The Effect of Carbon Nanotubes on the Flowability, Mechanical, Microstructural and Durability Properties of Cementitious Composite: An Overview

Adhikary, Suman Kumar; Rudžionis, Žymantas; Raja, Rajapriya

doi:10.3390/su12208362

Cited by 40 publications

(13 citation statements)

References 71 publications

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“…The most notable drop in porosity was obtained for the MOC-CNT-0.5 composite, whose porosity was decreased by approximately 19% compared to the reference material MOC-R. The total open porosity of MOC-R-1 was slightly higher than that of MOC-CNT-0.5, which was affected by the formation of CNT agglomerates during the material mixing and setting [53]. On the other hand, the porosity of MOC-CNT-1 was still about 5% lower in comparison with the control material.…”

Section: Resultsmentioning

confidence: 92%

Magnesium Oxychloride Cement Composites with MWCNT for the Construction Applications

et al. 2021

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In this contribution, composite materials based on magnesium oxychloride cement (MOC) with multi-walled carbon nanotubes (MWCNTs) used as an additive were prepared and characterized. The prepared composites contained 0.5 and 1 wt.% of MWCNTs, and these samples were compared with the pure MOC Phase 5 reference. The composites were characterized using a broad spectrum of analytical methods to determine the phase and chemical composition, morphology, and thermal behavior. In addition, the basic structural parameters, pore size distribution, mechanical strength, stiffness, and hygrothermal performance of the composites, aged 14 days, were also the subject of investigation. The MWCNT-doped composites showed high compactness, increased mechanical resistance, stiffness, and water resistance, which is crucial for their application in the construction industry and their future use in the design and development of alternative building products.

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Section: Resultsmentioning

confidence: 92%

Magnesium Oxychloride Cement Composites with MWCNT for the Construction Applications

et al. 2021

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“…CNTs are well known to improve the mechanical performance of the cementitious matrix. According to a recent review [ 38 ], the incorporation of CNTs in cement paste can result to a maximum improvement in the compressive and flexural strength of 83.33% [ 39 ] and 30% [ 34 ], respectively. In case of a mortar matrix, the percentages are dropping reaching a maximum of ~35% for the compressive strength [ 40 ] and 28.04% for the flexural strength [ 41 ].…”

Section: Nanomaterials Typically Used In Cement-based Materialsmentioning

confidence: 99%

Nanomaterials in Cementitious Composites: An Update

et al. 2021

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This review is an update about the addition of nanomaterials in cementitious composites in order to improve their performance. The most common used nanomaterials for cementitious materials are carbon nanotubes, nanocellulose, nanographene, graphene oxide, nanosilica and nanoTiO2. All these nanomaterials can improve the physical, mechanical, thermal and electrical properties of cementitious composites, for example increase their compressive and tensile strength, accelerate hydration, decrease porosity and enhance fire resistance. Cement based materials have a very complex nanostructure consisting of hydration products, crystals, unhydrated cement particles and nanoporosity where traditional reinforcement, which is at the macro and micro scale, is not effective. Nanomaterials can reinforce the nanoscale, which wasn’t possible heretofore, enhancing the performance of the cementitious matrix.

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“…The very high number of citations reveals the importance of this finding. Gao et al and Adhikary et al recently revised the mechanical properties and microstructure of cement-based materials searching for the best structure of the CNTs to its reinforcement [ 82 , 94 ]. A book by Guceri and Gogotsi from an ASI NATO meeting on nanofibrous materials is available [ 95 ].…”

Section: Cnts Application Areasmentioning

confidence: 99%

Kinetics of Carbon Nanotubes and Graphene Growth on Iron and Steel: Evidencing the Mechanisms of Carbon Formation

Lobo

Carabineiro

2021

Nanomaterials

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Carbon formation on steel has recently become an active research area with several important applications, using either carbon nanotubes (CNTs) or graphene structures. The production of vertically aligned CNT (VACNT) forests with combined metals has been explored with important results. Detailed kinetics is the best approach to understand a mechanism. The growth behavior seems complex but can be simplified through the knowledge of the three more common alternative reaction mechanisms/routes. The time required to optimize the production and properties might be reduced. The mechanistic proposal reported in 1971 was better explained recently. The volcano shape Arrhenius plot reported is observed only when Fe, Co, and Ni are used as reaction catalysts. Other metals are catalytically active at higher temperatures, following a different route, which does not require surface catalysis decomposition of the reactive gas. C2H2 and low olefins react well, but CH4 is not reactive via this surface catalysis route. Optimizing production of CNTs, research work is usually based on previous experience, but solid-state science-based studies are available.

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The Effect of Carbon Nanotubes on the Flowability, Mechanical, Microstructural and Durability Properties of Cementitious Composite: An Overview

Cited by 40 publications

References 71 publications

Magnesium Oxychloride Cement Composites with MWCNT for the Construction Applications

Magnesium Oxychloride Cement Composites with MWCNT for the Construction Applications

Nanomaterials in Cementitious Composites: An Update

Kinetics of Carbon Nanotubes and Graphene Growth on Iron and Steel: Evidencing the Mechanisms of Carbon Formation

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