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dc.creatorRodríguez B., Quintero J.H., Arias Y.P., Mendoza-Reales O.A., Ochoa-Botero J.C., Toledo-Filho R.D.spa
dc.date.accessioned2018-04-13T16:34:43Z
dc.date.available2018-04-13T16:34:43Z
dc.date.created2017
dc.identifier.issn17426588
dc.identifier.urihttp://hdl.handle.net/11407/4567
dc.description.abstractThis work studies the reinforcing effect of Multi Walled Carbon Nanotubes (MWCNT) on cement pastes. A 0.35% solid concentration of MWCNT in powder was dispersed in deionized water with sodium dodecyl sulfate (cationic surfactant), cetylpyridinium chloride (anionic surfactant) and triton X-100 (amphoteric surfactant) using an ultrasonic tip processor. Three concentrations of each surfactant (1mM, 10mM and 100mM) were tested, and all samples were sonicated until an adequate dispersion degree was obtained. Cement pastes with additions of carbon nanotubes of 0.15% by mass of cement were produced in two steps; first the dispersions of MWCNT were combined with the mixing water using an ultrasonic tip processor to guarantee homogeneity, and then cement was added and mixed until a homogeneous paste was obtained. Direct tensile strength, apparent density and open porosity of the pastes were measured after 7 days of curing. It was found that the MWCNT/surfactants dispersions decrease the mechanical properties of the cement based matrix due to an increased porosity caused by the presence of surfactants. © Published under licence by IOP Publishing Ltd.eng
dc.language.isoeng
dc.publisherInstitute of Physics Publishingspa
dc.relation.isversionofhttps://www.scopus.com/inward/record.uri?eid=2-s2.0-85041408034&doi=10.1088%2f1742-6596%2f935%2f1%2f012014&partnerID=40&md5=7d6c8de4e3223c9c2dfc0c681a557734spa
dc.sourceScopusspa
dc.titleInfluence of MWCNT/surfactant dispersions on the mechanical properties of Portland cement pastesspa
dc.typeConference Papereng
dc.rights.accessrightsinfo:eu-repo/semantics/restrictedAccess
dc.contributor.affiliationUniversidad de Medellín, Medellín, Colombia; Universidad Nacional de Colombia, Medellín, Colombia; Universidade Federal Do Rio de Janeiro, Rio de Janeiro, Brazilspa
dc.identifier.doi10.1088/1742-6596/935/1/012014
dc.subject.keywordAmphoteric surfactants; Anionic surfactants; Carbon; Carbon nanotubes; Cationic surfactants; Cements; Chlorine compounds; Deionized water; Dispersions; Dyes; Mechanical properties; Nanotubes; Porosity; Portland cement; Sodium dodecyl sulfate; Sodium sulfate; Sulfur compounds; Surface active agents; Tensile strength; Yarn; Apparent density; Cement-based matrices; Cetylpyridinium Chloride; Direct tensile strengths; Dispersion degree; Portland cement paste; Reinforcing effects; Solid concentrations; Multiwalled carbon nanotubes (MWCN)eng
dc.publisher.facultyFacultad de Ciencias Básicasspa
dc.abstractThis work studies the reinforcing effect of Multi Walled Carbon Nanotubes (MWCNT) on cement pastes. A 0.35% solid concentration of MWCNT in powder was dispersed in deionized water with sodium dodecyl sulfate (cationic surfactant), cetylpyridinium chloride (anionic surfactant) and triton X-100 (amphoteric surfactant) using an ultrasonic tip processor. Three concentrations of each surfactant (1mM, 10mM and 100mM) were tested, and all samples were sonicated until an adequate dispersion degree was obtained. Cement pastes with additions of carbon nanotubes of 0.15% by mass of cement were produced in two steps; first the dispersions of MWCNT were combined with the mixing water using an ultrasonic tip processor to guarantee homogeneity, and then cement was added and mixed until a homogeneous paste was obtained. Direct tensile strength, apparent density and open porosity of the pastes were measured after 7 days of curing. It was found that the MWCNT/surfactants dispersions decrease the mechanical properties of the cement based matrix due to an increased porosity caused by the presence of surfactants. © Published under licence by IOP Publishing Ltd.eng
dc.creator.affiliationRodríguez, B., Universidad de Medellín, Medellín, Colombia; Quintero, J.H., Universidad de Medellín, Medellín, Colombia; Arias, Y.P., Universidad Nacional de Colombia, Medellín, Colombia; Mendoza-Reales, O.A., Universidade Federal Do Rio de Janeiro, Rio de Janeiro, Brazil; Ochoa-Botero, J.C., Universidad Nacional de Colombia, Medellín, Colombia; Toledo-Filho, R.D., Universidade Federal Do Rio de Janeiro, Rio de Janeiro, Brazilspa
dc.relation.ispartofesJournal of Physics: Conference Seriesspa
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dc.type.versioninfo:eu-repo/semantics/publishedVersion
dc.type.driverinfo:eu-repo/semantics/conferenceObject


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