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A Study on the Mechanical Properties of the Hybrid Fiber-Reinforced Mortar Using the Macro Steel and Micro Carbon Fibers

Received: 29 October 2020     Accepted: 12 November 2020     Published: 19 November 2020
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Abstract

In the present study, an experiment was conducted to investigate the mechanical properties such as fluidity, compressive strength and flexural performance (flexural strength and toughness) of a single fiber-reinforced mortar (FRM) using only macro steel fiber (SF) or micro carbon fiber (CF) with different material properties and SF-CF hybrid FRM using a mixture of macro SF and micro CF. The specimens incorporated macro SF and micro CF in the mix proportions of 100-0%, 75-25%, 50-50%, 25-75% and 0-100% by volume at a total fiber volume fraction of 1.0%. Their mechanical properties were further compared and reviewed with the plain mortar at 28 days of age. The experimental results of fresh mortar showed that the table flow of mortar using only macro SF was slightly reduced compared to plain mortar, whereas the table flow of mortar using only micro CF and SF-CF hybrid mortar decreased significantly with increase of micro CF. It was revealed from the test of the hardened mortar that the SF-CF=75-25% (M3) specimen showed the highest compressive and flexural strength, and the SF-CF=50-50% (M6) specimen obtained the highest flexural toughness. Therefore, it was possible to confirm the synergistic reinforcement effect of that enhanced the strength and improved the flexural performance by hybrid of macro SF and micro CF. Based on the results of this experiment, the optimal mix proportion of SF-CF hybrid FRM is proposed in this paper to improve the compressive strength, flexural strength and flexural toughness.

Published in American Journal of Civil Engineering (Volume 8, Issue 6)
DOI 10.11648/j.ajce.20200806.11
Page(s) 128-138
Creative Commons

This is an Open Access article, distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution and reproduction in any medium or format, provided the original work is properly cited.

Copyright

Copyright © The Author(s), 2020. Published by Science Publishing Group

Keywords

Macro Steel Fiber, Micro Carbon Fiber, Hybrid Fiber-Reinforced Mortar, Flexural Performance, Fluidity

References
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[3] Yi, D. R, Ha, G. J. (2014), “Improvement of structural performance of RC beams retrofitted hybrid fiber using recycles coarse aggregate and ground granulated blast furnace slag,” Journal of the Korea Institute for Structural Maintenance and Inspection, 18 (6), 1-10.
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[6] Naaman, A. E. (2002), “Toughness, ductility, surface energy and deflection-hardening FRC composites, proceedings of the JCI international workshop on ductile fiber-reinforced cementitious composites (DFRCC),” Application and Evaluation (DFRCC-2002), JCI, 33-57.
[7] Brandt. A. M. (2008), “Fibre reinforced cement-based (FRC) composites after over 40 years of development in building and civil engineering,” Composites Structures, 86, 3-9.
[8] Zhang, P, Li, Q. F. (2013), “Effect of polypropylene fiber on durability of concrete composite containing fly ash and silica fume,” Composites: Part B, 45, 1587-1594.
[9] Kim, H. J, Kim, N. W. (2020), “Enhancement of mechanical property of concrete structure using the macro and micro steel fibers,” American Journal of Civil Engineering, 2020: 8 (1), 1-9.
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[14] Kim, S, Yoo, D. Y. (2018), “Hybrid effects of steel fiber and carbon nanotube on self-sensing capability of ultra-high-performance concrete,” Constr. Build. Mater, 185, 530-544.
[15] Park, M. S, Shin, S. Y, Jeong, E. C, Kim, Y. S. (2016), “A study on mechanical property of high strength mortar reinforced with hybrid fibers,” Journal of the Architectural Institute of Korea Structures & Construction, 32 (7), 49-56.
[16] Yao, Y, Li. J, Wu. K. (2003), “Mechanical properties of hybrid fiber-reinforced concrete at low fiber volume fraction,” Cement and Concrete Research, 33, 27-30.
[17] KS L 5105. (2007), “Test method for compressive of hydraulic cement mortar,” Korea Agency for Technology and Standards, 1-5.
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[22] Heo, G. H, Park, J. G, Song, K. C, Park, J. H, Jun, H. M. (2020), “Mechanical properties of SiO2-coated carbon fiber-reinforced mortar composites with different fiber lengths and fiber volume fractions,” Advances in Civil Engineering, Volume 2020, https://doi.org/10.1155/2020/8881273.
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Cite This Article
  • APA Style

    Gwang Hee Heo, Jong Gun Park, Hyung Min Jun, Dong Ju Seo, Sung Gon Koh. (2020). A Study on the Mechanical Properties of the Hybrid Fiber-Reinforced Mortar Using the Macro Steel and Micro Carbon Fibers. American Journal of Civil Engineering, 8(6), 128-138. https://doi.org/10.11648/j.ajce.20200806.11

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    ACS Style

    Gwang Hee Heo; Jong Gun Park; Hyung Min Jun; Dong Ju Seo; Sung Gon Koh. A Study on the Mechanical Properties of the Hybrid Fiber-Reinforced Mortar Using the Macro Steel and Micro Carbon Fibers. Am. J. Civ. Eng. 2020, 8(6), 128-138. doi: 10.11648/j.ajce.20200806.11

