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dc.contributor.authorQureshi, Tanvir
dc.contributor.authorKanellopoulos, Antonios
dc.contributor.authorAl-Tabbaa, Abir
dc.date.accessioned2020-07-07T00:06:22Z
dc.date.available2020-07-07T00:06:22Z
dc.date.issued2019-01-10
dc.identifier.citationQureshi , T , Kanellopoulos , A & Al-Tabbaa , A 2019 , ' Autogenous self-healing of cement with expansive minerals-II : Impact of age and the role of optimised expansive minerals in healing performance ' , Construction and Building Materials , vol. 194 , pp. 266-275 . https://doi.org/10.1016/j.conbuildmat.2018.11.027
dc.identifier.issn0950-0618
dc.identifier.otherPURE: 15954585
dc.identifier.otherPURE UUID: 9a4e3982-7893-4e89-bb34-cb7cfe1381f3
dc.identifier.otherScopus: 85056267683
dc.identifier.otherORCID: /0000-0001-9278-2035/work/62751280
dc.identifier.urihttp://hdl.handle.net/2299/22939
dc.description© 2018 Elsevier Ltd. All rights reserved. This manuscript is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International Licence http://creativecommons.org/licenses/by-nc-nd/4.0/.
dc.description.abstractThis part of the study presents the optimisation of expansive minerals mix proportions and establishes a quantitative and qualitative correlation between self-healing and the cracking age of cementitious materials. The hydration degree of cementitious materials is considered as a quantitative measure of age and the corresponding healing performance was analysed to establish an age-healing relation. Healing performances were assessed in terms of load recovery, crack sealing efficiency and gas permeability. The microstructure of materials was investigated using XRD, TGA and SEM-EDX. The self-healing performance of particular cement mixes shows linearly increasing correlation with the reduction of hydration degree. However, cement mixes containing expansive mineral result in higher healing performance than mixes containing only Portland cement (PC). This observation was confirmed for all cracking ages. Blends containing only PC showed healing materials that were mostly calcite and portlandite, while the optimised use of expansive minerals produced denser healing materials with C-S-H, and complex Ca, Mg, Si, Al combined hydrated and carbonated products in addition to calcite and portlandite. The results further suggest that the proportions of calcite, portlandite and ettringite in healing compounds have an increasing trend with the age of hardened cementitious materials.en
dc.format.extent10
dc.language.isoeng
dc.relation.ispartofConstruction and Building Materials
dc.subjectAge-healing relation
dc.subjectExpansive minerals
dc.subjectHydration degree
dc.subjectMicrostructure
dc.subjectSelf-healing
dc.subjectCivil and Structural Engineering
dc.subjectBuilding and Construction
dc.subjectMaterials Science(all)
dc.titleAutogenous self-healing of cement with expansive minerals-II : Impact of age and the role of optimised expansive minerals in healing performanceen
dc.contributor.institutionCentre for Engineering Research
dc.contributor.institutionMaterials and Structures
dc.contributor.institutionSchool of Engineering and Technology
dc.description.statusPeer reviewed
dc.date.embargoedUntil2019-11-10
dc.identifier.urlhttp://www.scopus.com/inward/record.url?scp=85056267683&partnerID=8YFLogxK
rioxxterms.versionAM
rioxxterms.versionofrecordhttps://doi.org/10.1016/j.conbuildmat.2018.11.027
rioxxterms.typeJournal Article/Review
herts.preservation.rarelyaccessedtrue


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