Microstructure and mechanical properties of carbon nanotube reinforced cementitious composites developed using a novel dispersion technique

Shama Parveen, Sohel Rana, Raul Fangueiro, Maria Conceição Paiva

Research output: Contribution to journalArticle

71 Citations (Scopus)

Abstract

The present paper reports the first attempt of developing carbon nanotube (CNT) reinforced cement composites through a short dispersion route using Pluronic F-127 as a novel dispersing agent. Optimum concentrations of Pluronic for various types of CNT were determined, and the influences of Pluronic and CNT on the microstructure and mechanical properties of cementitious composites were thoroughly investigated. Pluronic with optimized defoamer concentration significantly improved the bulk density and mechanical properties of cement mortar. Further, dispersion of 0.1% single walled nanotube (SWNT) improved flexural modulus of mortar by 72% and flexural and compressive strengths by 7% and 19%, respectively after 28 days of hydration. Flexural and compressive strengths with functionalized SWNT increased with the hydration period up to 17% and 23% after 56 days, respectively. All CNT reinforced samples exhibited significantly higher stiffness, fracture energy and ductility as compared to plain mortar and composite samples prepared using a common surfactant.

Original languageEnglish
Pages (from-to)215-227
Number of pages13
JournalCement and Concrete Research
Volume73
Early online date8 Apr 2015
DOIs
Publication statusPublished - Jul 2015
Externally publishedYes

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Poloxamer
Carbon Nanotubes
Carbon nanotubes
Mortar
Mechanical properties
Microstructure
Composite materials
Bending strength
Hydration
Nanotubes
Compressive strength
Cements
Fracture energy
Surface-Active Agents
Ductility
Surface active agents
Stiffness

Cite this

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abstract = "The present paper reports the first attempt of developing carbon nanotube (CNT) reinforced cement composites through a short dispersion route using Pluronic F-127 as a novel dispersing agent. Optimum concentrations of Pluronic for various types of CNT were determined, and the influences of Pluronic and CNT on the microstructure and mechanical properties of cementitious composites were thoroughly investigated. Pluronic with optimized defoamer concentration significantly improved the bulk density and mechanical properties of cement mortar. Further, dispersion of 0.1{\%} single walled nanotube (SWNT) improved flexural modulus of mortar by 72{\%} and flexural and compressive strengths by 7{\%} and 19{\%}, respectively after 28 days of hydration. Flexural and compressive strengths with functionalized SWNT increased with the hydration period up to 17{\%} and 23{\%} after 56 days, respectively. All CNT reinforced samples exhibited significantly higher stiffness, fracture energy and ductility as compared to plain mortar and composite samples prepared using a common surfactant.",
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Microstructure and mechanical properties of carbon nanotube reinforced cementitious composites developed using a novel dispersion technique. / Parveen, Shama; Rana, Sohel; Fangueiro, Raul; Paiva, Maria Conceição.

In: Cement and Concrete Research, Vol. 73, 07.2015, p. 215-227.

Research output: Contribution to journalArticle

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