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dc.contributor.authorXi, Xiang
dc.contributor.authorÖztürk, Murat
dc.contributor.authorChung, Deborah Duen Ling
dc.date.accessioned2021-12-21T12:44:46Z
dc.date.available2021-12-21T12:44:46Z
dc.date.issued2021en_US
dc.identifier.citationXi, X., Ozturk, M., Chung, D.D.L. (2021). DC electric polarization of cured cement paste being unexpectedly hindered by free water Journal of the American Ceramic Society, 105 (2), pp. 1074-1082. https://doi.org/10.1111/jace.18121en_US
dc.identifier.urihttps://doi.org/10.1111/jace.18121
dc.identifier.urihttps://hdl.handle.net/20.500.12508/1930
dc.description.abstractElectric polarization is basic to the dielectric behavior, which is pertinent to the science and applications of cement-based materials. This work reports the dynamics of the DC-current-induced electric polarization/depolarization of cured cement paste and their dependence on the water/cement ratio. This dependence has not been previously reported for any cement-based material. The extent of the polarization is unexpectedly found in this work to decrease as the water/cement ratio increases, indicating that the free water hinders the polarization. This hindrance is due to (i) the dominance of ions behind the polarization (as supported by the previously reported increase in permittivity with increasing temperature), and (ii) the polar water molecules partly shielding the ions from the applied electric field. The fraction of ions in the pore solution that participates in the polarization increases with the polarization time and is 4.5 x 10(-14) for 570 s of polarization at a current of 1 mu A for water/cement ratio 0.35. Upon increasing the water/cement ratio (0.3-0.4), the polarization rate decreases, the polarization extent at a given polarization time decreases, and the time to reach polarization saturation decreases. The polarization/depolarization rate decreases as the current application progresses because the polarization/depolarization hinders further polarization/depolarization. The degree of this hindrance increases with increasing water/cement ratio. Thus, a higher water/cement ratio is preferred if less polarization is desired as in resistance-based self-sensing, whereas a lower water/cement ratio is preferred if more polarization is desired as in capacitance-based self-sensing.en_US
dc.language.isoengen_US
dc.publisherWileyen_US
dc.relation.isversionof10.1111/jace.18121en_US
dc.rightsinfo:eu-repo/semantics/closedAccessen_US
dc.subjectCementen_US
dc.subjectDepolarizationen_US
dc.subjectDielectricen_US
dc.subjectPolarizationen_US
dc.subjectSelf-sensingen_US
dc.subjectWateren_US
dc.subject.classificationMaterials Science
dc.subject.classificationCements
dc.subject.classificationMortar
dc.subject.classificationCarbon Nanofibers
dc.subject.otherCements
dc.subject.otherCuring
dc.subject.otherDepolarization
dc.subject.otherElectric fields
dc.subject.otherIons
dc.subject.otherMolecules
dc.subject.otherCurrent
dc.subject.otherCement based material
dc.subject.otherCement paste
dc.subject.otherDielectric behavior
dc.subject.otherElectric polarization
dc.subject.otherFree water
dc.subject.otherIncreasing temperatures
dc.subject.otherPolar waters
dc.subject.otherPolarization time
dc.subject.otherSelf-sensing
dc.subject.otherDielectric materials
dc.subject.otherCarbon-Fiber
dc.subject.otherPore solution
dc.subject.otherDielectric-Constant
dc.subject.otherPermittivity
dc.subject.otherConcrete
dc.subject.otherDiffusion
dc.titleDC electric polarization of cured cement paste being unexpectedly hindered by free wateren_US
dc.typearticleen_US
dc.relation.journalJournal of the American Ceramic Societyen_US
dc.contributor.departmentMühendislik ve Doğa Bilimleri Fakültesi -- İnşaat Mühendisliği Bölümüen_US
dc.identifier.volume105en_US
dc.identifier.issue2en_US
dc.identifier.startpage1074en_US
dc.identifier.endpage1082en_US
dc.relation.publicationcategoryMakale - Uluslararası Hakemli Dergi - Kurum Öğretim Elemanıen_US
dc.contributor.isteauthorÖztürk, Murat
dc.relation.indexWeb of Science - Scopusen_US
dc.relation.indexWeb of Science Core Collection - Science Citation Index Expanded


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