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Tensile properties of strain-hardening cementitious composites containing polyvinyl-alcohol fibers hybridized with polypropylene fibers

添加聚乙烯醇纤维水泥复合材料的硬化拉伸性能

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Abstract

Partially replacing polyvinyl-alcohol (PVA) fibers with polypropylene (PP) fibers in strain-hardening cementitious composites (fiber hybridization) modify certain mechanical properties of these materials. The hybridization based on the introduction of low-modulus hydrophobic polypropylene fibers improves the ductility and the strain-hardening behavior of the cementitious composites containing polyvinyl-alcohol fibers of different types (PVA-SHCC). Pull-out tests indicate that adding PP fibers increases the energy capacity of the hybrid composite with respect to the material containing only PVA fibers under tensile loading, and PP-fiber geometry (i.e., section shape and length) is a key factor in enhancing the strain capacity.

摘要

在应变硬化水泥基复合材料(纤维杂交)中, 用聚丙烯部分取代聚乙烯醇(PVA)纤维, 可以改善材料的力学性能。 通过引入低模量、 疏水聚丙烯纤维, 提高聚乙烯醇纤维水泥复合材料(PVA-SHCC)的拉伸性和应变硬化性能。 拉伸试验结果表明, 加入聚丙烯纤维增强了掺杂复合材料的载荷拉伸性能。 聚丙烯纤维的几何形状(即截面形状和长度)是提高复合材料应变能力的重要因素。

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Authors and Affiliations

  1. Young Researchers and Elite Club, Central Tehran Branch, Islamic Azad University, Tehran, Iran

    H. R. Pakravan

  2. School of Chemical Engineering, Iran University of Science and Technology (IUST), Tehran, Iran

    M. Jamshidi

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  1. H. R. Pakravan
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  2. M. Jamshidi
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Correspondence to H. R. Pakravan.

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Pakravan, H.R., Jamshidi, M. Tensile properties of strain-hardening cementitious composites containing polyvinyl-alcohol fibers hybridized with polypropylene fibers. J. Cent. South Univ. 25, 51–59 (2018). https://doi.org/10.1007/s11771-018-3716-9

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  • DOI: https://doi.org/10.1007/s11771-018-3716-9

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