AC-impedance response of multi-walled carbon nanotube/cement composites

By S. Wansom, N. Kidner, L. Woo, Thomas Mason. 2006

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Cement and Concrete Nanoscience and Nanotechnology (2010, background): “Although the researchers found significant improvements in DC electrical conductivity as compared to control samples, the measured values, on the order of 130–170 ohm-cm [71,72], fall far short of the level of conductivity that should be expected based on the level of loading of MWCNT in the samples”
Carbon Nanotubes and Carbon Nanofibers for Enhancing the Mechanical Properties of Nanocomposite Cementitious Materials (2011, background): “5 wt% by weight of cement (Cwirzen et al. 2008; Li et al. 2005; Li et al. 2007; Musso et al. 2009; Sáez de Ibarra et al. 2006; Wansom et al. 2006).”
Mechanical Properties of Nanocomposite Cement Incorporating Surface-Treated and Untreated Carbon Nanotubes and Carbon Nanofibers (2012, background): “Previous work (Tyson et al. 2009; Yazdanbakhsh et al. 2009) has shown that a commercial superplasticizer, a high-range polycarboxylate-based, water-reducing ADVA Cast 575 admixture from Grace Corporation, works well to disperse the nanofilaments with minimal effect on the hydration time of the…”
Multiwalled carbon nanotube/cement composites with exceptional electromagnetic interference shielding properties (2013, unknown): “The rac and d [36,37] can be related to imaginary permittivity (e00) and real permeability (l 0) as rAC = xeoe rdc and d 1⁄4 ffiffiffiffiffiffiffiffiffiffiffiffiffiffiffi 2=rxl0 p which gives absorption loss as:”