钢纤维增强自密实混凝土综述

IF 3.6 3区 工程技术 Q1 CONSTRUCTION & BUILDING TECHNOLOGY
Jawad Ahmad, Zhiguang Zhou, Ahmed Farouk Deifalla
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引用次数: 0

摘要

自密实混凝土(SCC)在自身重量下流动而不被压实或振动,不需要外界的机械力来移动。但与普通混凝土一样,SCC具有脆性(张力弱),会在没有事先通知的情况下导致突然倒塌。钢纤维(SF)的加入提高了SCC的抗拉性能。各种研究都集中在通过添加SF来提高SCC的抗拉强度(TS)。然而,为了收集关于sf增强SCC的过去研究、当前研究进展和未来研究方向的信息,有必要对研究进行详细的回顾。本综述的主要方面是SCC的一般介绍,新鲜特性即坍落度流动,坍落度T50, L盒和V漏斗,以及强度特性如压缩,拉伸,弯曲和弹性模量。此外,还对钢纤维增强SCC的破坏模式进行了综述。结果表明,SF降低了充填和通过能力。此外,还观察到强度性能的改善。然而,一些研究报道SF对抗压能力没有影响甚至降低。此外,SF提高了SCC的抗拉能力,避免了SCC的脆性破坏。最后,该综述建议替代二次胶凝材料在sf增强SCC,以提高其抗压能力。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Steel Fiber Reinforced Self-Compacting Concrete: A Comprehensive Review
Abstract Self-compacting concrete (SCC), which flows under its own weight without being compacted or vibrating, requires no outside mechanical force to move. But like normal concrete, SCC has a brittle character (weak in tension) that causes sudden collapse with no advance notification. The tensile capacity of SCC has increased owing to the addition of steel fiber (SF). Various research concentrates on increasing the tensile strength (TS) of SCC by incorporating SF. To collect information on past research, present research developments, and future research directions on SF-reinforced SCC, however, a detailed review of the study is necessary. The main aspects of this review are the general introduction of SCC, fresh properties namely slump flow, slump T50, L box, and V funnel, and strength properties such as compressive, tensile, flexure, and elastic modulus. Furthermore, failure modes of steel fiber-reinforced SCC are also reviewed. Results suggest that the SF decreased the filling and passing ability. Furthermore, improvement in strength properties was also observed. However, some studies reported that SF had no effect or even decreased compressive capacity. Additionally, SF improved the tensile capacity of SCC and avoid undesirable brittle failure. Finally, the review recommends the substitution of secondary cementitious materials in SF-reinforced SCC to improve its compressive capacity.
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来源期刊
International Journal of Concrete Structures and Materials
International Journal of Concrete Structures and Materials CONSTRUCTION & BUILDING TECHNOLOGY-ENGINEERING, CIVIL
CiteScore
6.30
自引率
5.90%
发文量
61
审稿时长
13 weeks
期刊介绍: The International Journal of Concrete Structures and Materials (IJCSM) provides a forum targeted for engineers and scientists around the globe to present and discuss various topics related to concrete, concrete structures and other applied materials incorporating cement cementitious binder, and polymer or fiber in conjunction with concrete. These forums give participants an opportunity to contribute their knowledge for the advancement of society. Topics include, but are not limited to, research results on Properties and performance of concrete and concrete structures Advanced and improved experimental techniques Latest modelling methods Possible improvement and enhancement of concrete properties Structural and microstructural characterization Concrete applications Fiber reinforced concrete technology Concrete waste management.
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