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dc.contributor.authorAlghamri, R.
dc.contributor.authorKanellopoulos, A.
dc.contributor.authorAl-Tabbaa, A.
dc.date.accessioned2018-03-02T12:28:52Z
dc.date.available2018-03-02T12:28:52Z
dc.date.issued2016-10-15
dc.identifier.citationAlghamri , R , Kanellopoulos , A & Al-Tabbaa , A 2016 , ' Impregnation and encapsulation of lightweight aggregates for self-healing concrete ' , Construction and Building Materials , vol. 124 , pp. 910-921 . https://doi.org/10.1016/j.conbuildmat.2016.07.143
dc.identifier.issn0950-0618
dc.identifier.otherPURE: 12864789
dc.identifier.otherPURE UUID: b093a81c-8083-4dc0-a3ca-7e92a2eccbea
dc.identifier.otherScopus: 84981180068
dc.identifier.otherORCID: /0000-0001-9278-2035/work/62751281
dc.identifier.urihttp://hdl.handle.net/2299/19852
dc.description© 2016 The Author(s). This is an Open Access article, distributed under the terms of the Creative Commons Attribution licence CC BY 4.0 (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted re-use, distribution, and reproduction in any medium, provided the original work is properly cited.
dc.description.abstractThis study investigated a technique of impregnating potential self-healing agents into lightweight aggregates (LWA) and the self-healing performance of concrete mixed with the impregnated LWA. Lightweight aggregates with a diameter range of 4–8 mm were impregnated with a sodium silicate solution as a potential self-healing agent. Concrete specimens containing the impregnated LWA and control specimens were pre-cracked up to 300 μm crack width at 7 days. Flexural strength recovery and reduction in water sorptivity were examined. After 28 days healing in water, the specimens containing the impregnated LWA showed ∼80% recovery of the pre-cracking strength, which accounts more than five times of the control specimens’ recovery. The capillary water absorption was also significantly improved; the specimens healed with the impregnated LWA showed a 50% reduction in the sorptivity index compared with the control cracked specimens and a very similar response to the control uncracked specimens. The contribution of sodium silicate in producing more calcium silicate hydrate gel was confirmed by characterisation the healing products using X-ray diffraction, Fourier transform spectroscopy, and scanning electron microscopy.en
dc.format.extent12
dc.language.isoeng
dc.relation.ispartofConstruction and Building Materials
dc.rightsOpen
dc.subjectImpregnation
dc.subjectLightweight aggregate
dc.subjectSelf-healing concrete
dc.subjectSodium silicate
dc.subjectCivil and Structural Engineering
dc.subjectBuilding and Construction
dc.subjectMaterials Science(all)
dc.titleImpregnation and encapsulation of lightweight aggregates for self-healing concreteen
dc.contributor.institutionSchool of Engineering and Technology
dc.contributor.institutionMaterials and Structures
dc.description.statusPeer reviewed
dc.identifier.urlhttp://www.scopus.com/inward/record.url?scp=84981180068&partnerID=8YFLogxK
dc.relation.schoolSchool of Engineering and Technology
dc.description.versiontypeFinal Published version
dcterms.dateAccepted2016-10-15
rioxxterms.versionVoR
rioxxterms.versionofrecordhttps://doi.org/10.1016/j.conbuildmat.2016.07.143
rioxxterms.licenseref.urihttp://creativecommons.org/licenses/by/4.0/
rioxxterms.typeJournal Article/Review
herts.preservation.rarelyaccessedtrue
herts.rights.accesstypeOpen


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