| 摘要 |
PROBLEM TO BE SOLVED: To provide an electric nondestructive measuring method of the crack depth of a concrete structure from the concrete surface. SOLUTION: This method comprises conductor powder injected into the crack of the concrete, an earth plate arranged on the concrete surface, and a network analyzer. An antenna is constituted from the conductor in the crack of the concrete and the earth plate, and input impedance is measured, to thereby determine the crack depth of the concrete. Hereby, the crack depth of the concrete can be determined precisely and easily. The device used for the measuring method is simple, small and portable. In addition, the method also has a function for repairing the crack by injecting a mixture of the conductor powder, an epoxy-based resin or the like into the crack.
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