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废旧轮胎纺织纤维增强喷射混凝土力学性能评估

Assessment of mechanical behavior of sprayed concrete reinforced with waste tire textile fibers.

作者信息

Khosh Behzad, Atapour Hadi

机构信息

Department of Earth Sciences Engineering, Arak University of Technology, Arak, Iran.

出版信息

Sci Rep. 2024 Apr 17;14(1):8873. doi: 10.1038/s41598-024-59339-2.

DOI:10.1038/s41598-024-59339-2
PMID:38632345
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC11024134/
Abstract

The primary objective of this research is to assess the mechanical properties of shotcrete or sprayed concrete reinforced with waste tire textile fibers (WTTFs). Shotcrete is extensively employed in civil and mining engineering projects for support systems. This study examines the physical and mechanical characteristics of shotcrete samples, both without fibers and reinforced with WTTFs, including density, water absorption, volume of permeable voids, ultrasonic pulse velocity, uniaxial compressive strength, and splitting tensile strength. The reinforced samples consist of WTTF fibers at 0.5%, 1%, and 1.5% concentrations. Test results demonstrate that the inclusion of waste tire textile fibers enhances the mechanical properties of shotcrete, particularly its deformability and energy absorption capacity. Based on the test outcomes, a 1% fiber concentration is recommended as the most suitable ratio for utilizing waste tire textile fibers in shotcrete. Furthermore, these flexible fibers do not impede shotcrete pumping or spraying capabilities.

摘要

本研究的主要目的是评估用废旧轮胎纺织纤维（WTTF）增强的喷射混凝土的力学性能。喷射混凝土在土木和采矿工程项目的支护系统中广泛应用。本研究考察了不含纤维以及用WTTF增强的喷射混凝土样品的物理和力学特性，包括密度、吸水率、透气孔隙体积、超声脉冲速度、单轴抗压强度和劈裂抗拉强度。增强样品包含浓度为0.5%、1%和1.5%的WTTF纤维。试验结果表明，加入废旧轮胎纺织纤维可提高喷射混凝土的力学性能，特别是其变形能力和能量吸收能力。根据试验结果，建议1%的纤维浓度是在喷射混凝土中使用废旧轮胎纺织纤维的最合适比例。此外，这些柔性纤维不会妨碍喷射混凝土的泵送或喷射能力。

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