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dc.contributor.authorGeng, Guoqing
dc.contributor.authorTaylor, Rae
dc.contributor.authorBae, Sungchul
dc.contributor.authorHernández-Cruz, Daniel
dc.contributor.authorKilcoyne, David A.
dc.contributor.authorEmwas, Abdul-Hamid M.
dc.contributor.authorMonteiro, Paulo J. M.
dc.date.accessioned2015-08-12T09:27:11Z
dc.date.available2015-08-12T09:27:11Z
dc.date.issued2015-07-16
dc.identifier.citationGeng, G., Taylor, R., Bae, S., Hernández-Cruz, D., Kilcoyne, D. A., Emwas, A.-H., & Monteiro, P. J. M. (2015). Atomic and nano-scale characterization of a 50-year-old hydrated C3S paste. Cement and Concrete Research, 77, 36–46. doi:10.1016/j.cemconres.2015.06.010
dc.identifier.issn0008-8846
dc.identifier.doi10.1016/j.cemconres.2015.06.010
dc.identifier.urihttp://hdl.handle.net/10754/566075
dc.description.abstractThis paper investigates the atomic and nano-scale structures of a 50-year-old hydrated alite paste. Imaged by TEM, the outer product C-S-H fibers are composed of particles that are 1.5-2 nm thick and several tens of nanometers long. 29Si NMR shows 47.9% Q1 and 52.1% Q2, with a mean SiO4 tetrahedron chain length (MCL) of 4.18, indicating a limited degree of polymerization after 50 years' hydration. A Scanning Transmission X-ray Microscopy (STXM) study was conducted on this late-age paste and a 1.5 year old hydrated C3S solution. Near Edge X-ray Absorption Fine Structure (NEXAFS) at Ca L3,2-edge indicates that Ca2 + in C-S-H is in an irregular symmetric coordination, which agrees more with the atomic structure of tobermorite than that of jennite. At Si K-edge, multi-scattering phenomenon is sensitive to the degree of polymerization, which has the potential to unveil the structure of the SiO44 - tetrahedron chain. © 2015 Elsevier Ltd. All rights reserved.
dc.publisherElsevier BV
dc.relation.urlhttps://manuscript.elsevier.com/S0008884615001799/pdf/S0008884615001799.pdf
dc.rightsNOTICE: this is the author’s version of a work that was accepted for publication in [JournalTitle]. Changes resulting from the publishing process, such as peer review, editing, corrections, structural formatting, and other quality control mechanisms may not be reflected in this document. Changes may have been made to this work since it was submitted for publication. A definitive version was subsequently published in [JournalTitle], [[Volume], [Issue], (2015-07-16)] DOI: 10.1016/j.cemconres.2015.06.010 . © 2015. This manuscript version is made available under the CC-BY-NC-ND 4.0 license http://creativecommons.org/licenses/by-nc-nd/4.0/
dc.rightsThis file is an open access version redistributed from: https://manuscript.elsevier.com/S0008884615001799/pdf/S0008884615001799.pdf
dc.subjectCa<inf>3</inf>SiO<inf>5</inf> (D)
dc.subjectMicrostructure
dc.subjectNMR
dc.subjectSTXM
dc.subjectTEM (B)
dc.titleAtomic and nano-scale characterization of a 50-year-old hydrated C3S paste
dc.typeArticle
dc.contributor.departmentAdvanced Nanofabrication, Imaging and Characterization Core Lab
dc.contributor.departmentNMR
dc.identifier.journalCement and Concrete Research
dc.rights.embargodate2016-07-14
dc.eprint.versionPost-print
kaust.personEmwas, Abdul-Hamid M.
refterms.dateFOA2020-04-23T11:45:28Z
dc.date.published-online2015-07-16
dc.date.published-print2015-11


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