☆ 4.7 Article

Mechanical behavior of waste fishing net fiber-reinforced cementitious composites subjected to direct tension

JOURNAL OF BUILDING ENGINEERING (2021)

Journal

JOURNAL OF BUILDING ENGINEERING

Volume 33, Issue -, Pages -

Publisher

ELSEVIER

DOI: 10.1016/j.jobe.2020.101622

Keywords

Waste fishing net fibers; Fiber-reinforced cementitious composites; Tensile behavior; First cracking; Post-cracking

Funding

Korea Institute of Ocean Science and Technology (KIOST) [PE99833]
Korea Institute of Marine Science & Technology Promotion (KIMST) [PE99833] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)

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Abstract

The study found that adding WFN fibers to cement mortar can significantly improve its strength and ductility. As the fiber volume increased, the compressive and first cracking strengths decreased, while the post-cracking strength increased. Samples with a fiber volume of 0.5% in WFN3-FRCCs exhibited the highest compressive strength, while those with a fiber volume of 1.0% had the highest post-cracking strength.

In this study, we investigated the mechanical behavior of waste fishing net (WFN) fiber-reinforced cementitious composites (FRCCs) subjected to direct tension to evaluate the possibility of using WFN fibers as reinforcement in cementitious composites. Three different WFN fibers, two commercial (C) polypropylene (PP) fibers, and two fiber volumes (0.5 and 1.0%) were considered as test variables to explore the effect of adding WFN fiber to a cement mortar. As the fiber volume was increased, both the compressive and first cracking strengths decreased, while the post-cracking strength increased. Reinforced samples (WFN3-FRCCs) with a 0.5% fiber volume exhibited the highest compressive strength, while those with a fiber volume of 1.0% had the highest post-cracking strength. The compressive and post-cracking strengths of WFN3-FRCCs were 6-10% and 2-13% higher than those of C-FRCCs, respectively. Therefore, WFN-fibers consisting of twisted yarns, which generate mechanical bonds during fiber pull-out, are appropriate for reinforcing cement mortar, thereby improving their strength and ductility under tensile loads.

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Experimental study on strength and flexural toughness properties of waste fishing net hybrid fiber-reinforced cementitious composites

Jun Kil Park, Ki-Nam Hong, Seoung Ik Choi, Taek Hee Han, Min Ook Kim

Summary: In this study, the flexural response of waste fishing net hybrid fiber-reinforced cementitious composites (WFNHFRCCs) was experimentally investigated to evaluate the hybrid effect of WFN fibers. It was found that the addition of micro-WFN fibers reduced the shrinkage of the material, and the addition of both macro- and micro-WFN fibers improved the flexural toughness and residual strength. The use of hand-cut macro-WFN fibers and grinded waste rope fibers resulted in the highest compressive strength, flexural strength, and residual strength.

COMPOSITE STRUCTURES (2022)