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Title |
Effects of CNT Additions on Mechanical Properties and Microstructures of Cement
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Authors |
오성우(Sungwoo Oh) ; 오경석(Kyeong-seok Oh) ; 정상화(Sang-hwa Jung) ; 정원석(Wonseok Chung) ; 유성원(Sung-won Yoo) |
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DOI |
https://doi.org/10.11112/jksmi.2017.21.6.162 |
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Keywords |
시멘트 ; CNT 첨가량 ; 역학특성 ; 미세구조 ; MIP ; SEM ; 강도 ; TGA Cement ; CNT addition ; Mechanical properties ; Microstructures ; MIP ; SEM ; Strength ; TGA |
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Abstract |
Carbon nanotube(CNT) is one of the promising construction materials to produce concrete with high strength and durability by adding in the concrete mixtures from various researches. Also, its superior heat conductivity can be one of the options to develop self-heating concrete. In this research, the fundamental study was conducted to investigate mechanical properties and microstructures of cement pastes and mortars by strength tests and porosity measurement with several CNT additions, which were 0 wt%, 0.115 wt%, 0.23 wt% and 0.46 wt% of CNT-cement ratio. Compressive and flexural strength test were conducted at 3, 7 and 28 days, and pore characteristics were investigated by mercury intrusion porosimetry. SEM-EDS and Thermogravimetric analysis(TGA) were conducted to prove the hydration product types and CNT dispersion in the cement matrix. As a result, even though high amount of CNT additions were caused worse performance, mixtures with 0.115 wt% of CNTs developed the similar performance with plain mixture.
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