Abstract
The modulus of elasticity, resistivity and capacitive reactance were determined for carbon nanotube reinforced mortars, near percolation. It is shown that the abrupt decrease of the resistivity values observed at the CNT content of 0.1 wt% is associated with the onset of percolation. Mortars reinforced with 0.1 wt% CNTs exhibit an 89% increase in Young’s modulus. Values of resistivity and capacitance are 27% and 90% lower than that of the plain mortar, respectively. After the conductive network is formed, resistivity values show a little dependence on the CNT content, reaching a plateau. Capacitance on the other hand was increased by an order of magnitude, showing an amplified energy storage ability, probably due to the existence of small CNT agglomerates. The observed relationship between capacitance values and modulus of elasticity may provide valuable information on the actual CNT dispersion state in the matrix.
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References
Gdoutos, E.E., Konsta-Gdoutos, M.S., Danoglidis, P.A.: Portland cement mortar nanocomposites at low carbon nanotube and carbon nanofiber content: a fracture mechanics experimental study. Cement Concr. Compos. 70, 110–118 (2016)
Danoglidis, P.A., Konsta-Gdoutos, M.S., Gdoutos, E.E., Shah, S.P.: Strength, energy absorption capability and self-sensing properties of multifunctional carbon nanotube reinforced mortars. Constr. Build. Mater. 120, 265–274 (2016)
Konsta-Gdoutos, M.S., Danoglidis, P.A., Falara, M.G., Nitodas, S.F.: Fresh and mechanical properties, and strain sensing of nanomodified cement mortars: the effects of MWCNT aspect ratio, density and functionalization. Cement Concr. Compos. 82, 137–151 (2017)
Li, J., Ma, P.C., Chow, W.S., To, C.K., Tang, B.Z., Kim, J.K.: Correlations between percolation threshold, dispersion state, and aspect ratio of carbon nanotubes. Adv. Func. Mater. 17(16), 3207–3215 (2007)
Hsu, W.K., Kotzeva, V., Watts, P.C.P., Chen, G.Z.: Circuit elements in carbon nanotube-polymer composites. Carbon 42, 1707–1712 (2004)
Shah, S.P., Konsta-Gdoutos, M.S., Metaxa, Z.S.: Highly concentrated carbon nanotube suspensions for cementitious Materials. United States Patent No. 9,499,439 (B2), 22 November 2016
Konsta-Gdoutos, M.S., Metaxa, Z.S., Shah, S.P.: Multi-scale mechanical and fracture characteristics and early-age strain capacity of high performance carbon nanotube/cement nanocomposites. Cement Concr. Compos. 32(2), 110–115 (2010)
Azhari, F., Banthia, N.: Cement-based sensors with carbon fibers and carbon nanotubes for piezoresistive sensing. Cement Concr. Compos. 34, 866–873 (2012)
Acknowledgements
The authors would like to kindly acknowledge the company Glonatech S.A. for supplying CNTs.
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Konsta-Gdoutos, M.S., Danoglidis, P.A., Falara, M.G., Maglogianni, M.E., Gdoutos, E.E. (2019). Enhanced Young’s Modulus in Percolative Cementitious Composites Reinforced with Carbon Nanotubes. In: Gdoutos, E. (eds) Proceedings of the First International Conference on Theoretical, Applied and Experimental Mechanics. ICTAEM 2018. Structural Integrity, vol 5. Springer, Cham. https://doi.org/10.1007/978-3-319-91989-8_7
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DOI: https://doi.org/10.1007/978-3-319-91989-8_7
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