Crack-healing of cost-effective engineered cementitious composites reinforced by recycled selvage fiber

IF 10.8 1区工程技术 Q1 CONSTRUCTION & BUILDING TECHNOLOGY

Cement & concrete composites Pub Date : 2024-09-26 DOI:10.1016/j.cemconcomp.2024.105776

Huy Hoàng Nguyễn , Phương Hoàng Nguyễn , Quang-Hiếu Lương , Se-Eon Park , Youngsang Kim , Bang Yeon Lee

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引用次数: 0

Abstract

This paper presents the first experimental investigation of the crack-healing behavior of recycled selvage fiber-reinforced engineered cementitious composites (RSF-ECCs). Fly ash (FA), ground granulated blast-furnace slag (GGBS), and crumb rubber powder were utilized to fabricate greener ECCs. RSF was used as main reinforcement; it contains polyethylene (PE), glass (GS), and PET fibers. For overall mechanical properties, RSF-ECC incorporating GGBS (ECC-S-RSF) obtained a compressive strength of over 80 MPa and a tensile strain capacity of over 10 %, values that are unprecedented in other recycled fiber-reinforced ECCs. Furthermore, the ECC-S-RSF showed the best cost efficiency among representative recycled and PE fiber-reinforced high-performance ECCs. In terms of the crack-healing performance, test results indicated that RSF-ECCs had excellent healing capacity in closing crack openings, and GGBS had a greater contribution to crack-healing than FA did. However, the stiffness and tensile restorations of RSF-ECCs were relatively modest compared to those of conventional ECCs. Calcium carbonate and C-S-H gel were dominant healing materials of RSF-ECCs.

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用回收的边角纤维增强的成本效益型工程水泥基复合材料的裂缝愈合能力

本文首次对回收边角纤维增强工程水泥基复合材料（RSF-ECCs）的裂缝愈合行为进行了实验研究。本文利用粉煤灰 (FA)、磨细高炉矿渣 (GGBS) 和橡胶屑粉末来制造更环保的 ECC。RSF 用作主要增强材料；它包含聚乙烯（PE）、玻璃（GS）和 PET 纤维。在整体机械性能方面，含有 GGBS 的 RSF-ECC （ECC-S-RSF）的抗压强度超过 80 兆帕，拉伸应变能力超过 10%，这些数值在其他回收纤维增强 ECC 中都是前所未有的。此外，在具有代表性的再生纤维和聚乙烯纤维增强高性能 ECC 中，ECC-S-RSF 的成本效益最高。在裂缝愈合性能方面，测试结果表明 RSF-ECC 在闭合裂缝开口方面具有出色的愈合能力，GGBS 对裂缝愈合的贡献大于 FA。不过，与传统的 ECC 相比，RSF-ECC 的刚度和拉伸恢复能力相对较弱。碳酸钙和 C-S-H 凝胶是 RSF-ECC 的主要愈合材料。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Cement & concrete composites 工程技术-材料科学：复合

CiteScore

18.70

自引率

11.40%

发文量

459

审稿时长

65 days

期刊介绍： Cement & concrete composites focuses on advancements in cement-concrete composite technology and the production, use, and performance of cement-based construction materials. It covers a wide range of materials, including fiber-reinforced composites, polymer composites, ferrocement, and those incorporating special aggregates or waste materials. Major themes include microstructure, material properties, testing, durability, mechanics, modeling, design, fabrication, and practical applications. The journal welcomes papers on structural behavior, field studies, repair and maintenance, serviceability, and sustainability. It aims to enhance understanding, provide a platform for unconventional materials, promote low-cost energy-saving materials, and bridge the gap between materials science, engineering, and construction. Special issues on emerging topics are also published to encourage collaboration between materials scientists, engineers, designers, and fabricators.