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Article: Chemical and physical effects of high-volume limestone powder on sodium silicate-activated slag cement (AASC)

TitleChemical and physical effects of high-volume limestone powder on sodium silicate-activated slag cement (AASC)
Authors
KeywordsAlkali-activated slag cement
Limestone powder
Microstructure
Shrinkage
Issue Date2021
Citation
Construction and Building Materials, 2021, v. 292, article no. 123257 How to Cite?
AbstractThis study aims at discussing physical and chemical influence of limestone powder (LS) on the AAS system. General properties, including fluidity, setting time, drying shrinkage, and mechanical strength of AAS pastes/mortars, were examined. Pore structure change and phase assemblages of LS-AAS composites were studied. The results showed that the addition of 50 wt% LS increased the fluidity and setting time of AAS pastes, but reduced the total drying shrinkage of AAS mortars. Meanwhile, around 30% reduction in mechanical properties were found at the same replacement ratio. The pore structure was refined in the pastes with LS replacement<25 wt%, but was coarsened in the sample with 40 wt% LS. Limited new phase was formed in the sodium silicate activated slag samples, which was believed to depend on the modulus of the activator. Around 30% hydration degree of LS was achieved in 40 wt% LS-replaced AAS pastes hydrated for 7 ~ 28 d as determined by TG-DSC analysis. The main drawbacks of AAS, fluidity, setting time, and drying shrinkage, are improved by using high-volume LS, so use of high-volume LS in AAS system can be an option for the purpose of environmental protection.
Persistent Identifierhttp://hdl.handle.net/10722/341306
ISSN
2023 Impact Factor: 7.4
2023 SCImago Journal Rankings: 1.999
ISI Accession Number ID

 

DC FieldValueLanguage
dc.contributor.authorZhu, Xiaohong-
dc.contributor.authorKang, Xiaojuan-
dc.contributor.authorDeng, Jiaxin-
dc.contributor.authorYang, Kai-
dc.contributor.authorJiang, Shouheng-
dc.contributor.authorYang, Changhui-
dc.date.accessioned2024-03-13T08:41:47Z-
dc.date.available2024-03-13T08:41:47Z-
dc.date.issued2021-
dc.identifier.citationConstruction and Building Materials, 2021, v. 292, article no. 123257-
dc.identifier.issn0950-0618-
dc.identifier.urihttp://hdl.handle.net/10722/341306-
dc.description.abstractThis study aims at discussing physical and chemical influence of limestone powder (LS) on the AAS system. General properties, including fluidity, setting time, drying shrinkage, and mechanical strength of AAS pastes/mortars, were examined. Pore structure change and phase assemblages of LS-AAS composites were studied. The results showed that the addition of 50 wt% LS increased the fluidity and setting time of AAS pastes, but reduced the total drying shrinkage of AAS mortars. Meanwhile, around 30% reduction in mechanical properties were found at the same replacement ratio. The pore structure was refined in the pastes with LS replacement<25 wt%, but was coarsened in the sample with 40 wt% LS. Limited new phase was formed in the sodium silicate activated slag samples, which was believed to depend on the modulus of the activator. Around 30% hydration degree of LS was achieved in 40 wt% LS-replaced AAS pastes hydrated for 7 ~ 28 d as determined by TG-DSC analysis. The main drawbacks of AAS, fluidity, setting time, and drying shrinkage, are improved by using high-volume LS, so use of high-volume LS in AAS system can be an option for the purpose of environmental protection.-
dc.languageeng-
dc.relation.ispartofConstruction and Building Materials-
dc.subjectAlkali-activated slag cement-
dc.subjectLimestone powder-
dc.subjectMicrostructure-
dc.subjectShrinkage-
dc.titleChemical and physical effects of high-volume limestone powder on sodium silicate-activated slag cement (AASC)-
dc.typeArticle-
dc.description.naturelink_to_subscribed_fulltext-
dc.identifier.doi10.1016/j.conbuildmat.2021.123257-
dc.identifier.scopuseid_2-s2.0-85104913873-
dc.identifier.volume292-
dc.identifier.spagearticle no. 123257-
dc.identifier.epagearticle no. 123257-
dc.identifier.isiWOS:000660296800005-

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