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Title |
The Self-Heating and Electrical Properties of Conductive Sidewalk Blocks Mixed with Multi-Walled Carbon Nanotubes and Carbon Fibers
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Authors |
서동주(Dong-Ju Seo) ; 전형민(Hyung-Min Jun) ; 박종건(Jong-Gun Park) ; 최범균(Beom-Gyun Choi) ; 허광희(Gwang-Hee Heo) |
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DOI |
https://doi.org/10.4334/JKCI.2025.37.2.207 |
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Keywords |
다중벽 탄소나노튜브; 탄소섬유; 전도성 보도블록(I형); 자가 발열; 전기적 특성 multi-walled carbon nanotubes; carbon fibers; conductive sidewalk block (type I); self-heating; electrical properties |
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Abstract |
Conductive sidewalk blocks are created by adding a conductive agent to conventional sidewalk blocks and applyingcurrent through electrodes embedded within the blocks. The heat generated by this process can melt snow and ice in areas prone tofreezing, such as sidewalks and pavements. This study investigated the effects of conductive materials, specifically multi-walledcarbon nanotubes (MWCNTs) and carbon fibers (CFs), on the flow performance, self-heating capability, and electrical properties ofconductive sidewalk blocks (Type I). Experimental results showed that as the mixing concentration of MWCNTs and the amount ofCF increased, the self-heating performance improved and significantly reduced electrical resistivity. Additionally, while the plaincement mixture and the cement mixtures mixed with MWCNT satisfied the target flow value of 180 mm, cement mixtures mixedwith only CF exhibited a significant reduction in flow performance due to clumping. High-resolution field-emission scanningelectron microscopy (HR FE-SEM) analysis confirmed that MWCNTs were relatively evenly distributed within the cement matrixalongside CF.
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