Hydration kinetics and performance of sodium carbonate-activated slag-based systems containing reactive MgO and metakaolin under carbonation

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dc.authoridYang, En-Hua/0000-0001-6066-8254|Unluer, Cise/0000-0001-5207-5993|Hooper, Thomas/0000-0002-0555-506X|Akturk, Busra/0000-0003-1484-7758|Akturk, Busra/0000-0003-1484-7758|ABOLFATHI, Mehrnosh/0000-0002-1666-3074|ULUKAYA, SERHAN/0000-0001-6177-1739
dc.authorwosidYang, En-Hua/A-3780-2011
dc.authorwosidAbolfathi, Mehrnosh/GQH-3398-2022
dc.authorwosidUnluer, Cise/V-7508-2019
dc.authorwosidHooper, Thomas/R-5246-2019
dc.authorwosidAkturk, Busra/JCO-1851-2023
dc.authorwosidAkturk, Busra/AEZ-1900-2022
dc.contributor.authorAkturk, Busra
dc.contributor.authorAbolfathi, Mehrnosh
dc.contributor.authorUlukaya, Serhan
dc.contributor.authorKizilkanat, Ahmet B.
dc.contributor.authorHooper, Thomas J. N.
dc.contributor.authorGu, Lei
dc.contributor.authorYang, En-Hua
dc.date.accessioned2024-07-18T20:42:30Z
dc.date.available2024-07-18T20:42:30Z
dc.date.issued2022
dc.departmentİstanbul Bilgi Üniversitesien_US
dc.description.abstractThe hydration mechanism and strength development of sodium carbonate-activated slag-based systems mainly depend on the additives used. Although the effects of mineral additives in such systems have been extensively investigated, the effects of Mg2+, Al3+, and Si4+ ions increasing with the addition of reactive MgO (Mg) and metakaolin (Mk) on the hydration mechanism of such systems have not been established yet. This study investigated the hydration kinetics and performance of sodium carbonate-activated ternary blended slag-based binder systems. The hydration mechanism was revealed by isothermal calorimetry and mechanical performance was evaluated with the measurement of compressive strength at different ages up to 56 days. The reaction mechanisms were investigated through X-ray diffraction, Fourier transform infrared spectroscopy, thermogravimetric analysis and 29Si and 27Al solid-state nuclear magnetic resonance (NMR). C-(A)-S-H, Na and Al-enriched C-(N,A)-S-H and hydrotalcite were the main reaction products responsible for the strength development of the samples, accompanied by the minor contribution of other carbonate-containing phases. Partial replacement of slag with Mg and Mk led to high early-age strengths compared to plain samples when Mk was used at 5%. Samples incorporating Mg and Mk achieved similar or higher strengths than ordinary Portland cement-based samples. However, an increase in replacement ratio of Mk beyond 5% led to a significant decrease in compressive strength. Furthermore, the performance of samples under accelerated carbonation was studied. The use of Mg and Mk enhanced carbonation resistance due to enhanced hydrotalcite and C-(N,A)-S-H gel formation, highlighting the potential of using slag-Mg-Mk blends as an alternative binder system.en_US
dc.description.sponsorshipYildiz Technical University Research Foundation, Turkey [FYL-2021-4129]; Royal Society [ICA\R1\201310]; Ministry of National Development, Singapore [CoT-V1-2020-1]en_US
dc.description.sponsorshipThis study was supported by the research grant of Yildiz Technical University Research Foundation, Turkey (Grant ID: FYL-2021-4129) . The authors would like to acknowledge the KUMAS A.S. and AKCANSA Cement Company for supplying the materials. Cise Unluer was funded by The Royal Society (project ref: ICA\R1\201310) . We would like to acknowledge the Centre of High Field NMR Spectroscopy and Imaging at Nanyang Technological University for the use of their facilities. Funding supports from Ministry of National Development, Singapore (CoT-V1-2020-1) and National Research Foundation Singapore (SinBerBEST) are greatly appreciated.en_US
dc.identifier.doi10.1016/j.cemconcomp.2022.104617
dc.identifier.issn0958-9465
dc.identifier.issn1873-393X
dc.identifier.scopus2-s2.0-85132226890en_US
dc.identifier.scopusqualityQ1en_US
dc.identifier.urihttps://doi.org/10.1016/j.cemconcomp.2022.104617
dc.identifier.urihttps://hdl.handle.net/11411/7301
dc.identifier.volume132en_US
dc.identifier.wosWOS:000817707600002en_US
dc.identifier.wosqualityQ1en_US
dc.indekslendigikaynakWeb of Scienceen_US
dc.indekslendigikaynakScopusen_US
dc.language.isoenen_US
dc.publisherElsevier Sci Ltden_US
dc.relation.ispartofCement & Concrete Compositesen_US
dc.relation.publicationcategoryMakale - Uluslararası Hakemli Dergi - Kurum Öğretim Elemanıen_US
dc.rightsinfo:eu-repo/semantics/openAccessen_US
dc.subjectSodium Carbonate Activationen_US
dc.subjectReactive Mgoen_US
dc.subjectMetakaolinen_US
dc.subjectSlagen_US
dc.subjectMicrostructureen_US
dc.subjectAccelerated Carbonationen_US
dc.subjectCalcium Silicate Hydrateen_US
dc.subjectC-S-Hen_US
dc.subjectFly-Ashen_US
dc.subjectAlkaline Activationen_US
dc.subjectChemical-Shiftsen_US
dc.subjectWaste Glassen_US
dc.subjectPart Ien_US
dc.subjectStrengthen_US
dc.subjectNmren_US
dc.subjectConcreteen_US
dc.titleHydration kinetics and performance of sodium carbonate-activated slag-based systems containing reactive MgO and metakaolin under carbonationen_US
dc.typeArticleen_US

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