International Journal of Concrete Structures and Materials

Korea Concrete Institute (한국콘크리트학회)
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Image Analysis and DC Conductivity Measurement for the Evaluation of Carbon Nanotube Distribution in Cement Matrix

  • Nam, I.W. (Department of Civil and Environmental Engineering, Korea Advanced Institute of Science and Technology) ;
  • Lee, H.K. (Department of Civil and Environmental Engineering, Korea Advanced Institute of Science and Technology)
  • Received : 2015.09.22
  • Accepted : 2015.11.26
  • Published : 2015.12.31
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Abstract

The present work proposes a new image analysis method for the evaluation of the multi-walled carbon nanotube (MWNT) distribution in a cement matrix. In this method, white cement was used instead of ordinary Portland cement with MWNT in an effort to differentiate MWNT from the cement matrix. In addition, MWNT-embedded cement composites were fabricated under different flows of fresh composite mixtures, incorporating a constant MWNT content (0.6 wt%) to verify correlation between the MWNT distribution and flow. The image analysis demonstrated that the MWNT distribution was significantly enhanced in the composites fabricated under a low flow condition, and DC conductivity results revealed the dramatic increase in the conductivity of the composites fabricated under the same condition, which supported the image analysis results. The composites were also prepared under the low flow condition (114 mm < flow < 126 mm), incorporating various MWNT contents. The image analysis of the composites revealed an increase in the planar occupation ratio of MWNT, and DC conductivity results exhibited dramatic increase in the conductivity (percolation phenomena) as the MWNT content increased. The image analysis and DC conductivity results indicated that fabrication of the composites under the low flow condition was an effective way to enhance the MWNT distribution.

