One-part sodium carbonate-activated slag/calcined dolomite mixes: effects of nano-silica on strength development, microstructure and shrinkage

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dc.authorid0000-0003-1484-7758
dc.contributor.authorAkturk, Busra
dc.contributor.authorAkyuncu, Veysel
dc.contributor.authorAkgul, Halil Ibrahim
dc.date.accessioned2026-04-04T18:55:44Z
dc.date.available2026-04-04T18:55:44Z
dc.date.issued2025
dc.departmentİstanbul Bilgi Üniversitesi
dc.description.abstractThis study explores the use of calcined dolomite (CD) as a supplementary precursor and nano-silica (NS) as an additive in one-part sodium carbonate-activated slag-based mixes. Binary mixes incorporated up to 20% CD, while ternary mixes included 3% NS to enhance microstructure, strength, and shrinkage performance. Microstructural analysis was conducted using X-ray diffraction, scanning electron microscopy, and mercury intrusion porosimetry. Results showed that CD increased flowability and reduced setting time, whereas NS slightly decreased flow but significantly accelerated setting. The optimal compressive strength (55 MPa at 28 days) was achieved at 10% CD replacement. While NS improved strength and reduced shrinkage in slag-based mixes, it negatively impacted ternary mixes. Binary mixes exhibited lower shrinkage due to pore structure variations. Environmental assessments indicated that these mixes produce significantly lower CO2 emissions than cement-based alternatives, highlighting their potential as a sustainable construction material.
dc.description.sponsorshipMETU Central Laboratory for the XRD
dc.description.sponsorshipThe authors would like to acknowledge the AKCANSA Cement Company for supplying slag. Moreover, we would like to thank the METU Central Laboratory for the XRD and MIP analyses.
dc.identifier.doi10.1080/21650373.2025.2496700
dc.identifier.doi10.1080/21650373.2025.2496700
dc.identifier.endpage1309
dc.identifier.issn2165-0373
dc.identifier.issn2165-0381
dc.identifier.issue7
dc.identifier.scopus2-s2.0-105003878175
dc.identifier.scopusqualityQ2
dc.identifier.startpage1293
dc.identifier.urihttps://doi.org/10.1080/21650373.2025.2496700
dc.identifier.urihttps://hdl.handle.net/11411/10543
dc.identifier.volume14
dc.identifier.wosWOS:001489844800001
dc.identifier.wosqualityQ1
dc.indekslendigikaynakWeb of Science
dc.indekslendigikaynakScopus
dc.language.isoen
dc.publisherTaylor & Francis Ltd
dc.relation.ispartofJournal of Sustainable Cement-Based Materials
dc.relation.publicationcategoryMakale - Uluslararası Hakemli Dergi - Kurum Öğretim Elemanı
dc.rightsinfo:eu-repo/semantics/closedAccess
dc.snmzKA_WoS_20260402
dc.snmzKA_Scopus_20260402
dc.subjectOne-Part Alkali-Activated Materials
dc.subjectSodium Carbonate
dc.subjectCalcined Dolomite
dc.subjectNano-Silica
dc.subjectMicrostructure
dc.subjectShrinkage
dc.subjectEnvironmental Impact
dc.titleOne-part sodium carbonate-activated slag/calcined dolomite mixes: effects of nano-silica on strength development, microstructure and shrinkage
dc.typeArticle

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