Resistance heating using electrically conductive cements

Wang, S.; Wen, Sihai; Chung, D.D.L.

doi:10.1680/adcr.16.4.161.46662

Cited by 16 publications

(18 citation statements)

References 17 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Teomete et al [22] observed that the highest gauge factor (which is defined as the ratio of fractional change in electrical resistivity to splitting tensile strain) of copper coated steel fiber (length of 6mm) reinforced cement-based composite under tensile strain is 5195, 2600 times higher than that of commercial metal strain gages, but the diameter of the steel fiber was not mentioned. Except for strain sensing [23], the micro steel/stainless fiber reinforced concrete is more effective for electrical grounding, electromagnetic interference and deicing [24]. Wen et al [25] found that the EMI shielding effectiveness of cement paste with 0.72 vol.% of stainless steel fibers (diameter of 8 μm and length of 6 mm) reaches up to 70 dB at 1.5 GHz.…”

Section: Introductionmentioning

confidence: 99%

Electrically conductive behaviors and mechanisms of short-cut super-fine stainless wire reinforced reactive powder concrete

Dong

Han

et al. 2016

Cement and Concrete Composites

131

View full text Add to dashboard Cite

The incorporation of shortcut super-fine stainless wire (SSSW) is an effective way to improve the electrically conductive and self-sensing capability of reactive powder concrete (RPC) composed of cement, silica fume, fly ash and silica sand. The conductive characteristics of SSSW reinforced RPC and their responses to external loading are investigated. The conductive mechanisms are revealed through electrochemical impedance spectroscopy and intrinsic conductivity analysis. The results show that the percolation occurs and polarization disappears in SSSW reinforced RPC containing 0.5 vol.% of SSSW in diameter of 20 μm, and the electrical resistivity of which measured by using four-electrode-DC method drops to 44 Ω•cm from 20.8×10 4 Ω•cm. The gauge factor of RPC reinforced with SSSW in diameter of 8 μm can reach up to 22.5, 94.9 and 43.6 under cyclic compression, monotonic compression and flexure, respectively. The conductivity of SSSW reinforced RPC mainly depends on the formation of SSSW conductive network.

show abstract

Section: Introductionmentioning

confidence: 99%

Electrically conductive behaviors and mechanisms of short-cut super-fine stainless wire reinforced reactive powder concrete

Dong

Han

et al. 2016

Cement and Concrete Composites

131

View full text Add to dashboard Cite

show abstract

“…They are, however, poor conductors of electricity and the addition of short fibers, such as carbon or steel, can make these materials electrically conductive. This could open up a diverse range of nonstructural applications; e.g., conductive fiber cement matrices could find general application in electrical grounding, static charge dissipation, electrical resistance heating, and cathodic protection systems in reinforced concrete structures [1][2][3] ; by utilizing its piezoresistive properties, these materials also possess self-monitoring capabilities with respect to deformation and damage under static and dynamic loading. [4][5][6][7][8] Work on conductive fiber cement-based systems has, in the main, utilized the d.c. or low-frequency electrical conductivity/ resistivity of the material.…”

Section: Introductionmentioning

confidence: 99%

Complex Impedance and Dielectric Dispersion in Carbon Fiber Reinforced Cement Matrices

McCarter

Starrs

Chrisp

et al. 2009

Journal of the American Ceramic Society

View full text Add to dashboard Cite

The electrical response of carbon fiber reinforced cement mortar over the frequency range 1 Hz–10MHz has been presented. The low frequency conductivity is shown to be directly influenced by increasing fiber dosage, with conductivity percolation occurring at dosages in the range 0.35%–1.0% (by volume). When viewed across the entire frequency spectrum, the conductivity and dielectric constant frequency dispersions reveal two regions of relaxation. The definition of these regions becomes more pronounced as the fiber dosage is increased. It is proposed that the low frequency relaxation process (1 Hz–1 kHz) is related to the enhanced charge transfer characteristics at the electrode–material interface produced by the presence of the carbon fibers in the vicinity of the electrodes. The high frequency relaxation process (5 kHz–10 MHz) results from a Maxwell–Wagner effect produced by the presence of highly conducting inclusions (the carbon fibers) in the low conductivity mortar matrix.

show abstract

“…bridges, pressure vessels) [7]. Other areas where CFRC could find practical application include: electrically conductive cementitious overlays for heating applications [8,9]; as an effective, durable low-resistance grounding-system [10] for earthing electrical installations or preventing static electricity build-up; as an overlay in cathodic protection systems providing a more uniform current distribution, or in structures where electromagnetic shielding or screening is required [11].…”

Section: Introductionmentioning

confidence: 99%