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纤维增强混凝土(Fiber Reinforced Concrete,FRC),一般掺入混凝土内的纤维为钢纤维和有机纤维长30～50mm,直径约0.6mm,用量为体积比0.5%～2%。通常用于隧道工程的第二道衬砌和钢筋混凝土地面的加厚,还有的是掺少量纤维用于防止混凝土结构表面剥落等;为降低环境负荷,也已有利用再生纤维的技术方案。本文就1990年以来具有高性能化代表性的二种纤维增强水泥系复合材料作为重点,根据适用事例,对其材料的设计概念进行解说,并强调充分利用相关材料特性的重要性。
Fiber Reinforced Concrete (FRC) Generally, the fibers incorporated into concrete are steel fibers and organic fibers that are 30-50 mm in diameter and 0.6 mm in diameter, in an amount of 0.5-2% by volume. The thickening of the second lining and the reinforced concrete floor usually used for the tunneling project, and the addition of a small amount of fiber for preventing the concrete structure surface from peeling off, etc. There is also a technical scheme for utilizing the regenerated fiber in order to reduce the environmental load. In this paper, we focus on two types of fiber-reinforced composite materials with high performance represented since 1990, and explain the design concept of their materials according to the applicable cases, emphasizing the importance of making full use of the characteristics of related materials.