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Article: Roles of packing density and slurry film thickness in synergistic effects of metakaolin and silica fume

TitleRoles of packing density and slurry film thickness in synergistic effects of metakaolin and silica fume
Authors
KeywordsSlurry film thickness
Particle packing
Wet packing density
Metakaolin
Silica fume
Issue Date2021
PublisherElsevier BV. The Journal's web site is located at http://www.elsevier.com/locate/powtec
Citation
Powder Technology, 2021, v. 387, p. 575-583 How to Cite?
AbstractMetakaolin (MK) and silica fume (SF) have been added either individually or in combination to improve concrete performance. Recent studies proved that the combined addition of MK and SF offers synergistic effects, but the mechanism behind is still not unclear. Herein, it is postulated that the synergistic effects arise mainly from the successive filling effects of the MK and SF into voids between larger size particles, which increase the wet packing density (WPD). The present work indicated that the slurry formed of the water and ultrafine particles plays an important role. Good correlation of the workability measures to the slurry film thickness (SFT) revealed the governing factor of SFT for the first time. Moreover, the synergistic effects of MK and SF on the compressive and flexural strengths have been studied based on cementing efficiency and synergistic factors. Correlation of the synergistic factor to the WPD revealed that the WPD plays an important role.
Persistent Identifierhttp://hdl.handle.net/10722/308073
ISSN
2020 Impact Factor: 5.134
2020 SCImago Journal Rankings: 1.079
ISI Accession Number ID

 

DC FieldValueLanguage
dc.contributor.authorChu, SH-
dc.contributor.authorChen, JJ-
dc.contributor.authorLi, LG-
dc.contributor.authorNg, PL-
dc.contributor.authorKwan, AKH-
dc.date.accessioned2021-11-12T13:42:07Z-
dc.date.available2021-11-12T13:42:07Z-
dc.date.issued2021-
dc.identifier.citationPowder Technology, 2021, v. 387, p. 575-583-
dc.identifier.issn0032-5910-
dc.identifier.urihttp://hdl.handle.net/10722/308073-
dc.description.abstractMetakaolin (MK) and silica fume (SF) have been added either individually or in combination to improve concrete performance. Recent studies proved that the combined addition of MK and SF offers synergistic effects, but the mechanism behind is still not unclear. Herein, it is postulated that the synergistic effects arise mainly from the successive filling effects of the MK and SF into voids between larger size particles, which increase the wet packing density (WPD). The present work indicated that the slurry formed of the water and ultrafine particles plays an important role. Good correlation of the workability measures to the slurry film thickness (SFT) revealed the governing factor of SFT for the first time. Moreover, the synergistic effects of MK and SF on the compressive and flexural strengths have been studied based on cementing efficiency and synergistic factors. Correlation of the synergistic factor to the WPD revealed that the WPD plays an important role.-
dc.languageeng-
dc.publisherElsevier BV. The Journal's web site is located at http://www.elsevier.com/locate/powtec-
dc.relation.ispartofPowder Technology-
dc.subjectSlurry film thickness-
dc.subjectParticle packing-
dc.subjectWet packing density-
dc.subjectMetakaolin-
dc.subjectSilica fume-
dc.titleRoles of packing density and slurry film thickness in synergistic effects of metakaolin and silica fume-
dc.typeArticle-
dc.identifier.emailKwan, AKH: khkwan@hkucc.hku.hk-
dc.identifier.authorityKwan, AKH=rp00127-
dc.description.naturelink_to_subscribed_fulltext-
dc.identifier.doi10.1016/j.powtec.2021.04.029-
dc.identifier.hkuros329691-
dc.identifier.volume387-
dc.identifier.spage575-
dc.identifier.epage583-
dc.identifier.isiWOS:000652555300001-
dc.publisher.placeNetherlands-

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