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Strength of Concrete

Concrete Strength with Added Fibers

Description

Fiber-reinforced concrete is concrete that includes added fibers to improve strength and durability. It uses hydraulic cement with fine or coarse aggregates, plus separated, non-continuous fibers mixed through the material. These fibers can come from steel, glass, and polymers, as well as natural sources such as sisal and ce...

Transcript

纤维增强混凝土由水硬性水泥和细骨料或粗骨料制成,并掺入分散的、非连续的纤维。

这些纤维可以是天然的,如石棉,也可以是人造的,例如由玻璃、钢或聚丙烯等聚合物制成。

钢纤维主要用于增强混凝土的结构和非结构性性能。纤维长度范围为四分之三英寸至两英寸半。

纤维体积的比例对纤维增强混凝土进行分类。当纤维含量低于百分之一时,有助于防止混凝土发生收缩开裂。

纤维掺量在1%至2%之间时,可提高抗折强度、韧性和抗冲击性;而掺量超过2%时,则会因塑性变形引起应变硬化。

普通混凝土在达到极限抗弯强度时发生断裂,而纤维增强混凝土则表现出持续的承载能力,以及更高的延性和开裂后性能。

混凝土中的纤维特性包括长径比、形状、表面纹理和...