Reinforcing Effect of Carbon Nanotubes/Surfactant Dispersions in Portland Cement Pastes

Oscar A. Mendoza Reales, Caterin Ocampo, Yhan Paul Arias Jaramillo, Juan Carlos Ochoa Botero, Jorge Hernán Quintero, Emílio C.C.M. Silva, Romildo Dias Toledo Filho

Resultado de la investigación: Contribución a una revistaArtículo

1 Cita (Scopus)

Resumen

© 2018 Oscar A. Mendoza Reales et al. Decoupling the individual effects of multiwalled carbon nanotubes (MWCNTs) and surfactants when used as reinforcement materials in cement-based composites is aimed in this study. Powder MWCNTs were dispersed in deionized water using different types of surfactants as chemical dispersing agents and an ultrasonic tip processor. Cement pastes with carbon nanotubes additions of 0.15% by mass of cement were produced in two steps: first, the MWCNT/surfactant dispersions were combined with the mixing water, and then, cement was added and mixed until a homogeneous paste was obtained. Mechanical properties of the pastes cured at 7 days were measured, and their fracture behavior was characterized using the linear elastic finite element analysis. It was found that the reinforcing effect of MWCNT was masked by the negative effect of surfactants in the cement matrix; nevertheless, nanotubes were capable of increasing both stress and strain capacity of the composite by controlling the crack propagation process at the tip of the crack.
Idioma originalInglés estadounidense
PublicaciónAdvances in Civil Engineering
DOI
EstadoPublicada - 1 ene 2018

Huella dactilar

Portland cement
Dispersions
Multiwalled carbon nanotubes (MWCN)
Carbon nanotubes
Cements
Surface active agents
Deionized water
Composite materials
Nanotubes
Crack propagation
Reinforcement
Ultrasonics
Cracks
Finite element method
Powders
Mechanical properties
Water

Citar esto

Mendoza Reales, O. A., Ocampo, C., Arias Jaramillo, Y. P., Ochoa Botero, J. C., Quintero, J. H., Silva, E. C. C. M., & Toledo Filho, R. D. (2018). Reinforcing Effect of Carbon Nanotubes/Surfactant Dispersions in Portland Cement Pastes. Advances in Civil Engineering. https://doi.org/10.1155/2018/2057940
Mendoza Reales, Oscar A. ; Ocampo, Caterin ; Arias Jaramillo, Yhan Paul ; Ochoa Botero, Juan Carlos ; Quintero, Jorge Hernán ; Silva, Emílio C.C.M. ; Toledo Filho, Romildo Dias. / Reinforcing Effect of Carbon Nanotubes/Surfactant Dispersions in Portland Cement Pastes. En: Advances in Civil Engineering. 2018.
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author = "{Mendoza Reales}, {Oscar A.} and Caterin Ocampo and {Arias Jaramillo}, {Yhan Paul} and {Ochoa Botero}, {Juan Carlos} and Quintero, {Jorge Hern{\'a}n} and Silva, {Em{\'i}lio C.C.M.} and {Toledo Filho}, {Romildo Dias}",
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Mendoza Reales, OA, Ocampo, C, Arias Jaramillo, YP, Ochoa Botero, JC, Quintero, JH, Silva, ECCM & Toledo Filho, RD 2018, 'Reinforcing Effect of Carbon Nanotubes/Surfactant Dispersions in Portland Cement Pastes', Advances in Civil Engineering. https://doi.org/10.1155/2018/2057940

Reinforcing Effect of Carbon Nanotubes/Surfactant Dispersions in Portland Cement Pastes. / Mendoza Reales, Oscar A.; Ocampo, Caterin; Arias Jaramillo, Yhan Paul; Ochoa Botero, Juan Carlos; Quintero, Jorge Hernán; Silva, Emílio C.C.M.; Toledo Filho, Romildo Dias.

En: Advances in Civil Engineering, 01.01.2018.

Resultado de la investigación: Contribución a una revistaArtículo

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T1 - Reinforcing Effect of Carbon Nanotubes/Surfactant Dispersions in Portland Cement Pastes

AU - Mendoza Reales, Oscar A.

AU - Ocampo, Caterin

AU - Arias Jaramillo, Yhan Paul

AU - Ochoa Botero, Juan Carlos

AU - Quintero, Jorge Hernán

AU - Silva, Emílio C.C.M.

AU - Toledo Filho, Romildo Dias

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AB - © 2018 Oscar A. Mendoza Reales et al. Decoupling the individual effects of multiwalled carbon nanotubes (MWCNTs) and surfactants when used as reinforcement materials in cement-based composites is aimed in this study. Powder MWCNTs were dispersed in deionized water using different types of surfactants as chemical dispersing agents and an ultrasonic tip processor. Cement pastes with carbon nanotubes additions of 0.15% by mass of cement were produced in two steps: first, the MWCNT/surfactant dispersions were combined with the mixing water, and then, cement was added and mixed until a homogeneous paste was obtained. Mechanical properties of the pastes cured at 7 days were measured, and their fracture behavior was characterized using the linear elastic finite element analysis. It was found that the reinforcing effect of MWCNT was masked by the negative effect of surfactants in the cement matrix; nevertheless, nanotubes were capable of increasing both stress and strain capacity of the composite by controlling the crack propagation process at the tip of the crack.

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Mendoza Reales OA, Ocampo C, Arias Jaramillo YP, Ochoa Botero JC, Quintero JH, Silva ECCM y otros. Reinforcing Effect of Carbon Nanotubes/Surfactant Dispersions in Portland Cement Pastes. Advances in Civil Engineering. 2018 ene 1. https://doi.org/10.1155/2018/2057940