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dc.contributor.authorDanner, Tobias
dc.contributor.authorJakobsen, Ulla Hjorth
dc.contributor.authorGeiker, Mette Rica
dc.date.accessioned2019-05-13T10:30:38Z
dc.date.available2019-05-13T10:30:38Z
dc.date.created2019-05-10T13:16:20Z
dc.date.issued2019
dc.identifier.citationMinerals. 2019, 9 (5), .nb_NO
dc.identifier.issn2075-163X
dc.identifier.urihttp://hdl.handle.net/11250/2597397
dc.description.abstractSelf-healing of cracked concrete beams after 25 years of marine exposure was investigated. The extent of self-healing and the chemical and mineralogical composition of the self-healing products were characterized, and mechanisms proposed. There was no effect of varying silica fume (4%, 12%) and fly ash content (0%, 20%) on the mineralogy and chemistry of the self-healing products and the extent of self-healing. Crack widths smaller than 0.2 mm appeared closed. With increasing crack depth, a sequence of changing mineralogy of self-healing products was found. In the outer part of the crack (0–5 mm depth from the exterior surface) only calcite was precipitated followed by brucite layers from 5–30 mm depth. The brucite was occasionally intermixed with calcite. At crack depths >30 mm only ettringite was observed. It is hypothesized that the mineralogical sequence observed with increasing crack depth occurs due to an increasing pH of the solution inside the crack with increased crack depth. Self-healing of cracks in marine exposed concrete is proposed to happen through precipitation of ions from seawater partly in reaction with ions from the cement paste in the outer part of the crack and through dissolution and reprecipitation of ettringite at larger crack depthsen
dc.language.isoengnb_NO
dc.publisherMDPInb_NO
dc.rightsAttribution-NonCommercial-NoDerivatives 4.0 Internasjonal*
dc.rights.urihttp://creativecommons.org/licenses/by-nc-nd/4.0/deed.no*
dc.subjectConcretenb_NO
dc.subjectCracksnb_NO
dc.subjectSelf-healingnb_NO
dc.subjectSeawaternb_NO
dc.subjectBindernb_NO
dc.subjectMechanismnb_NO
dc.subjectMineralogynb_NO
dc.subjectLong-termnb_NO
dc.titleMineralogical Sequence of Self-Healing Products in Cracked Marine Concretenb_NO
dc.typeJournal articlenb_NO
dc.typePeer reviewednb_NO
dc.description.versionpublishedVersionnb_NO
dc.subject.nsiVDP::Teknologi: 500nb_NO
dc.source.pagenumber20nb_NO
dc.source.volume9nb_NO
dc.source.journalMineralsnb_NO
dc.source.issue5nb_NO
dc.identifier.doi10.3390/min9050284
dc.identifier.cristin1696930
dc.relation.projectNorges forskningsråd: 245645nb_NO
cristin.unitcode7401,30,40,0
cristin.unitnameArkitektur, byggematerialer og konstruksjoner
cristin.ispublishedtrue
cristin.fulltextoriginal
cristin.qualitycode1


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Attribution-NonCommercial-NoDerivatives 4.0 Internasjonal
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