Improving the durability of pumice-fly ash based geopolymer concrete with calcium aluminate cement

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dc.contributor.authorKaraaslan, Cemal
dc.contributor.authorYener, Engin
dc.contributor.authorBagatur, Tamer
dc.contributor.authorPolat, Riza
dc.date.accessioned2024-04-24T16:15:11Z
dc.date.available2024-04-24T16:15:11Z
dc.date.issued2022
dc.departmentDicle Üniversitesien_US
dc.description.abstractThis study aims to improve the durability of pumice (70 wt%) and fly ash (30 wt%) based geo-polymer concretes (PGCs) by replacing pumice with calcium aluminate cement (CAC) up to 20 wt % of the total powder binder. In this context, durability characteristics (wetting-drying, freeze-thaw, sulfuric acid, resistance to water-penetration, and abrasion) and microstructure (by performing XRD, FTIR, and SEM-EDS analyses) of PGCs were examined and compared with Portland cement-based concrete (PCC) to control. As a result, CAC substitution of 20% increased the 28-day compressive strength of PGC from 20.0 MPa to 70.0 MPa. The abrasion resistance of PGCs was better than that of PCC, regardless of CAC replacement levels. Since PGC without CAC is highly permeable, wetting-drying cycles, freeze-thaw action, and sulfuric acid attack reduced the strength of this concrete by easily leaching the weakly bound Na cations in the geopolymer matrix and forming -OH and H-O-H type bonds. On the other hand, C-A-S-H type gels formed in PGC with 20% CAC reduced the water penetration depth up to 33 mm by reducing the permeability. In addition, upon 20 wetting-drying and 100 freeze-thaw cycles, compressive strength losses with the CAC replacement level increasing from 0% to 20% decreased from 36.7% to 1.4% and from 43.4% to 4.6%, respectively. Exposure to 5% sulfuric acid solution for 120 days resulted in 0.5% and 16.6% weight loss and 47.4% and 72.6% compressive strength loss in PGCs and PCC, respectively.en_US
dc.identifier.doi10.1016/j.jobe.2022.105110
dc.identifier.issn2352-7102
dc.identifier.scopus2-s2.0-85136063946
dc.identifier.scopusqualityQ1
dc.identifier.urihttps://doi.org/10.1016/j.jobe.2022.105110
dc.identifier.urihttps://hdl.handle.net/11468/15695
dc.identifier.volume59en_US
dc.identifier.wosWOS:000874774400002
dc.identifier.wosqualityQ1
dc.indekslendigikaynakWeb of Science
dc.indekslendigikaynakScopus
dc.language.isoenen_US
dc.publisherElsevieren_US
dc.relation.ispartofJournal of Building Engineering
dc.relation.publicationcategoryMakale - Uluslararası Hakemli Dergi - Kurum Öğretim Elemanıen_US
dc.rightsinfo:eu-repo/semantics/closedAccessen_US
dc.subjectDurabilityen_US
dc.subjectGeopolymer Concreteen_US
dc.subjectPumiceen_US
dc.subjectCalcium Aluminate Cementen_US
dc.subjectSulfuric Acid Attacken_US
dc.subjectFreeze-Thawen_US
dc.subjectMicrostructureen_US
dc.titleImproving the durability of pumice-fly ash based geopolymer concrete with calcium aluminate cementen_US
dc.titleImproving the durability of pumice-fly ash based geopolymer concrete with calcium aluminate cement
dc.typeArticleen_US

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