File Download

There are no files associated with this item.

  Links for fulltext
     (May Require Subscription)
Supplementary

Article: The role of metakaolin in pore structure evolution of Portland cement pastes revealed by an impedance approach

TitleThe role of metakaolin in pore structure evolution of Portland cement pastes revealed by an impedance approach
Authors
KeywordsPore structure
Metakaolin
Cement pastes
Fractal analysis
Impedance approach
Issue Date2021
PublisherPergamon. The Journal's web site is located at http://www.elsevier.com/locate/cemconcomp
Citation
Cement and Concrete Composites, 2021, v. 119, p. article no. 103999 How to Cite?
AbstractMetakaolin has been shown to play a significant role in the pore structure evolution of cementitious materials due to its high pozzolanic reactivity and small fineness. In this work, the early-age evolution of pore structure of moderate heat Portland cement (MHPC) pastes incorporating metakaolin is studied using an innovative impedance approach. Based on the fractal modeling, the pore structure parameters of MHPC blended with metakaolin of various mass percentages up to 20%, including porosity, pore size distribution, pore tortuosity and its fractal dimension, and mean and maximal pore diameters, are determined. The results from the impedance measurements show that the porosity of metakaolin-blended MHPC at both initial hydration and pozzolanic reaction stages increases with the hydration time, which is, respectively, attributed to the dissolution of cement and metakaolin grains. The maximal porosities and the saturation states of MHPC-metakaolin blended pastes occur concurrently due to the dissolution behavior of cement grains. It is concluded that metakaolin incorporation at the 10% replacement ratio is optimal in terms of pore structure refinement of blended cement pastes.
Persistent Identifierhttp://hdl.handle.net/10722/298700
ISSN
2023 Impact Factor: 10.8
2023 SCImago Journal Rankings: 3.650
ISI Accession Number ID

 

DC FieldValueLanguage
dc.contributor.authorCai, R-
dc.contributor.authorTIAN, Z-
dc.contributor.authorYe, H-
dc.contributor.authorHe, Z-
dc.contributor.authorTang, S-
dc.date.accessioned2021-04-12T03:02:11Z-
dc.date.available2021-04-12T03:02:11Z-
dc.date.issued2021-
dc.identifier.citationCement and Concrete Composites, 2021, v. 119, p. article no. 103999-
dc.identifier.issn0958-9465-
dc.identifier.urihttp://hdl.handle.net/10722/298700-
dc.description.abstractMetakaolin has been shown to play a significant role in the pore structure evolution of cementitious materials due to its high pozzolanic reactivity and small fineness. In this work, the early-age evolution of pore structure of moderate heat Portland cement (MHPC) pastes incorporating metakaolin is studied using an innovative impedance approach. Based on the fractal modeling, the pore structure parameters of MHPC blended with metakaolin of various mass percentages up to 20%, including porosity, pore size distribution, pore tortuosity and its fractal dimension, and mean and maximal pore diameters, are determined. The results from the impedance measurements show that the porosity of metakaolin-blended MHPC at both initial hydration and pozzolanic reaction stages increases with the hydration time, which is, respectively, attributed to the dissolution of cement and metakaolin grains. The maximal porosities and the saturation states of MHPC-metakaolin blended pastes occur concurrently due to the dissolution behavior of cement grains. It is concluded that metakaolin incorporation at the 10% replacement ratio is optimal in terms of pore structure refinement of blended cement pastes.-
dc.languageeng-
dc.publisherPergamon. The Journal's web site is located at http://www.elsevier.com/locate/cemconcomp-
dc.relation.ispartofCement and Concrete Composites-
dc.subjectPore structure-
dc.subjectMetakaolin-
dc.subjectCement pastes-
dc.subjectFractal analysis-
dc.subjectImpedance approach-
dc.titleThe role of metakaolin in pore structure evolution of Portland cement pastes revealed by an impedance approach-
dc.typeArticle-
dc.identifier.emailCai, R: rjcai@hku.hk-
dc.identifier.emailYe, H: hlye@hku.hk-
dc.identifier.authorityYe, H=rp02379-
dc.description.naturelink_to_subscribed_fulltext-
dc.identifier.doi10.1016/j.cemconcomp.2021.103999-
dc.identifier.scopuseid_2-s2.0-85102107087-
dc.identifier.hkuros322072-
dc.identifier.hkuros325007-
dc.identifier.volume119-
dc.identifier.spagearticle no. 103999-
dc.identifier.epagearticle no. 103999-
dc.identifier.isiWOS:000636790500004-
dc.publisher.placeUnited Kingdom-

Export via OAI-PMH Interface in XML Formats


OR


Export to Other Non-XML Formats