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Title |
Synergistic Effects of Carbon Nanotubes and Carbon Fibers on the Heat Generation and Electrical Properties of Cement Composites
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Authors |
전형민(Hyung-Min Jun) ; 박종건(Jong-Gun Park) ; 허광희(Gwang-Hee Heo) |
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DOI |
https://doi.org/10.11112/jksmi.2026.30.1.44 |
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Keywords |
탄소나노튜브; 탄소섬유; 시멘트 복합체; 발열; 전기적 특성 Carbon nanotubes; Carbon fibers; Cement composites; Heat generation; Electrical properties |
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Abstract |
This study experimentally analyzed the synergistic effect of carbon nanotubes (CNT) and carbon fibers (CF) on the heat generation and electrical properties of cement composites under various thermal conditions. The tests on heat generation and electrical properties were conducted with parameters such as CNT concentrations (0.3 wt.%, 0.6 wt.%), and CF contents (0.3 vol.%, 0.6 vol.%, 1.0 vol.%), various applied voltages (DC 10V, 20 V, 30V, 60V), and different electrode spacings (40 ㎜, 120 ㎜). Furthermore, the surface morphology and microstructure of the conductive cement composite were analyzed using scanning electron microscope (SEM) and energy-dispersive X-ray spectroscopy (EDS). Test results showed that cement composites incorporating CNT and CF together improved the heat generation capacity and electrical properties, confirming that the combination of the two materials was effective in improving conductive properties. In particular, at an applied voltage of 20 V and an electrode spacing of 40 ㎜, the ‘CF0.6CNT0.6’ specimen showed the highest temperature of all specimens, rising to 157.4℃. In addition, as the mixing concentration of CNT and the applied voltage increased, the heat generation capacity improved, and a higher temperature increase effect was exhibited with a narrower electrode spacing. However, even when the concentration of CNT mixed was added up to 1.0 wt.%, the heat generation capacity was not improved. Analysis results of SEM image and EDS confirmed that a conductive network was formed between the CNT and CF particles within the cement matrix.
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