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Development of ultra-high performance engineered cementitious composites using polyethylene (PE) fibers

机译：使用聚乙烯（PE）纤维开发超高性能工程水泥复合材料

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Ultra-high performance engineered cementitious composites (UHP-ECC), which combines the strain-hardening and multiple crack characteristics and the high strength of mortar matrix, was investigated in this study. The tensile strength and elongation of the UHP-ECC achieved were 20 MPa and 8.7%, respectively. For the production of UHP-ECC, ultra-high-molecular-weight polyethylene (PE) fibers were deployed to reinforce the ultra-high strength mortar while special attention was paid to the mix process to ensure satisfactory fiber dispersion. The tensile stress-strain curves, the compressive strength and elastic modulus, and the flexural behavior of UHP-ECC were investigated to understand its mechanical performance. The digital image correlation (DIC) technique was utilized to monitor the crack patterns of UHP-ECC during the tensile and flexural tests. In addition, Scanning electron microscope (SEM) analysis was conducted to achieve an in-depth understanding of the microstructure of UHP-ECC. (C) 2017 Elsevier Ltd. All rights reserved.
机译：本研究研究了结合了应变硬化和多重裂纹特性以及砂浆基体的高强度的超高性能工程胶凝复合材料（UHP-ECC）。所获得的UHP-ECC的拉伸强度和伸长率分别为20 MPa和8.7％。为了生产UHP-ECC，部署了超高分子量聚乙烯（PE）纤维以增强超高强度砂浆，同时特别注意混合过程以确保令人满意的纤维分散。研究了UHP-ECC的拉伸应力-应变曲线，抗压强度和弹性模量以及弯曲行为，以了解其机械性能。数字图像相关技术（DIC）用于在拉伸和弯曲测试过程中监控UHP-ECC的裂纹模式。此外，还进行了扫描电子显微镜（SEM）分析，以深入了解UHP-ECC的微观结构。 （C）2017 Elsevier Ltd.保留所有权利。

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