Self-healing of microcracks in high-volume fly-ash-incorporated engineered cementitious composites

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dc.authorscopusid7005956634
dc.authorscopusid21733527000
dc.authorscopusid6701834952
dc.authorscopusid53065093400
dc.contributor.authorÖzbay, Erdogan
dc.contributor.authorŞahmaran, Mustafa
dc.contributor.authorLachemi, Mohamed
dc.contributor.authorYücel, Hasan Erhan
dc.date.accessioned2024-09-19T15:47:09Z
dc.date.available2024-09-19T15:47:09Z
dc.date.issued2013
dc.departmentHatay Mustafa Kemal Üniversitesien_US
dc.description.abstractThis paper presents the self-healing ability of engineered cementitious composites (ECCs) containing high-volume fy ash (HVFA). Composites containing two different contents of FA (55 and 70% by weight of total cementitious material) are examined. A splitting tensile strength test was applied to generate microcracks in ECC mixtures, where cylindrical specimens were preloaded up to their 85% maximum deformation capacity at 28 days. These specimens were then exposed to further continuous wet (CW), continuous air (CA), and wet/dry (W/D) cycle curing regimes up to 60 days. The extent of damage was determined by using the rapid chloride permeability test (RCPT), splitting tensile tests, and microscopic observation. In terms of permeation properties, microcracks induced by mechanical preloading signifcantly increase the RCPT values of ECC mixtures. Moreover, increasing FA content is shown to have a negative effect, especially on the permeation properties of virgin ECC specimens at an early age. Without self-healing, however, the effect of mechanical preloading on the chloride-ion penetration resistance of ECC with 70% FA is lower compared to ECC with 55% FA. The test results also indicate that CW and W/D cycle curing contribute and speed up the healing process of the cracks, signifcantly improve mechanical properties, and drastically decrease the RCPT of ECC. The use of HVFA in ECC production is likely to promote self-healing behavior due to tighter crack width and a higher amount of unhydrated cementitious material available for further hydration. Therefore, it appears that the curing conditions and ECC composition signifcantly infuence self-healing ability. Copyright © 2013, American Concrete Institute. All rights reserved.en_US
dc.identifier.endpage43en_US
dc.identifier.issn0889-325X
dc.identifier.issue1en_US
dc.identifier.scopus2-s2.0-84878414894en_US
dc.identifier.scopusqualityQ2en_US
dc.identifier.startpage33en_US
dc.identifier.urihttps://hdl.handle.net/20.500.12483/15015
dc.identifier.volume110en_US
dc.indekslendigikaynakScopusen_US
dc.language.isoenen_US
dc.relation.ispartofACI Materials Journalen_US
dc.relation.publicationcategoryMakale - Uluslararası Hakemli Dergi - Kurum Öğretim Elemanıen_US
dc.rightsinfo:eu-repo/semantics/closedAccessen_US
dc.subjectEngineered cementitious composites (ECCs)en_US
dc.subjectExposure conditionsen_US
dc.subjectFy ashen_US
dc.subjectSelf-healingen_US
dc.titleSelf-healing of microcracks in high-volume fly-ash-incorporated engineered cementitious compositesen_US
dc.typeArticleen_US

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