Flowability and electrical properties of cement composites with mechanical dispersion of carbon nanotube

Tafesse, Million; Lee, Nam Kon; Alemu, Abel Shiferaw; Lee, Hyo Kyoung; Kim, Sung Wook; Kim, Hyeong-Ki

doi:10.1016/j.conbuildmat.2021.123436

Cited by 29 publications

(10 citation statements)

References 46 publications

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“…Further, SWCNTs accelerated the C 3 S hydration rate in the cement paste. Tafesse et al [107] also confirmed a decrease in flowability with the incorporation of CNTs into the cement matrix and revealed that the flowability was dependent on the type of CNTs that was used. Kim et al [84] studied the plastic viscosity and yield stress of cement composites with SWCNTs using a compact modular rheometer.…”

Section: Fresh Properties Of Concrete With Cbnsmentioning

confidence: 92%

“…Meanwhile, a few studies mixed CBNs together with dry ingredients followed by the addition of aqueous solutions. Tafesse et al [107] adopted a one-step mixing technique of all solid ingredients including CNTs without any sonication. The dry ingredients were initially mixed for 5 min., followed by the addition of mixture water and SP to develop CNT/cement composites.…”

Section: R E V I E W T H E C H E M I C a L R E C O R Dmentioning

confidence: 99%

“…The hybrid CNF/CF (0.01 wt.% 19 LHT type) composite exhibited better piezo resistivity performance with increased sensitivity, good stability, and repeatability with 80 % fractional change in resistivity (FCR) of the composite compared to the mono CNF with only 50 % FCR. Tafesse et al [107] reported that the electrical resistivity of cement composites with CNTs was highly dependent on the type of CNTs, the electrical resistivity of the CNTs, their dispersion, and the flowability of the cement composites. The decrease in flowability due to the addition of CNTs decreased the electrical resistivity of the CNT/cement composites.…”

Section: Electrical and Piezo Resistivitymentioning

confidence: 99%

“…As discussed in chapter 4, the 3D printable concrete extruded from the nozzle is much stiffer than conventional concrete, indicating a lower slump/flow value compared to normal concrete. In this regard, as the CBNs have a tendency to reduce the fluidity of the concrete mixture, [80,97,107] they are suitable materials to adjust the slump requirements of 3DCP, besides enhancing the microstructure by filling the micro-nano pores in the cement matrix. Wang et al [210] performed slump and flow table tests to determine the printability and buildability characteristics, i. e. viscosity, workability, and static yield stress of self-sensing 3D printable cement composites with CF and ACP as functional fillers.…”

Section: Workabilitymentioning

confidence: 99%

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Cement Composites with Carbon‐Based Nanomaterials for 3D Concrete Printing Applications – A Review

Basha

Rehman

Aziz

et al. 2023

The Chemical Record

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3D concrete printing (3DCP) is an emerging additive manufacturing technology in the construction industry. Its challenges lie in the development of high‐performance printable materials and printing processes. Recently developed carbon‐based nanomaterials (CBNs) such as graphene, graphene oxide, graphene nanoplatelets, and carbon nanotubes, have various applications due to their exceptional mechanical, chemical, thermal, and electrical characteristics. CBNs also have found potential applications as a concrete ingredient as they enhance the microstructure and modify concrete properties at the molecular level. This paper focuses on state‐of‐the‐art studies on CBNs, 3DCP technology, and CBNs in conventional and 3D printable cement‐based composites including CBN dispersion techniques, concrete mixing methods, and fresh and hardened properties of concrete. Furthermore, the current limitations and future perspectives of 3DCP using CBNs to produce high‐quality composite mixtures are discussed.

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Section: Fresh Properties Of Concrete With Cbnsmentioning

confidence: 92%

Section: R E V I E W T H E C H E M I C a L R E C O R Dmentioning

confidence: 99%

Section: Electrical and Piezo Resistivitymentioning

confidence: 99%

Section: Workabilitymentioning

confidence: 99%

See 2 more Smart Citations

Cement Composites with Carbon‐Based Nanomaterials for 3D Concrete Printing Applications – A Review

Basha

Rehman

Aziz

et al. 2023

The Chemical Record

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show abstract

“…190 This method of fabrication established without sonic treatment has poor flowability and the agglomerates of the nanofillers were not dispersed properly. 191 The physico-mechanical technique produces synergistic effect of silica fume while ultrasonication produces physical shock to the filler bundles, which in turn tends to improve the dispersion. 192 One of the studies found that sonication process alone is not sufficient for dispersing GNP in water and thus necessitates the combination of mechanical and surfactant treatments for homogeneous dispersion.…”

Section: Process and Methods Of Dispersion Technologymentioning

confidence: 99%

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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Enhancing the electrochemical performance of Portland cement supercapacitor by decorating electrolyte with metal salt solution

Chen,

Liu,

Cui

et al. 2023

J. Korean Ceram. Soc.

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Flowability and electrical properties of cement composites with mechanical dispersion of carbon nanotube

Cited by 29 publications

References 46 publications

Cement Composites with Carbon‐Based Nanomaterials for 3D Concrete Printing Applications – A Review

Cement Composites with Carbon‐Based Nanomaterials for 3D Concrete Printing Applications – A Review

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

Enhancing the electrochemical performance of Portland cement supercapacitor by decorating electrolyte with metal salt solution

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