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Article: Effect of novel superabsorbent polymer composites on the fresh and hardened properties of alkali-activated slag

TitleEffect of novel superabsorbent polymer composites on the fresh and hardened properties of alkali-activated slag
Authors
KeywordsLow-carbon cement
Alkali-activated slag
Superabsorbent polymer
Fresh properties
Drying shrinkage
Issue Date2020
PublisherElsevier BV. The Journal's web site is located at http://www.elsevier.com/locate/conbuildmat
Citation
Construction and Building Materials, 2020, v. 232, p. article no. 117225 How to Cite?
AbstractIn this work, the poly(sodium-acrylate acrylamide) superabsorbent polymer (SAP) composites reinforced with micro silica and kaolin clay particles are evaluated as novel additives to control and improve the fresh and hardened properties of alkali-activated slag (AAS). The water swelling and retention capacity of plain and modified SAPs in various solutions pertinent to AAS binder systems (including deionized water, saturated Ca(OH)2, 1.0 M NaOH, 0.5 M Na2CO3, and 0.5 M Na2SO4) are studied using the gravimetric ‘tea bag’ and thermogravimetric methods, together with molecular analysis. The results show that the use of micro silica and kaolin clay-reinforced SAP composites slightly alleviates the negative influence of conventional SAP counterparts on the flowability, setting, and early-age compressive strength of AAS pastes. Nevertheless, the addition of SAP composites merely postpones the early-stage drying shrinkage development but tends to increase the long-term deformation of hardened AAS in unsealed conditions, likely due to the reduced bulk stiffness with enlarged porosity.
Persistent Identifierhttp://hdl.handle.net/10722/293282
ISSN
2020 Impact Factor: 6.141
2015 SCImago Journal Rankings: 1.606
ISI Accession Number ID

 

DC FieldValueLanguage
dc.contributor.authorFu, C-
dc.contributor.authorYe, H-
dc.contributor.authorLei, A-
dc.contributor.authorYang, G-
dc.contributor.authorWan, P-
dc.date.accessioned2020-11-23T08:14:28Z-
dc.date.available2020-11-23T08:14:28Z-
dc.date.issued2020-
dc.identifier.citationConstruction and Building Materials, 2020, v. 232, p. article no. 117225-
dc.identifier.issn0950-0618-
dc.identifier.urihttp://hdl.handle.net/10722/293282-
dc.description.abstractIn this work, the poly(sodium-acrylate acrylamide) superabsorbent polymer (SAP) composites reinforced with micro silica and kaolin clay particles are evaluated as novel additives to control and improve the fresh and hardened properties of alkali-activated slag (AAS). The water swelling and retention capacity of plain and modified SAPs in various solutions pertinent to AAS binder systems (including deionized water, saturated Ca(OH)2, 1.0 M NaOH, 0.5 M Na2CO3, and 0.5 M Na2SO4) are studied using the gravimetric ‘tea bag’ and thermogravimetric methods, together with molecular analysis. The results show that the use of micro silica and kaolin clay-reinforced SAP composites slightly alleviates the negative influence of conventional SAP counterparts on the flowability, setting, and early-age compressive strength of AAS pastes. Nevertheless, the addition of SAP composites merely postpones the early-stage drying shrinkage development but tends to increase the long-term deformation of hardened AAS in unsealed conditions, likely due to the reduced bulk stiffness with enlarged porosity.-
dc.languageeng-
dc.publisherElsevier BV. The Journal's web site is located at http://www.elsevier.com/locate/conbuildmat-
dc.relation.ispartofConstruction and Building Materials-
dc.subjectLow-carbon cement-
dc.subjectAlkali-activated slag-
dc.subjectSuperabsorbent polymer-
dc.subjectFresh properties-
dc.subjectDrying shrinkage-
dc.titleEffect of novel superabsorbent polymer composites on the fresh and hardened properties of alkali-activated slag-
dc.typeArticle-
dc.identifier.emailYe, H: hlye@hku.hk-
dc.identifier.authorityYe, H=rp02379-
dc.description.naturelink_to_subscribed_fulltext-
dc.identifier.doi10.1016/j.conbuildmat.2019.117225-
dc.identifier.scopuseid_2-s2.0-85073504756-
dc.identifier.hkuros319214-
dc.identifier.volume232-
dc.identifier.spagearticle no. 117225-
dc.identifier.epagearticle no. 117225-
dc.identifier.isiWOS:000513297300021-
dc.publisher.placeNetherlands-
dc.identifier.issnl0950-0618-

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