GLASS FIBER SHEET, PROTECTIVE COVERING METHOD FOR CONCRETE STRUCTURE, PROTECTIVE COVERING FILM FOR CONCRETE STRUCTURE, AND METHOD OF MANAGING FILM THICKNESS OF PROTECTIVE COVERING FILM FOR CONCRETE STRUCTURE

摘要

PROBLEM TO BE SOLVED: To provide a glass fiber sheet which allows easy management of the film thickness in a nondestructive way without impairing transparency of a covering film when used in a protective covering film for concrete structures and a method of managing the film thickness of a protective covering film for concrete structures which enables simple measurement and management of the film thickness of the protective covering film for concrete structures.SOLUTION: A glass fiber sheet 52 includes glass cloth and an adhesive layer, laminated, and is provided partially with a nonmagnetic metal film layer on the side where the glass cloth is in contact with the adhesive layer. A method of managing the film thickness of a protective covering film for concrete structures comprises measuring the film thickness of the protective covering film for concrete structures through the glass fiber sheet 52 adhered partially to a concrete structure 50 by using an eddy current type film thickness meter 55.