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Naji, M. |
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Motta, Antonella |
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Aletan, Dirar |
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Mohamed, Tarek |
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Ertürk, Emre |
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Taccardi, Nicola |
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Kononenko, Denys |
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Petrov, R. H. | Madrid |
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Alshaaer, Mazen | Brussels |
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Bih, L. |
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Casati, R. |
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Muller, Hermance |
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Kočí, Jan | Prague |
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Šuljagić, Marija |
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Kalteremidou, Kalliopi-Artemi | Brussels |
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Azam, Siraj |
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Ospanova, Alyiya |
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Blanpain, Bart |
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Ali, M. A. |
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Popa, V. |
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Rančić, M. |
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Ollier, Nadège |
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Azevedo, Nuno Monteiro |
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Landes, Michael |
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Rignanese, Gian-Marco |
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Banfill, P. F. G.
Heriot-Watt University
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (19/19 displayed)
- 2019Rheology of lime pastes with biopolymer-based additivescitations
- 2016Rheology of natural hydraulic limes for masonry repair
- 2014Characterisation of rendering mortars by squeeze-flow and rotational rheometrycitations
- 2013Rheological and calorimetric behaviour of cements blended with containing ceramic sanitary ware and construction/demolition wastecitations
- 2013Rheological and calorimetric behaviour of cements blended with containing ceramic sanitary ware and construction/demolition wastecitations
- 2013Rheological behaviour of cements blended with containing ceramic wastes
- 2011Additivity effects in the rheology of fresh concrete containing water-reducing admixturescitations
- 2011Rheology and vibration of fresh concretecitations
- 2011Concentration effects in the rheology of cement pastes: Krieger-Dougherty revisited
- 2009Effect of activation conditions of a kaolinite based waste on rheology of blended cement pastescitations
- 2009Complex impedance and dielectric dispersion in carbon fiber reinforced cement matricescitations
- 2009Alkali activated fly ashcitations
- 2008Rheology of carbon fibre reinforced cement-based mortarcitations
- 2008Rheology and setting of alkali-activated slag pastes and mortars
- 2007Rheology and conduction calorimetry of cement modified with calcined paper sludgecitations
- 2007Improved superplasticisers for high performance concrete: the SUPERPLAST project
- 2007Impact of small amounts of swelling clays on the physical properties of debris-flow-like granular materials. Implications for the study of alpine debris flowcitations
- 2006Rheology of low carbon fibre content reinforced cement mortarcitations
- 2005Properties of alkali-activated fly ashes determined from rheological measurementscitations
Places of action
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article
Complex impedance and dielectric dispersion in carbon fiber reinforced cement matrices
Abstract
<p>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. © 2009 The American Ceramic Society.</p>