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Comparison of the Effects of Different Fibers on the Properties of Self-compacting Concrete

机译:不同纤维对自密实混凝土性能影响的比较

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There have been made many improvements in the recipe of Self-Compacting Concrete (SCC) during last few years, the earlier efforts mainly focused on the improvement of rheology, mechanical properties and cost effectiveness. During this decade various types of fibers impregnation have been investigated on the enhancement of ductility and tensile strength. The principal aim of this research study was to investigate the role of different types of fiber impregnation such as steel, Polyvinyl Alcohol (PVA) and chopped basalt fibers on the fresh and harden properties of SCC containing fly ash and/or silica fume as partial replacement of cement. In general, all types of fiber impregnation caused an increase in water demand to achieve the required workability and a small reduction (10 to 15%) in compressive strength. However, the contributing effects of fibers were observed in the improvement of flexural and tensile strength as well as enhanced ductility, PVA and basalt fibers showed better performance than the steel fibers in this respect.
机译:在过去几年中,自密实混凝土(SCC)的配方已有许多改进,早期的工作主要集中在流变学,机械性能和成本效益方面。在这十年中,已经研究了各种类型的纤维浸渍方法,以提高延展性和拉伸强度。这项研究的主要目的是研究不同类型的纤维浸渍,例如钢,聚乙烯醇(PVA)和切碎的玄武岩纤维对含粉煤灰和/或硅粉作为部分替代品的SCC的新鲜和硬化性能的作用。水泥。通常,所有类型的纤维浸渍都会导致需水量的增加,以达到所需的可加工性,并且抗压强度会略有降低(10%至15%)。然而,在改善抗弯强度和拉伸强度以及增强延展性方面观察到了纤维的贡献作用,在这方面,PVA和玄武岩纤维表现出比钢纤维更好的性能。

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