Keywords

References

  1. ASTM International. (2013). ASTM C1437-standard test method for flow of hydraulic cement mortar. West Conshohocken, PA: ASTM.
  2. Daimon, M., & Roy, D. M. (1979). Rheological properties of cement mixes: II. Zeta potential and preliminary viscosity studies. Cement and Concrete Research, 9(1), 103-109. https://doi.org/10.1016/0008-8846(79)90100-5
  3. Fan, M. Z., Bonfield, P. W., Dinwoodie, J. M., & Breese, M. C. (2000). Dimensional instability of cement bonded particleboard: SEM and image analysis. Journal of Materials Science, 35(24), 6213-6220. https://doi.org/10.1023/A:1026733313070
  4. Kang, S. T., Lee, B.Y., Kim, J. K.,&Kim,Y.Y. (2011). The effect of fibre distribution characteristics on the flexural strength of steel fibre-reinforced ultra high strength concrete. Construction and Building Materials, 25(5), 2450-2457. https://doi.org/10.1016/j.conbuildmat.2010.11.057
  5. Kim, H. K., Nam, I. W., & Lee, H. K. (2014). Enhanced effect of carbon nanotube on mechanical and electrical properties of cement composites by incorporation of silica fume. Composite Structures, 107, 60-69. https://doi.org/10.1016/j.compstruct.2013.07.042
  6. Konsta-Gdoutos, M. S., Metaxa, Z. S., & Shah, S. P. (2010). Highly dispersed carbon nanotube reinforced cement based materials. Cement and Concrete Research, 40(7), 1052-1059. https://doi.org/10.1016/j.cemconres.2010.02.015
  7. Lee, B. Y., Kim, J. K., Kim, J. S., & Kim, Y. Y. (2009). Quantitative evaluation technique of polyvinyl alcohol (PVA) fiber dispersion in engineered cementitious composites. Cement and Concrete Composites, 31(6), 408-417. https://doi.org/10.1016/j.cemconcomp.2009.04.002
  8. Lee, Y. H., Lee, S. W., Youn, J. R., Chung, K., & Kang, T. J. (2002). Characterization of fiber orientation in short fiber reinforced composites with an image processing technique. Materials Research Innovations, 6, 65-72. https://doi.org/10.1007/s10019-002-0180-8
  9. Li, J., Ma, P. C., Chow, W. S., To, C. K., Tang, B. Z., & Kim, J. K. (2007). Correlations between percolation threshold, dispersion state, and aspect ratio of carbon nanotubes. Advanced Functional Materials, 17(16), 3207-3215. https://doi.org/10.1002/adfm.200700065
  10. Li, H., Xiao, H., & Ou, J. (2006). Effect of compressive strain on electrical resistivity of carbon black-filled cement-based composites. Cement & Concrete Composites, 28(9), 824-828. https://doi.org/10.1016/j.cemconcomp.2006.05.004
  11. Liu, J., Li, C., Liu, J., Du, Z., & Cui, G. (2011). Characterization of fiber distribution in steel fiber reinforced cementitious composites with low water-binder ratio. Indian Journal of Engineering and Materials Sciences, 18, 449-457.
  12. Nam, I. W., Kim, H. K., & Lee, H. K. (2012). Influence of silica fume additions on electromagnetic interference shielding effectiveness of multi-walled carbon nanotube/cement composites. Construction and Building Materials, 30, 480-487. https://doi.org/10.1016/j.conbuildmat.2011.11.025
  13. Nam, I. W., Souri, H., Lee, H. K. (2015). Percolation threshold and piezoresistive response of multi-wall carbon nanotube/cement composites. Smart Structures and Systems (in review).
  14. Otsu, N. (1979). A threshold selection method from gray-level histograms. IEEE Transactions on Systems, Man, and Cybernetics, 9(1), 62-66. https://doi.org/10.1109/TSMC.1979.4310076
  15. Ozyurt, N., Woo, L. Y., Mason, T. O., & Shah, S. P. (2006). Monitoring fiber dispersion in fiber-reinforced cementitious materials: Comparison of AC-Impedance Spectroscopy and Image Analysis. ACI Materials Journal, 103(5), 340-347.
  16. Redon, C., Chermant, L., Chermant, J. L., & Coster, M. (1999). Automatic image analysis and morphology of fibre reinforced concrete. Cement & Concrete Composites, 21(5-6), 403-412. https://doi.org/10.1016/S0958-9465(99)00025-6
  17. SEMI MF 43 (2005) Standard test methods for resistivity of semiconductor materials.
  18. Sorensen, C., Berge, E., & Nikolaisen, E. B. (2014). Investigation of fiber distribution in concrete batches discharged from ready-mix truck. International Journal of Concrete Structures and Materials, 8(4), 279-287. https://doi.org/10.1007/s40069-014-0083-2
  19. Stauffer, D., & Aharony, A. (1994). Introduction to percolation theory Revised (2nd ed.). London, UK: Taylor & Francis.
  20. Striolo, A., Chialvo, A. A., Gubbins, K. E., & Cummings, P. T. (2005). Water in carbon nanotubes: Adsorption isotherms and thermodynamic properties from molecular simulation. The Journal of Chemical Physics, 122(23), 234712. https://doi.org/10.1063/1.1924697
  21. Vance, K., Aguayo, M., Dakhane, A., Ravikumar, D., Jain, J., & Neithalath, N. (2014). Microstructural, mechanical, and durability related similarities in concretes based on OPC and alkali-activated slag binders. International Journal of Concrete Structures and Materials, 8(4), 289-299. https://doi.org/10.1007/s40069-014-0082-3
  22. Wen, S., & Chung, D. D. L. (2007). Double percolation in the electrical conduction in carbon fiber reinforced cement-based materials. Carbon, 45(2), 263-267. https://doi.org/10.1016/j.carbon.2006.09.031
  23. Xie, P., Gu, P., & Beaudoin, J. J. (1996). Electrical percolation phenomena in cement composites containing conductive fibres. Journal of Materials Science, 31(15), 4093-4097. https://doi.org/10.1007/BF00352673

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