Please use this identifier to cite or link to this item: https://hdl.handle.net/10356/138975
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dc.contributor.authorLi, Yeen_US
dc.contributor.authorZhang, Yaoen_US
dc.contributor.authorYang, En-Huaen_US
dc.contributor.authorTan, Kang Haien_US
dc.date.accessioned2020-05-14T07:50:22Z-
dc.date.available2020-05-14T07:50:22Z-
dc.date.issued2019-
dc.identifier.citationLi, Y., Zhang, Y., Yang, E.-H., & Tan, K. H. (2019). Effects of geometry and fraction of polypropylene fibers on permeability of ultra-high performance concrete after heat exposure. Cement and Concrete Research, 116, 168-178. doi:10.1016/j.cemconres.2018.11.009en_US
dc.identifier.issn0008-8846en_US
dc.identifier.urihttps://hdl.handle.net/10356/138975-
dc.description.abstractThis paper investigated the effect of geometry and fraction of polypropylene (PP) fiber and the induced microcracks on permeability of ultra-high performance concrete (UHPC) subjected to elevated temperature. Residual permeability and microcrack networks of fifteen UHPC mixes were characterized and an analytical model correlating residual permeability of UHPC with fiber fraction and geometry was proposed. Results showed that increasing fiber length and dosage had much stronger effect than increasing fiber diameter on enhancing permeability due to greater enhancement on percolation of fiber tunnels. It was found that permeability of UHPC is positively correlated with both the aspect ratio and dosage of PP fibers. However, at low fiber aspect ratio, increased fiber dosage does not increase the permeability of UHPC. Similarly, at low fiber dosage, solely increasing fiber aspect ratio does not contribute much to increasing permeability of UHPC. The proposed model thus provides insight for PP fiber selection and optimization to prevent explosive spalling of concrete.en_US
dc.description.sponsorshipNRF (Natl Research Foundation, S’pore)en_US
dc.language.isoenen_US
dc.relation.ispartofCement and Concrete Researchen_US
dc.rights© 2018 Elsevier Ltd. All rights reserved.en_US
dc.subjectEngineering::Chemical technologyen_US
dc.titleEffects of geometry and fraction of polypropylene fibers on permeability of ultra-high performance concrete after heat exposureen_US
dc.typeJournal Articleen
dc.contributor.schoolSchool of Civil and Environmental Engineeringen_US
dc.identifier.doi10.1016/j.cemconres.2018.11.009-
dc.identifier.scopus2-s2.0-85057303745-
dc.identifier.volume116en_US
dc.identifier.spage168en_US
dc.identifier.epage178en_US
dc.subject.keywordsPermeabilityen_US
dc.subject.keywordsMicrostructureen_US
item.grantfulltextnone-
item.fulltextNo Fulltext-
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