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dc.creatorMendoza Reales O.A., Arias Jaramillo Y.P., Ochoa Botero J.C., Delgado C.A., Quintero J.H., Toledo Filho R.D.spa
dc.date.accessioned2018-04-13T16:35:28Z
dc.date.available2018-04-13T16:35:28Z
dc.date.created2018
dc.identifier.issn88846
dc.identifier.urihttp://hdl.handle.net/11407/4576
dc.description.abstractThis 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. © 2018 Elsevier Ltdeng
dc.language.isoeng
dc.publisherElsevier Ltdspa
dc.relation.isversionofhttps://www.scopus.com/inward/record.uri?eid=2-s2.0-85042181283&doi=10.1016%2fj.cemconres.2018.02.020&partnerID=40&md5=d10388eff27dd4642ff05fdcb4831a7fspa
dc.sourceScopusspa
dc.titleInfluence of MWCNT/surfactant dispersions on the rheology of Portland cement pastesspa
dc.typeArticleeng
dc.rights.accessrightsinfo:eu-repo/semantics/restrictedAccess
dc.contributor.affiliationUniversidade Federal do Rio de Janeiro, Brazil; Universidad Nacional de Colombia, Colombia; Universidad de Medellín, Colombiaspa
dc.identifier.doi10.1016/j.cemconres.2018.02.020
dc.subject.keywordA. Dispersion; A. Hydration; A. Rheology; C. Adsorption; D. Carbon nanotubeseng
dc.subject.keywordCarbon; Cements; Chlorine compounds; Curve fitting; Elasticity; Hydration; Multiwalled carbon nanotubes (MWCN); Portland cement; Sodium dodecyl sulfate; Sulfur compounds; Surface active agents; Viscosity; X ray diffraction; Yarn; Yield stress; Aqueous dispersions; Bingham model; Cetylpyridinium Chloride; Hydration reaction; Interparticle attractions; Isothermal calorimetry; Portland cement paste; Rheological parameter; Dispersionseng
dc.publisher.facultyFacultad de Ciencias Básicasspa
dc.abstractThis 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. © 2018 Elsevier Ltdeng
dc.creator.affiliationMendoza Reales, O.A., Universidade Federal do Rio de Janeiro, Brazil; Arias Jaramillo, Y.P., Universidad Nacional de Colombia, Colombia; Ochoa Botero, J.C., Universidad Nacional de Colombia, Colombia; Delgado, C.A., Universidad de Medellín, Colombia; Quintero, J.H., Universidad de Medellín, Colombia; Toledo Filho, R.D., Universidade Federal do Rio de Janeiro, Brazilspa
dc.relation.ispartofesCement and Concrete Researchspa
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