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首页> 外文期刊>Advances in materials science and engineering >Mechanical Properties and Durability of Latex-Modified Fiber-Reinforced Concrete: A Tunnel Liner Application
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Mechanical Properties and Durability of Latex-Modified Fiber-Reinforced Concrete: A Tunnel Liner Application

机译：乳胶改性纤维增强混凝土的力学性能和耐久性：隧道衬板的应用

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摘要

This study assessed the mechanical properties and durability of latex-modified fiber-reinforced segment concrete (polyolefin-based macrosynthetic fibers and hybrid fiber-macrosynthetic fiber and polypropylene fiber) for a tunnel liner application. The tested macrosynthetic fiber-reinforced concrete has a better strength than steel fiber-reinforced concrete. The tested concrete with blast furnace slag has a higher chloride ion penetration resistance (less permeable), but its compressive and flexural strengths can be reduced with blast furnace slag content increase. Also, the hybrid fiber-reinforced concrete has higher compressive strength, flexural strength, chloride ion water permeability resistance, impact resistance, and abrasion resistance than the macrosynthetic fiber-reinforced concrete. The modified fiber improved the performance of concrete, and the hybrid fiber was found to control the formation of micro- and macrocracks more effectively. Therefore, overall performance of the hybrid fiber-reinforced concrete was found superior to the other fiber-reinforced concrete mixes tested for this study. The test results also indicated that macrosynthetic fiber could replace the steel fiber as a concrete reinforcement.
机译：这项研究评估了用于隧道衬砌的乳胶改性纤维增强分段混凝土（聚烯烃基大合成纤维以及杂化纤维-大合成纤维和聚丙烯纤维）的机械性能和耐久性。经测试的宏观合成纤维增强混凝土具有比钢纤维增强混凝土更好的强度。带有高炉矿渣的被测混凝土具有较高的耐氯离子渗透性（渗透性较低），但是随着高炉矿渣含量的增加，其抗压强度和抗弯强度会降低。而且，混合纤维增强混凝土比宏观合成纤维增强混凝土具有更高的抗压强度，抗弯强度，耐氯离子水渗透性，抗冲击性和耐磨性。改性纤维改善了混凝土的性能，发现混合纤维可以更有效地控制微裂纹和大裂纹的形成。因此，发现混合纤维增强混凝土的整体性能优于为该研究测试的其他纤维增强混凝土混合物。试验结果还表明，宏观合成纤维可以代替钢纤维作为混凝土增强材料。

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