Influence of MWCNT/surfactant dispersions on the rheology of Portland cement pastes

Oscar A. Mendoza Reales, Yhan Paul Arias Jaramillo, Juan Carlos Ochoa Botero, Carmen Alicia Delgado, Jorge Hernán Quintero, Romildo Dias Toledo Filho

Resultado de la investigación: Contribución a una revistaArtículo

18 Citas (Scopus)

Resumen

© 2018 Elsevier Ltd This work studies the effect of MWCNT/surfactant aqueous dispersions on the rheology of cement paste. Three types of surfactants (sodium dodecyl sulfate, cetylpyridinium chloride and triton TX-100) were used to prepare cement pastes with and without MWCNT. Three rheological parameters were determined for each sample: static yield stress, yield stress, and viscosity. The first was measured directly, while the other two were obtained by fitting a Bingham model to the descending portion of a flow curve. Additionally, X-ray diffraction and isothermal calorimetry were used to follow the hydration reaction of cement during the first hour. It was found that the MWCNT/surfactant dispersions generate an overall shift to higher yield stress values while maintaining viscosity, suggesting a modification of the interparticle attraction. It was concluded that the triple interaction MWCNT-surfactant-cement governs the rheology of cement pastes.
Idioma originalInglés estadounidense
Páginas (desde-hasta)101-109
Número de páginas9
PublicaciónCement and Concrete Research
DOI
EstadoPublicada - 1 may 2018

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    Mendoza Reales, O. A., Arias Jaramillo, Y. P., Ochoa Botero, J. C., Delgado, C. A., Quintero, J. H., & Toledo Filho, R. D. (2018). Influence of MWCNT/surfactant dispersions on the rheology of Portland cement pastes. Cement and Concrete Research, 101-109. https://doi.org/10.1016/j.cemconres.2018.02.020