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Title |
Effect of CNTs Incorporation on the Freeze-Thaw Resistance of Conductive Cement Mortar
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Authors |
이건철(Gun-Cheol Lee) ; 서수연(Soo-Yeon Seo) ; 윤현도(Hyun-Do Yun) ; 홍성원(Sung Won Hong) ; 김영민(Young Min Kim) |
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DOI |
https://doi.org/10.4334/JKCI.2021.33.4.335 |
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Keywords |
탄소나노튜브; 동결융해; 전기저항; 전도성; 내구성 carbon nano tubes; freeze-thawing; electrical resistance; conductive; durability |
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Abstract |
In this study, the durability and electrical performance of conductive cement mortar with added CNTs were evaluated after freezing and thawing. Two types of CNT were used, MWCNT and SWCNT, and the addition rates were 0, 0.5 %, 1.0 %, and 2.0 %. As a result of the experiment, it was found that the decrease in the relative dynamic modulus and mass change rate was reduced regardless of the CNT type and addition rate, indicating that the resistance to freezing and thawing was improved. It is judged that the resistance to freezing and thawing improves due to the buffering action caused by the pores generated by CNTs, and the change in the electrical resistance value after freezing and thawing did not show a significant change (around 2 %). Therefore, it is believed that the electrical performance of the conductive cement mortar in which freeze-thaw damage has occurred can be maintained continuously.
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