Concrete is weak in tension, causing brittle failure without warning. Fiber is one of the simplest techniques to increase tensile strain. Several kinds of fibers (synthetic) are available such as steel fiber, glass fiber, and carbon fiber. However, these fibers are expensive and cannot be easily accessible. Researchers use agricultural fiber in concrete instead of synthetic fibers to offset this deficiency. Although, several studies have shown that agricultural fiber may be utilized to increase concrete tensile strength. However, a details review is required which combines all relevant information and the reader can evaluate the benefits of agricultural fiber. Therefore, this review focus on a comprehensive and up-to-date overview of the impact of agricultural fiber on concrete slump flow, mechanical quality, and durability. Furthermore, scanning electronic microscopy, enhancement methods, and agricultural fiber-reinforced concrete (AFRC) applications are also reviewed. Five different types of agricultural fiber including coconut, jute, banana, rice straw, and hemp fibers were selected. According to the findings, agricultural fiber increased concrete’s mechanical and durability qualities while comparably decreasing the slump. The optimum dose is essential as the higher dose adversely affects mechanical performance. The typical optimum amount varies from 1% to 2% by weight/volume of the binder. Among various types of agricultural fiber, coconut fiber is super performance. Less research is carried out on hemp, straw ash, and banana fibers than on coconut and jute fibers.

中文翻译：

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农业纤维增强混凝土强度的提高：力学性能评估和微观结构分析

混凝土的张力较弱，会在没有警告的情况下导致脆性破坏。纤维是增加拉伸应变的最简单技术之一。有多种纤维（合成纤维）可供选择，例如钢纤维、玻璃纤维和碳纤维。然而，这些纤维价格昂贵且不容易获得。研究人员在混凝土中使用农业纤维代替合成纤维来弥补这一缺陷。尽管如此，一些研究表明农业纤维可用于提高混凝土的拉伸强度。然而，需要结合所有相关信息进行详细审查，读者才能评估农业纤维的好处。因此，本综述重点全面、最新地概述了农业纤维对混凝土坍落度、机械质量和耐久性的影响。此外，还回顾了扫描电子显微镜、增强方法和农业纤维增强混凝土（AFRC）应用。选择了椰子纤维、黄麻纤维、香蕉纤维、稻草纤维和大麻纤维等五种不同类型的农业纤维。研究结果表明，农业纤维提高了混凝土的机械性能和耐久性能，同时相对降低了坍落度。最佳剂量至关重要，因为较高剂量会对机械性能产生不利影响。典型的最佳用量为粘合剂重量/体积的 1% 至 2%。在各类农业纤维中，椰子纤维的性能最为优异。对大麻、草灰和香蕉纤维的研究少于对椰子和黄麻纤维的研究。