Effects of different kinds of carbon black nanoparticles on the piezoresistive and mechanical properties of cement-based composites

Nalon, Gustavo Henrique; Ribeiro, José Carlos Lopes; Araújo, Eduardo Nery Duarte de; Pedroti, Leonardo Gonçalves; Santos, Rodrigo Felipe; Aparecido-Ferreira, Alex

doi:10.1016/j.jobe.2020.101724

Cited by 35 publications

(21 citation statements)

References 47 publications

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“…The biphasic DC electrical measurement approach was used in this study to avoid the polarization effects [ 41 ]. The biphasic DC method is an effective technique to determine fractional changes in the electrical resistance of cementitious composites [ 41 , 42 ].…”

Section: Methodsmentioning

confidence: 99%

“…Equation (1) was used to calculate the electric current (I) flowing in this circuit, where V ( ref ) is the voltage drop across the reference resistor and R ( ref ) is the electrical resistance of this resistor (1000 Ω). Due to the complete polarization of the composite, the electrical current (I) achieved a plateau, and the electrical resistance R ( comp ) was calculated using Equation (2) [ 41 , 42 ].

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Section: Methodsmentioning

confidence: 99%

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Effects of Electrodes Layout and Filler Scale on Percolation Threshold and Piezoresistivity Performances of a Cementitious-Based Geocomposite

2022

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An extensive experimental study was conducted to investigate the co-effects of surface area and distance between electrodes as well as filler scales on the percolation threshold of piezoresistive cement-stabilised sand. In this route, the electrical resistivity of numerous specimens of different sizes and composed of different content of carbon-based conductive fillers was measured, including carbon nanotubes (CNTs), graphene nanoplatelets (GNPs), and carbon fibres (CFs) with different aspect ratios. In addition, the numerical relations between the electrical percolation threshold and matrix dimensions were expressed for different conductive fillers. Furthermore, the electrical percolation threshold of two large-scale specimens with different shapes (a 10 × 10 × 85 cm3 beam, and a 15 cm size cube) were predicted through numerical relations, and their piezoresistivity performances were investigated under compression cyclic loading (cube) and flexural cyclic loading (beam). The mechanical properties of the specimens were also evaluated. The results showed that the changes in the length, width, and thickness of the matrix surrounded between electrodes had a significant effect on the electrical percolation threshold. However, the effects of length changes on the percolation threshold were greater than the width and thickness changes. Generally, increasing the aspect ratio of the conductive fillers caused a reduction in the electrical percolation threshold of the cementitious geocomposite. The appropriate piezoresistivity response of the large-scale specimens composed of filler content equal to their percolation threshold (obtained by the numerical relation presented in this study) showed the adequacy of the results in terms of threshold dosage prediction and self-sensing geocomposite design. The results of this study addressed a crucial factor for the design of self-sensing composites and pave the way for the development of field-applicable, smart, cementitious geocomposite.

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Section: Methodsmentioning

confidence: 99%

…”

Section: Methodsmentioning

confidence: 99%

Effects of Electrodes Layout and Filler Scale on Percolation Threshold and Piezoresistivity Performances of a Cementitious-Based Geocomposite

2022

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“…The setting of favorable conditions for effective hydration can be reached by the application of ultrafine additives with high surface activity caused by their small size. Among such additives, it is possible to mention carbon-based nanomaterials such as carbon black [14][15][16][17], isostatic graphite [18][19][20], graphene oxide [21,22], graphene nanoplatelets [23,24], carbon nanotubes [25][26][27], and carbon fibers [28,29]. The listed additives possess several unique properties, such as high surface energy, mechanical strength, and electrical conductivity.…”

Section: Introductionmentioning

confidence: 99%

“…The listed additives possess several unique properties, such as high surface energy, mechanical strength, and electrical conductivity. The application of such additives for the modification of composites provides an improvement in the structure of the binding matrix and, consequently, leads to the improvement of different composite properties [14][15][16][17][18][19][20][21][22][23][24][25][26][27][28][29].…”

Section: Introductionmentioning

confidence: 99%

“…Carbon black (CB) is a prospective additive for the design of concrete with selfsensing abilities. Monteiro et al [14], Nalon et al [15], and Dong et al [16] established the improvement of electrical properties of cement composites with CB, whereas the mechanical properties, as well as microstructure, were not deeply investigated. The study of the mechanical properties of modified cement mortar was carried out by Yakovlev et al [17].…”

Section: Introductionmentioning

confidence: 99%

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Effect of Ultrafine Additives on the Morphology of Cement Hydration Products

et al. 2021

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The present research is focused on the investigation of the influence of ultrafine additives on the structure formation of hardened cement paste and the establishment of the mechanisms of the morphological transformations, which determine the properties of hydrated products. In the course of the research, the modification of ordinary Portland cement was performed by the suspension of multi-walled carbon nanotubes (MWCNTs), carbon black (CB) paste, and silica fume (SF). Scanning electron microscopy (SEM), energy-dispersive X-ray (EDX) microanalysis, X-ray diffraction (XRD) analysis, thermal analysis, and Fourier-transform infrared (FTIR) spectroscopy were used to study cement hydration products. The morphology of hardened cement paste depends on the chemical reactivity of additives, their geometry, and their genesis. The action mechanism of the inert carbon-based additives and pozzolanic silica fume were considered. The cement hydration products formed in the process of modification by both types of ultrafine additives are described. In the case of the modification of cement paste by inert MWCNTs and CB paste, the formation of cement hydration products on their surface without strong adhesion was observed, whereas in the case of the addition of SF separately and together with MWCNTs, the strong adhesion of additives and cement hydration products was noted.

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Smart cement‐sensor composite: The evolution of nanomaterial in developing sensor for structural integrity

Kanagasundaram

Elavenil

2023

Structural Concrete

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The integration of self‐sensing ability and different functional properties of nanomaterials into construction materials leads to smart and multifunctional cementitious sensor composites. Significant evolution of the Structural Health Monitoring (SHM) has helped to elevate the life span and mitigate damages of the structure. Developing smart cementitious sensor composite with electrical properties as a parent element and embedding it in the structural components have proved to be advantageous in terms of evaluating the damages, monitoring the periodic health and life assessment of the structures. In this review, the copious development processes and various methods of designing smart‐sensing cementitious composites have been scrutinized. This work recapitulates the principle of self‐sensing technique, typical functional fillers, trends of percolation threshold, dispersing material, dispersion technology, and also describes the required sensing ability of the sensors using the conduction theory. Subsequently application of smart cement‐sensors in structural components for SHM is discussed. In addition, this review article provides comprehensive information on the effects of nano materials and their dispersion in the development for smart and multifaceted cementitious sensor composites with enhanced sensitivity parameters and economic benefits that are suitable for future prospects.

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Effects of different kinds of carbon black nanoparticles on the piezoresistive and mechanical properties of cement-based composites

Cited by 35 publications

References 47 publications

Effects of Electrodes Layout and Filler Scale on Percolation Threshold and Piezoresistivity Performances of a Cementitious-Based Geocomposite

Effects of Electrodes Layout and Filler Scale on Percolation Threshold and Piezoresistivity Performances of a Cementitious-Based Geocomposite

Effect of Ultrafine Additives on the Morphology of Cement Hydration Products

Smart cement‐sensor composite: The evolution of nanomaterial in developing sensor for structural integrity

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