| A study on manufacturing CFRP rebar with a high tensile strength |
| Nam-il Kim1, Do-young Kwon1, Darkhijav Burenkhangai2, Kyo-moon Lee3, Seoung-youl Bae3, Yong-sik Chu1 |
1Low-Carbon and DX R&D Division , Korea Institute of Ceramic Engineering and Technology, 101, Soho-ro, Jinju-si, Gyeongsangnam-do, Republic of Korea
2Laboratory of Material Science and Technology, Institute of Chemistry and Chemical Technology , Mongolian Academy of Science, 13330, Peace Avenue, MAS 4th Building, Bayanzurkh District, Ulaanbaatar 210351, Mongolia
3Emerging Materials R&D Division , Korea Institute of Ceramic Engineering and Technology, 101, Soho-ro, Jinju-si, Gyeongsangnam-do, Republic of Korea |
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Received: August 9, 2022; Revised: October 28, 2022 Accepted: November 16, 2022. Published online: January 31, 2023. |
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| ABSTRACT |
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In this study, high-strength CFRP using carbon fiber as the main rebar and glass fiber for the rib was developed. For production of CFRP, physical properties of various types of fibers were examined through optical microscopy, XRD analysis, and a tensile strength test. In addition, to verify the behavior according to the carbon fiber and the type of resin, a carbon composite was fabricated with varied fiber content and curing temperature. The physical properties of the fabricated carbon composite were measured using tensile strength and fracture shape tests. A high-strength CFRP rebar was manufactured using the pultrusion method and its mechanical properties, specifically tensile strength and elastic modulus, were measured. The CFRP rebar developed in this study showed relatively higher tensile strength and elastic modulus than the existing CFRP rebars, and it appeared that the developed CFRP rebar had a relatively smaller amount of pores than existing CFRP rebars. |
| Key words:
Carbon fiber · Glass fiber · Carbon fiber-reinforced polymer · Tensile strength · Pultrusion |
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