| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a nonwoven fabric sticking structure in a structure such as a steel or concrete structure and a technique of crack check method for the purpose of visually observing and managing crack generation and degradation state in the structure after construction. <P>SOLUTION: A surface 7a of a bridge concrete floor slab 7 is surface-treated and an epoxy resin based adhesive 9 is applied thereon. Then, nonwoven fabric 8 is stuck to the bridge concrete floor slab 7. When a crack is generated on the bridge concrete floor slab 7, fibers constituting the nonwoven fabric 8 are detached at an interface between the adhesive 9 and the nonwoven fabric 8, the nonwoven fabric 8 molded containing the adhesive 9 is detached at the boundary face of the bridge concrete floor slab 7, and the nonwoven fabric 8 impregnated with the adhesive 9 is colored (clouded) 8a. By the coloring (clouding) phenomenon 8a, the degradation advancing state and degradation degree of the bridge concrete floor slab 7 are visually observable. <P>COPYRIGHT: (C)2012,JPO&INPIT |
