METHOD FOR INSPECTING CRACK OF CONCRETE STRUCTURE

摘要

PROBLEM TO BE SOLVED: To inspect fine cracks hard to be visually observed, by a simple method without using any special materials and simultaneously inspect an inspection result visually at an installation site.SOLUTION: A crack inspection method includes: an injection step of injecting a diagnostic agent consisting of a nonvolatile low-viscosity liquid, from the surface of a concrete structure into the concrete structure; a sampling step of cylindrically boring the part into which the diagnostic agent has been injected and sampling a concrete core; a bore-inside observation step of drying a wall surface of a sampling hole of the concrete structure from which the concrete core has been bored and observing cracks in the sampling hole that become visible due to a wetted color of the diagnostic agent; and a segment observation step of drying concrete segments formed by cutting the concrete core at prescribed intervals into cross sections and observing cracks of the concrete segments that become visible due to the wetted color of the diagnostic agent.