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Article: Effect of rigid fibres on aggregate packing

TitleEffect of rigid fibres on aggregate packing
Authors
KeywordsAggregate
Fibre reinforced concrete (FRC)
Packing density
Rigid fibres
Issue Date2019
PublisherElsevier BV. The Journal's web site is located at http://www.elsevier.com/locate/conbuildmat
Citation
Construction and Building Materials, 2019, v. 224, p. 326-335 How to Cite?
AbstractThe addition of rigid fibres, such as steel fibres, to concrete would cause significant decrease in workability, thus rendering the fibre reinforced concrete (FRC) so produced more difficult to compact. Whilst the entanglement of the rigid fibres is definitely one contributing factor, the authors are of the view that another contributing factor is the loosening of aggregate packing, which increases the volume of voids between aggregate particles to be filled with paste. In this research, the effect of rigid fibres on aggregate packing was studied by adding different types of steel fibres at different volumes to aggregates of different sizes and measuring the packing density of the aggregate-fibre mixture. It was found that the proportional decrease in packing density due to the addition of steel fibres increases linearly with the fibre volume but at different rates for different fibre types and different aggregate sizes. Generally, fibres with larger aspect ratios have larger effect and smaller size aggregates are less affected. Lastly, based on the test results, some useful guidelines and a packing model for the mix design of steel FRC were developed.
Persistent Identifierhttp://hdl.handle.net/10722/272877
ISSN
2017 Impact Factor: 3.485
2015 SCImago Journal Rankings: 1.606

 

DC FieldValueLanguage
dc.contributor.authorChu, SH-
dc.contributor.authorJiang, Y-
dc.contributor.authorKwan, AKH-
dc.date.accessioned2019-08-06T09:18:15Z-
dc.date.available2019-08-06T09:18:15Z-
dc.date.issued2019-
dc.identifier.citationConstruction and Building Materials, 2019, v. 224, p. 326-335-
dc.identifier.issn0950-0618-
dc.identifier.urihttp://hdl.handle.net/10722/272877-
dc.description.abstractThe addition of rigid fibres, such as steel fibres, to concrete would cause significant decrease in workability, thus rendering the fibre reinforced concrete (FRC) so produced more difficult to compact. Whilst the entanglement of the rigid fibres is definitely one contributing factor, the authors are of the view that another contributing factor is the loosening of aggregate packing, which increases the volume of voids between aggregate particles to be filled with paste. In this research, the effect of rigid fibres on aggregate packing was studied by adding different types of steel fibres at different volumes to aggregates of different sizes and measuring the packing density of the aggregate-fibre mixture. It was found that the proportional decrease in packing density due to the addition of steel fibres increases linearly with the fibre volume but at different rates for different fibre types and different aggregate sizes. Generally, fibres with larger aspect ratios have larger effect and smaller size aggregates are less affected. Lastly, based on the test results, some useful guidelines and a packing model for the mix design of steel FRC were developed.-
dc.languageeng-
dc.publisherElsevier BV. The Journal's web site is located at http://www.elsevier.com/locate/conbuildmat-
dc.relation.ispartofConstruction and Building Materials-
dc.subjectAggregate-
dc.subjectFibre reinforced concrete (FRC)-
dc.subjectPacking density-
dc.subjectRigid fibres-
dc.titleEffect of rigid fibres on aggregate packing-
dc.typeArticle-
dc.identifier.emailChu, SH: aschu@hku.hk-
dc.identifier.emailKwan, AKH: khkwan@hkucc.hku.hk-
dc.identifier.authorityKwan, AKH=rp00127-
dc.description.naturelink_to_subscribed_fulltext-
dc.identifier.doi10.1016/j.conbuildmat.2019.07.072-
dc.identifier.scopuseid_2-s2.0-85068995654-
dc.identifier.hkuros300780-
dc.identifier.volume224-
dc.identifier.spage326-
dc.identifier.epage335-
dc.publisher.placeNetherlands-

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