Impedance spectroscopy of fiber-reinforced cement composites

Electrical and rheological properties of sewage sludge – Impact of the solid content

“…As commonly used in the literature, the samples electrical behavior can be modeled by equivalent circuits (Macdonald and Garber, 1977;Macdonald, 1992;Mason et al, 2002): the w a t e r r e s e a r c h 8 2 ( 2 0 1 5 ) 2 5 e3 6 circuit elements and connectivity are selected as far as possible to represent the physical processes thought to be of importance for the system.…”

Rheology of low carbon fibre content reinforced cement mortar

“…To fully realise its use as a smart material, CFRC must be capable of being moulded, compacted, extruded or otherwise formed. Additionally, it is recognised that there is a lower limiting concentration of the conductive fibre which needs to be exceeded in order to confer the desired electrical properties on CFRC, referred to as the percolation threshold, and values of 0.3-0.5% fibre volume concentration have been reported [4,[12][13][14][15][16]. Appropriate test methods, capable of testing the rheological properties of CFRC up to and above this threshold are required, and it is this aspect which is addressed in the current paper.…”

Distribution of fibers in SFRC segments for tunnel linings

“…Chung (2001) investigated the FRC properties during exposure to DC currents and attributed the variations in resistance to microstructural change, such as fiber slip, changes in alignment and/or fiber spacing, when subjected to static or dynamic loads. The electrical characterization method called alternating current -impedance spectroscopy (AC-IS) has proven to be effective in monitoring the fiber dispersion, as well as the fiber orientation, segregation and grouping (Manson et al, 2002;Woo et al, 2003).…”