Electrical Properties of Cement-based Composites Containing Carbon Black Particles

Monteiro, André Oliveirinha; Cachim, Paulo; Costa, Pedro M. F. J.

doi:10.1016/j.matpr.2015.04.021

Cited by 45 publications

(24 citation statements)

References 13 publications

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“…While Lit et al used CB as the only conductive additive, their PCSS specimens showed good piezoresistive behaviour. However, the piezoresistivity was verified for very high CB concentrations which is detrimental for the mechanical response of the cement [37]. In an attempt to improve the previous results by Li et al, we investigate the piezoresistive response of cement-based composites containing lower CB loadings that can furthermore retain the mechanical strength of the cement matrix.…”

Section: Accepted Manuscriptmentioning

confidence: 88%

“…Self-sensing piezoresistive cement composite loaded with carbon black particles 3 nanotubes [12,[32][33][34], steel fibres [16,30,35] and CB [15,17,[36][37][38][39]. In particular, CB particles have demonstrated some advantages for SHM applications when compared with other conductive additives [37,40]. Top amongst these is their lower cost.…”

Section: Accepted Manuscriptmentioning

confidence: 99%

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Self-sensing piezoresistive cement composite loaded with carbon black particles

Monteiro

Cachim

Costa

2017

Cement and Concrete Composites

154

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Strain sensors can be embedded in civil engineering infrastructures to perform real-time service life monitoring. Here, the sensing capability of piezoresistive cement-based composites loaded with carbon black (CB) particles is investigated. Several composite mixtures, with a CB filler loading up to 10% of binder mass, were mechanically tested under cyclic uniaxial compression, registering variations in electrical resistance as a function of deformation. The results show a reversible piezoresistive behaviour and a quasi-linear relation between the fractional change in resistivity and the compressive strain, in particular for those compositions with higher amount of CB. Gage factors of 30 and 24 were found for compositions containing 7 and 10% of binder mass, respectively. These findings suggest that the CB-cement composites may be a promising active material to monitor compressive strain in civil infrastructures such as concrete bridges and roadways.

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Section: Accepted Manuscriptmentioning

confidence: 88%

Section: Accepted Manuscriptmentioning

confidence: 99%

Self-sensing piezoresistive cement composite loaded with carbon black particles

Monteiro

Cachim

Costa

2017

Cement and Concrete Composites

154

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show abstract

“…Finally, carbon nanomaterials gathered a lot of attention as they have, beyond high electrical conductivity, unique physical properties [16,29]. Among carbon nanomaterials employed in concrete composites we mention carbon black [30,31], carbon nanotubes [32][33][34][35] and nanofibers [36][37][38][39][40], as well as graphene nanoplatelets [41][42][43][44][45].…”

Section: Introductionmentioning

confidence: 99%

Elucidation of Conduction Mechanism in Graphene Nanoplatelets (GNPs)/Cement Composite Using Dielectric Spectroscopy

Goracci

Dolado

2020

Materials

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Understanding the mechanisms that govern the conductive properties of multifunctional cement-materials is fundamental for the development of the new applications proposed to enhance the energy efficiency, safety and structural properties of smart buildings and infrastructures. Many fillers have been suggested to increase the electrical conduction in concretes; however, the processes involved are still not entirely known. In the present work, we investigated the effect of graphene nanoplatelets (1 wt% on the electrical properties of cement composites (OPC/GNPs). We found a decrease of the bulk resistivity in the composite associated to the enhancement of the charge transport properties in the sample. Moreover, the study of the dielectric properties suggests that the main contribution to conduction is given by water diffusion through the porous network resulting in ion conductivity. Finally, the results support that the increase of direct current in OPC/GNPs is due to pore refinement induced by graphene nanoplatelets.

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“…One study showed that carbon black when added to concrete initially increases the compressive strength of the concrete of carbon black leads to a decrease in the compressive strength due to excess replacement of cementitious mateirals [50]. Figure 20: Effect of carbon black on the compressive strength of PCC [50] This was also seen in a composite of plain portland cement paste and carbon black of varying proportions, where carbon black-cement composites had a higher strength at low concentrations of carbon black but this strength decreased as the percentage of carbon black was increased [31].…”

Section: Chapter 2: Review Of Existing Literaturementioning

confidence: 99%

“…Effects of carbon black on the compressive strength (a) and tensile strength (b) of cement paste composite[31] The dispersion of conductive fillers and fibers in cement matrix is important in achieving the right material and electrical properties. The electrical properties can be a good measure of the dispersion of conductive particles in the cement matrix.…”

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confidence: 99%

Acceleration of percolation for cementitious sensors using conductive paint filler

Pinto

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Electrical Properties of Cement-based Composites Containing Carbon Black Particles

Cited by 45 publications

References 13 publications

Self-sensing piezoresistive cement composite loaded with carbon black particles

Self-sensing piezoresistive cement composite loaded with carbon black particles

Elucidation of Conduction Mechanism in Graphene Nanoplatelets (GNPs)/Cement Composite Using Dielectric Spectroscopy

Acceleration of percolation for cementitious sensors using conductive paint filler

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