Reinforcing Effect of Carbon Nanotubes/Surfactant Dispersions in Portland Cement Pastes
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...
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| Main Authors: | , , , , , , |
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| Format: | Article |
| Language: | English |
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Wiley
2018-01-01
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| Series: | Advances in Civil Engineering |
| Online Access: | http://dx.doi.org/10.1155/2018/2057940 |
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| _version_ | 1832566535192838144 |
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| author | 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 |
| author_facet | 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 |
| author_sort | Oscar A. Mendoza Reales |
| collection | DOAJ |
| description | 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. |
| format | Article |
| id | doaj-art-4b0e53fb19774422a26d334829724fc5 |
| institution | Kabale University |
| issn | 1687-8086 1687-8094 |
| language | English |
| publishDate | 2018-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | Advances in Civil Engineering |
| spelling | doaj-art-4b0e53fb19774422a26d334829724fc52025-02-03T01:03:49ZengWileyAdvances in Civil Engineering1687-80861687-80942018-01-01201810.1155/2018/20579402057940Reinforcing Effect of Carbon Nanotubes/Surfactant Dispersions in Portland Cement PastesOscar A. Mendoza Reales0Caterin Ocampo1Yhan Paul Arias Jaramillo2Juan Carlos Ochoa Botero3Jorge Hernán Quintero4Emílio C. C. M. Silva5Romildo Dias Toledo Filho6Universidade Federal do Rio de Janeiro, Rio de Janeiro, RJ, BrazilUniversidad Nacional de Colombia, Medellín, ColombiaUniversidad Nacional de Colombia, Medellín, ColombiaUniversidad Nacional de Colombia, Medellín, ColombiaUniversidad de Medellín, Medellín, ColombiaPetrobras Petróleo Brasileiro S.A., Rio de Janeiro, RJ, BrazilUniversidade Federal do Rio de Janeiro, Rio de Janeiro, RJ, BrazilDecoupling 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.http://dx.doi.org/10.1155/2018/2057940 |
| spellingShingle | 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 Reinforcing Effect of Carbon Nanotubes/Surfactant Dispersions in Portland Cement Pastes Advances in Civil Engineering |
| title | Reinforcing Effect of Carbon Nanotubes/Surfactant Dispersions in Portland Cement Pastes |
| title_full | Reinforcing Effect of Carbon Nanotubes/Surfactant Dispersions in Portland Cement Pastes |
| title_fullStr | Reinforcing Effect of Carbon Nanotubes/Surfactant Dispersions in Portland Cement Pastes |
| title_full_unstemmed | Reinforcing Effect of Carbon Nanotubes/Surfactant Dispersions in Portland Cement Pastes |
| title_short | Reinforcing Effect of Carbon Nanotubes/Surfactant Dispersions in Portland Cement Pastes |
| title_sort | reinforcing effect of carbon nanotubes surfactant dispersions in portland cement pastes |
| url | http://dx.doi.org/10.1155/2018/2057940 |
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