To prevent generation of a pinhole without being influenced by a crack of backing concrete by arranging a conductive insulating layer on the surface of a concrete structure, and spraying a super speed-curing resin on the outside.
A conductive insulating layer 2 is installed on the surface of a concrete structure 1 such as a heat accumulating tank through a metallic material, and a super speed-curing resin layer 3 is sprayed on or the applied to the outside. A heat insulating layer is installed on the surface of concrete, and a super speed-curing resin may be sprayed on the outside where the conductive insulating layer is installed through an adhesive. The conductive insulating layer 2 is formed of a film-like body such as woven fabric, nonwoven fabric and a net-like body by performing conductive work or a film and foil by performing conductive working. At inspection time, the conductive insulating layer 2 is earthed, and an electrode is approached from the outside of the super speed-curing resin layer 3, or an eddy current type film thickness meter is approached to measure a position of a pinhole and film pressure. Thus, a reliable waterproof layer can be formed without deteriorating executability even in a narrow place.
SUZUKI TOSHIYUKI
DYFLEX CORP
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