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http://dx.doi.org/10.5345/JKIBC.2020.20.1.011

Hydration and Electrical Resistance of Cement Composites Containing MWCNTs  

Lee, Gun-Cheol (Department of Architectural Engineering, Korea National University of Tranportation)
Kim, Young-Min (Department of Architectural Engineering, Korea National University of Tranportation)
Publication Information
Journal of the Korea Institute of Building Construction / v.20, no.1, 2020 , pp. 11-18 More about this Journal
Abstract
Carbon nanotubes are used in various industries with their excellent mechanical properties and electrical conductivity. In the construction industry, research is being conducted to give self-sensing capabilities to structures, but the results of experiments vary among researchers, and the analysis is insufficient. Therefore, in this study, the hydration and electrical properties of MWCNT-added cement pastes were measured. The electrical resistance values of hydration heat, porosity, Rietveld quantitative analysis, compressive strength, and distance were measured.. The heat resistance, porosity, Rietvelt quantitative analysis, compressive strength and distance were measured according to electrical resistance. Experimental results showed that the heat of hydration decreased with increasing MWCNT. XRD Rietveld quantitative analysis showed that there was no significant difference in the amount of hydration products with increasing addition rate of MWCNT. As a result of SEM analysis, the MWCNT is agglomerated by van der Waals forces, and this area is considered to be caused by voids and weak areas. The electrical resistance value decreases as the addition rate is increased, and thus may play a role for magnetic sensing in the future.
Keywords
MWCNT; hydration heat; strength development; electrical resistance;
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Times Cited By KSCI : 5  (Citation Analysis)
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