The road bridge and high building a bridge and the net null road bridge and high building a bridge and it consists of the warp and the weft of the Kevlar which is superior in weather resistance

摘要

PPROBLEM TO BE SOLVED: To provide a net for preventing a concrete lump of a ceiling wall face or an inner side wall face of a concrete structure such as a road bridge, a viaduct, an overbridge and a tunnel from being peeled off by aged deterioration, enabling vaporization of water, and enabling the deteriorated state to be visually checked. PSOLUTION: The net 1 for preventing the dropping of the concrete lump is stuck to the ceiling wall face or the side wall face of the concrete structure such as the road bridge, the viaduct, the overbridge and the tunnel, and includes a sheet-shaped net 1a composed of coarse and minute lattice-shaped parts 4 and 5 composed of warp yarns 2 and weft yarns 3 of multifilaments and having meshes of water-permeable openings. The warp yarns 2 and the weft yarns 3 are synthetic fibers having weather resistance such as a polyamide, polyethylene, polypropylene or polyvinyl alcohol-based fiber, a carbon fiber and an aramid fiber. The warp yarn 2 is a multifilament composed of a plurality of filaments, and the weft yarn is a twisted yarn. PCOPYRIGHT: (C)2008,JPO&INPIT