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dc.contributor.authorAbdalqader, AF
dc.contributor.authorJin, F
dc.contributor.authorAl-Tabbaa, A
dc.date.accessioned2015-06-24T16:04:54Z
dc.date.available2015-06-24T16:04:54Z
dc.date.issued2015
dc.identifier.citationAbdalqader et al. Construction and Building Materials Volume 93 (2015), Pages 506–513. DOI: 10.1016/j.conbuildmat.2015.06.015
dc.identifier.issn0950-0618
dc.identifier.urihttps://www.repository.cam.ac.uk/handle/1810/248688
dc.description.abstractA system of alkali-activated fly ash (FA)/slag (AAFS) mixtures as a clinkerless cement was investigated with different dosages of Na2CO3, as a sustainable activator. The effect of incorporating various proportions of reactive magnesia (MgO) was also examined. Mechanical, mineralogical, and microstructural characterisation of the cement pastes was carried out using the unconfined compressive strength, X-ray diffraction, thermogravimetric analysis, infrared spectroscopy and scanning electron microscopy. It was found that the strength of Na2CO3 activated FA/slag mixtures generally increased with time and the Na2CO3 dosage. The hydration products were mainly C–(N)–A–S–H gel of low-crystallinity, which is rich in Al and may have included Na in its structure, and hydrotalcite-like phases. Adding reactive MgO in the mixes showed an accelerating effect on the hydration rate as suggested by the isothermal calorimetry data. Additionally, findings revealed variations on the strength of the pastes and the chemical compositions of the hydration products by introducing reactive MgO into the mixtures.
dc.description.sponsorshipThe financial support of the PhD scholarship for the first author from the Yousef Jameel Foundation and Cambridge Overseas Trust are gratefully acknowledged.
dc.languageEnglish
dc.language.isoen
dc.publisherElsevier BV
dc.rightsAttribution-NonCommercial-NoDerivs 2.0 UK: England & Wales
dc.rights.urihttp://creativecommons.org/licenses/by-nc-nd/2.0/uk/
dc.subjectFly ash
dc.subjectSlag
dc.subjectReactive magnesia
dc.subjectSodium carbonate
dc.subjectHydration
dc.subjectMicrostructure
dc.titleCharacterisation of reactive magnesia and sodium carbonate-activated fly ash/slag paste blends
dc.typeArticle
dc.description.versionThis is the author accepted manuscript. The final version is available from Elsevier via http://dx.doi.org/10.1016/j.conbuildmat.2015.06.015
prism.endingPage513
prism.publicationDate2015
prism.publicationNameConstruction and Building Materials
prism.startingPage506
prism.volume93
rioxxterms.versionofrecord10.1016/j.conbuildmat.2015.06.015
rioxxterms.licenseref.urihttp://www.rioxx.net/licenses/all-rights-reserved
rioxxterms.licenseref.startdate2015-06-20
dc.contributor.orcidAbdalqader, Ahmed [0000-0001-6097-6150]
dc.contributor.orcidJin, Fei [0000-0003-0899-7063]
dc.identifier.eissn1879-0526
rioxxterms.typeJournal Article/Review
pubs.funder-project-idEngineering and Physical Sciences Research Council (EP/M003159/1)
rioxxterms.freetoread.startdate2016-06-20


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