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首页> 外文期刊>The Journal of the Textile Institute >The effect of hydrophilic (polyvinyl alcohol) fiber content on the flexural behavior of engineered cementitious composites (ECC)
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The effect of hydrophilic (polyvinyl alcohol) fiber content on the flexural behavior of engineered cementitious composites (ECC)

机译：亲水性（聚乙烯醇）纤维含量对工程水泥复合材料（ECC）弯曲性能的影响

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摘要

This paper investigates the effect of hydrophilic polyvinyl alcohol (PVA) fiber's content (1.2-2.0% volume of composite) on the flexural behavior of engineered cementitious composites (ECC) materials. Different parameters of flexural behavior such as strength at first-cracking and post-cracking stages, deflection at ultimate load, toughness indices according to ASTM 1018, flexural modulus, and energy absorption were determined. Test results showed that the flexural strength and flexural modulus of composites significantly increases by increment in fiber content. However, flexural strength of composites varies from 8.5 to 14MPa depending on amount of PVA fibers. The toughness indices, deflection at max load and energy absorption were decreased by further increase in the fiber content from 1.6 to 2%. It was indicated that there was an indirect relationship between flexural strength and ductility of composite in higher amount of fiber content.
机译：本文研究了亲水性聚乙烯醇（PVA）纤维含量（复合材料体积的1.2-2.0％）对工程胶结复合材料（ECC）材料弯曲性能的影响。确定了挠曲行为的不同参数，例如第一裂纹和第二裂纹后的强度，极限载荷下的挠度，根据ASTM 1018的韧性指数，挠曲模量和能量吸收。试验结果表明，随着纤维含量的增加，复合材料的弯曲强度和弯曲模量显着增加。然而，取决于PVA纤维的量，复合材料的弯曲强度在8.5MPa至14MPa之间变化。纤维含量从1.6％进一步提高到2％，可降低韧性指数，最大载荷下的挠度和能量吸收。结果表明，纤维含量较高时，复合材料的弯曲强度与延性之间存在间接关系。

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