FOR DETECTING INJURY FROM SALT OF STEEL MATERIAL/CONCRETE STRUCTURE, AND STEEL MATERIAL/CONCRETE STRUCTURE

摘要

PROBLEM TO BE SOLVED: To provide a system for detecting the injury from salt of a steel material/concrete structure capable of easily detecting the injury from salt of a steel material in the steal material/concrete structure or the corrosive state of concrete due to neutralization for a short time in a wireless manner, the detector thereof and the steel material/concrete structure.

SOLUTION: A plurality of the detectors 7, which are operated by the energy supplied from a monitor 8 by a radio wave and detect the pH value of the circumference and a chloride ion concentration value to transmit the detection results to the monitor 8 as digital data, are embedded in post-cast concrete 3 for fixing an expansion/contraction device 4 to the joint part of a bridge girder 2 and the pH value and the chloride ion concentration value in the vicinity of the anchor bolt comprising steel of the expansion/contraction devices 4 embedded in the post-cast concrete 3 are detected wirelessly to detect the corrosive state of the anchor bolt due to injury from salt.

COPYRIGHT: (C)2005,JPO&NCIPI