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    AMA Style

    Gwang Hee Heo, Jong Gun Park, Hyung Min Jun, Dong Ju Seo, Sung Gon Koh. A Study on the Mechanical Properties of the Hybrid Fiber-Reinforced Mortar Using the Macro Steel and Micro Carbon Fibers. Am J Civ Eng. 2020;8(6):128-138. doi: 10.11648/j.ajce.20200806.11

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  • @article{10.11648/j.ajce.20200806.11,
      author = {Gwang Hee Heo and Jong Gun Park and Hyung Min Jun and Dong Ju Seo and Sung Gon Koh},
      title = {A Study on the Mechanical Properties of the Hybrid Fiber-Reinforced Mortar Using the Macro Steel and Micro Carbon Fibers},
      journal = {American Journal of Civil Engineering},
      volume = {8},
      number = {6},
      pages = {128-138},
      doi = {10.11648/j.ajce.20200806.11},
      url = {https://doi.org/10.11648/j.ajce.20200806.11},
      eprint = {https://article.sciencepublishinggroup.com/pdf/10.11648.j.ajce.20200806.11},
      abstract = {In the present study, an experiment was conducted to investigate the mechanical properties such as fluidity, compressive strength and flexural performance (flexural strength and toughness) of a single fiber-reinforced mortar (FRM) using only macro steel fiber (SF) or micro carbon fiber (CF) with different material properties and SF-CF hybrid FRM using a mixture of macro SF and micro CF. The specimens incorporated macro SF and micro CF in the mix proportions of 100-0%, 75-25%, 50-50%, 25-75% and 0-100% by volume at a total fiber volume fraction of 1.0%. Their mechanical properties were further compared and reviewed with the plain mortar at 28 days of age. The experimental results of fresh mortar showed that the table flow of mortar using only macro SF was slightly reduced compared to plain mortar, whereas the table flow of mortar using only micro CF and SF-CF hybrid mortar decreased significantly with increase of micro CF. It was revealed from the test of the hardened mortar that the SF-CF=75-25% (M3) specimen showed the highest compressive and flexural strength, and the SF-CF=50-50% (M6) specimen obtained the highest flexural toughness. Therefore, it was possible to confirm the synergistic reinforcement effect of that enhanced the strength and improved the flexural performance by hybrid of macro SF and micro CF. Based on the results of this experiment, the optimal mix proportion of SF-CF hybrid FRM is proposed in this paper to improve the compressive strength, flexural strength and flexural toughness.},
     year = {2020}
    }
    

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  • TY  - JOUR
    T1  - A Study on the Mechanical Properties of the Hybrid Fiber-Reinforced Mortar Using the Macro Steel and Micro Carbon Fibers
    AU  - Gwang Hee Heo
    AU  - Jong Gun Park
    AU  - Hyung Min Jun
    AU  - Dong Ju Seo
    AU  - Sung Gon Koh
    Y1  - 2020/11/19
    PY  - 2020
    N1  - https://doi.org/10.11648/j.ajce.20200806.11
    DO  - 10.11648/j.ajce.20200806.11
    T2  - American Journal of Civil Engineering
    JF  - American Journal of Civil Engineering
    JO  - American Journal of Civil Engineering
    SP  - 128
    EP  - 138
    PB  - Science Publishing Group
    SN  - 2330-8737
    UR  - https://doi.org/10.11648/j.ajce.20200806.11
    AB  - In the present study, an experiment was conducted to investigate the mechanical properties such as fluidity, compressive strength and flexural performance (flexural strength and toughness) of a single fiber-reinforced mortar (FRM) using only macro steel fiber (SF) or micro carbon fiber (CF) with different material properties and SF-CF hybrid FRM using a mixture of macro SF and micro CF. The specimens incorporated macro SF and micro CF in the mix proportions of 100-0%, 75-25%, 50-50%, 25-75% and 0-100% by volume at a total fiber volume fraction of 1.0%. Their mechanical properties were further compared and reviewed with the plain mortar at 28 days of age. The experimental results of fresh mortar showed that the table flow of mortar using only macro SF was slightly reduced compared to plain mortar, whereas the table flow of mortar using only micro CF and SF-CF hybrid mortar decreased significantly with increase of micro CF. It was revealed from the test of the hardened mortar that the SF-CF=75-25% (M3) specimen showed the highest compressive and flexural strength, and the SF-CF=50-50% (M6) specimen obtained the highest flexural toughness. Therefore, it was possible to confirm the synergistic reinforcement effect of that enhanced the strength and improved the flexural performance by hybrid of macro SF and micro CF. Based on the results of this experiment, the optimal mix proportion of SF-CF hybrid FRM is proposed in this paper to improve the compressive strength, flexural strength and flexural toughness.
    VL  - 8
    IS  - 6
    ER  - 

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Author Information
  • Department of International Civil and Plant Engineering, Konyang University, Nonsan, Republic of Korea

  • Public Safety Research Center (PSRC), Konyang University, Nonsan, Republic of Korea

  • Department of Disaster and Safety Engineering, Konyang University, Nonsan, Republic of Korea

  • Moowang Construction, Iksan, Republic of Korea

  • Department of Cadastre & Civil Engineering, Jeonju Vision College, Jeonju, Republic of Korea

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