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Article: Carbonation-induced volume change in alkali-activated slag

TitleCarbonation-induced volume change in alkali-activated slag
Authors
KeywordsCalcium-alumina-silicate-hydrate
Alkalis
Alkali-activated slag
Crystal growth model
Volume change mechanism
Issue Date2017
Citation
Construction and Building Materials, 2017, v. 144, p. 635-644 How to Cite?
Abstract© 2017 Elsevier Ltd In this work, the volume changes of alkali-activated slag (AAS) paste prepared using various types of activator were characterized at nitrogen and atmospheric conditions. The results show that atmospheric carbonation of AAS results in volumetric expansion and disintegration, which may be attributed to the generation of crystallization stress in restrained pore spaces. This study suggests that the carbonation-induced volume change in cementitious materials is a combined result of chemical reactions and physical characteristics, depending on hydrated phase assemblage, composition, and pore structure of cementitious solids. The potassium ions (K + ), compared to sodium ions (Na + ), can enter the interlayer space of calcium-alumina-silicate-hydrate (C-A-S-H), distort the C-A-S-H layers stacking, coarsen the pore structure, and make AAS more vulnerable to carbonation. It is suggested that the high alkali content in AAS systems contributes considerably to its poor volumetric stability under carbonation.
Persistent Identifierhttp://hdl.handle.net/10722/251648
ISSN
2023 Impact Factor: 7.4
2023 SCImago Journal Rankings: 1.999
ISI Accession Number ID

 

DC FieldValueLanguage
dc.contributor.authorYe, Hailong-
dc.contributor.authorRadlińska, Aleksandra-
dc.date.accessioned2018-03-08T05:00:34Z-
dc.date.available2018-03-08T05:00:34Z-
dc.date.issued2017-
dc.identifier.citationConstruction and Building Materials, 2017, v. 144, p. 635-644-
dc.identifier.issn0950-0618-
dc.identifier.urihttp://hdl.handle.net/10722/251648-
dc.description.abstract© 2017 Elsevier Ltd In this work, the volume changes of alkali-activated slag (AAS) paste prepared using various types of activator were characterized at nitrogen and atmospheric conditions. The results show that atmospheric carbonation of AAS results in volumetric expansion and disintegration, which may be attributed to the generation of crystallization stress in restrained pore spaces. This study suggests that the carbonation-induced volume change in cementitious materials is a combined result of chemical reactions and physical characteristics, depending on hydrated phase assemblage, composition, and pore structure of cementitious solids. The potassium ions (K + ), compared to sodium ions (Na + ), can enter the interlayer space of calcium-alumina-silicate-hydrate (C-A-S-H), distort the C-A-S-H layers stacking, coarsen the pore structure, and make AAS more vulnerable to carbonation. It is suggested that the high alkali content in AAS systems contributes considerably to its poor volumetric stability under carbonation.-
dc.languageeng-
dc.relation.ispartofConstruction and Building Materials-
dc.subjectCalcium-alumina-silicate-hydrate-
dc.subjectAlkalis-
dc.subjectAlkali-activated slag-
dc.subjectCrystal growth model-
dc.subjectVolume change mechanism-
dc.titleCarbonation-induced volume change in alkali-activated slag-
dc.typeArticle-
dc.description.naturelink_to_subscribed_fulltext-
dc.identifier.doi10.1016/j.conbuildmat.2017.03.238-
dc.identifier.scopuseid_2-s2.0-85017123318-
dc.identifier.volume144-
dc.identifier.spage635-
dc.identifier.epage644-
dc.identifier.isiWOS:000401385800063-
dc.identifier.issnl0950-0618-

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