Durability and ductility of plain cement concrete (PC) can be upgraded by the simultaneous incorporation of fibers and supplementary cementitious materials. To this end, influence of different fibers such as steel fiber (SF), glass fiber (GF), carbon fiber (CF), and polypropylene fiber (PF) is studied on mechanical and durability properties of concrete with and without silica fume. Silica fume was used as 10% by mass replacement of ordinary Portland cement. Various mechanical and durability properties were studied such as compressive strength, split tensile strength, flexural strength, water absorption (WA), chloride penetration (CP), and acid attack resistance of concrete. The results of testing revealed that silica fume improved the efficiency of fibers in resisting the tensile and flexural loads. The composite effect of fiber and silica fume was more beneficial than the sum of the effects of their individual incorporation. Steel fiber‐reinforced concrete (SFRC) showed better mechanical performance at 28 days as compared to other FRCs but CFRC showed better performance at 180 days. PFRC and CFRC exhibited better durability performance than SFRC and GFRC. Silica fume helped in reducing the WA and CP of FRCs and improved their acid attack resistance.

中文翻译：

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不同纤维对硅粉混凝土力学性能和耐久性能的影响

通过同时掺入纤维和辅助胶凝材料，可以提高普通水泥混凝土（PC）的耐久性和延展性。为此，研究了不同纤维（如钢纤维（SF），玻璃纤维（GF），碳纤维（CF）和聚丙烯纤维（PF））对有无硅粉的混凝土的机械性能和耐久性能的影响。通过质量替代普通硅酸盐水泥，硅粉的使用量为10％。研究了各种机械和耐久性能，例如抗压强度，劈裂抗拉强度，挠曲强度，吸水率（WA），氯化物渗透率（CP）和混凝土的耐酸侵蚀性。测试结果表明，硅粉提高了纤维抵抗拉伸和弯曲载荷的效率。纤维和硅粉的复合作用比单独掺入的作用总和更有利。与其他FRC相比，钢纤维增强混凝土（SFRC）在28天时表现出更好的机械性能，但CFRC在180天时表现出更好的性能。PFRC和CFRC具有比SFRC和GFRC更好的耐久性能。硅粉有助于降低FRC的WA和CP，并提高其耐酸侵蚀性。