| 摘要 |
PROBLEM TO BE SOLVED: To provide a reinforcing fiber for concrete having excellent kneading ability and conveyability by pressure simply by partially fusing fine denier high strength and high modulus multifilament which was formerly said to be difficult to knead with concrete containing coarse aggregate, and to provide a high performance fiber-reinforced concrete product having excellent durability. SOLUTION: This reinforcing fiber for concrete is obtained by using as the core yarn a high strength and high modulus multifilament having a single fiber diameter of 5 to 50μm, tensile strength of 10 cN/dtex or higher and an elastic modulus of 400 cN/dtex or higher which was difficult to knead to make fiber- reinforced concrete product containing coarse aggregate because of lacking fluidity, covering the core fiber with an adhesive fiber as the winding yarn by 30 to 900 T/m resulting in total denier of 100 to 6,000 dtex, and partially fusing to improve kneading ability and workability. The high performance fiber-reinforced concrete product uses the reinforcing fiber to have excellent durability.
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