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Article: Effects of superplasticiser on rheology and cohesiveness of CSF cement paste

TitleEffects of superplasticiser on rheology and cohesiveness of CSF cement paste
Authors
KeywordsCement paste
Flowability
Fresh properties
Packing density
Saturation dosages
Issue Date2011
PublisherThomas Telford Ltd. The Journal's web site is located at http://www.cement-research.com
Citation
Advances in Cement Research, 2011, v. 24 n. 3, p. 125-137 How to Cite?
AbstractSuperplasticiser (SP) is now an indispensable ingredient for the production of concrete. However, its proper use is a great concern because its over-dosage could lead to drastic reduction in the cohesiveness of concrete. Furthermore, experience has indicated that the SP demand, saturation dosage and dosage causing segregation are highly dependent on the powder content and therefore the effects of SP are not simple functions of dosage. This study aims to evaluate the effects of SP dosage on the fresh properties of cement paste containing condensed silica fume (CSF). A number of cement paste samples with different SP dosages and CSF contents were tested. The results showed that the addition of SP would improve the packing density, flowability and rheology but impair the cohesiveness of cement paste. It would also render the cement paste shear thickening. To cater for the effects of powder fineness, it is proposed that the SP dosage should be measured in terms of the quantity of SP per surface area of the powder content. © 2012 Thomas Telford Ltd.
Persistent Identifierhttp://hdl.handle.net/10722/163828
ISSN
2015 Impact Factor: 0.949
2015 SCImago Journal Rankings: 0.692
ISI Accession Number ID

 

DC FieldValueLanguage
dc.contributor.authorKwan, AKHen_US
dc.contributor.authorChen, JJen_US
dc.contributor.authorFung, WWSen_US
dc.date.accessioned2012-09-20T07:52:23Z-
dc.date.available2012-09-20T07:52:23Z-
dc.date.issued2011en_US
dc.identifier.citationAdvances in Cement Research, 2011, v. 24 n. 3, p. 125-137en_US
dc.identifier.issn0951-7197en_US
dc.identifier.urihttp://hdl.handle.net/10722/163828-
dc.description.abstractSuperplasticiser (SP) is now an indispensable ingredient for the production of concrete. However, its proper use is a great concern because its over-dosage could lead to drastic reduction in the cohesiveness of concrete. Furthermore, experience has indicated that the SP demand, saturation dosage and dosage causing segregation are highly dependent on the powder content and therefore the effects of SP are not simple functions of dosage. This study aims to evaluate the effects of SP dosage on the fresh properties of cement paste containing condensed silica fume (CSF). A number of cement paste samples with different SP dosages and CSF contents were tested. The results showed that the addition of SP would improve the packing density, flowability and rheology but impair the cohesiveness of cement paste. It would also render the cement paste shear thickening. To cater for the effects of powder fineness, it is proposed that the SP dosage should be measured in terms of the quantity of SP per surface area of the powder content. © 2012 Thomas Telford Ltd.-
dc.languageengen_US
dc.publisherThomas Telford Ltd. The Journal's web site is located at http://www.cement-research.comen_US
dc.relation.ispartofAdvances in Cement Researchen_US
dc.rightsPermission is granted by ICE Publishing to print one copy for personal use. Any other use of these PDF files is subject to reprint fees.-
dc.rightsCreative Commons: Attribution 3.0 Hong Kong License-
dc.subjectCement paste-
dc.subjectFlowability-
dc.subjectFresh properties-
dc.subjectPacking density-
dc.subjectSaturation dosages-
dc.titleEffects of superplasticiser on rheology and cohesiveness of CSF cement pasteen_US
dc.typeArticleen_US
dc.identifier.openurlhttp://library.hku.hk:4550/resserv?sid=HKU:IR&issn=0951-7197&volume=24&issue=1&spage=&epage=&date=2011&atitle=Effects+of+superplasticiser+on+rheology+and+cohesiveness+of+CSF+cement+pasteen_US
dc.identifier.emailKwan, AKH: khkwan@hku.hken_US
dc.identifier.authorityKwan, AKH=rp00127en_US
dc.description.naturepublished_or_final_version-
dc.identifier.doi10.1680/adcr.10.00020-
dc.identifier.scopuseid_2-s2.0-84865855060-
dc.identifier.hkuros206099en_US
dc.identifier.volume24en_US
dc.identifier.issue3en_US
dc.identifier.spage125-
dc.identifier.epage137-
dc.identifier.isiWOS:000306504900001-
dc.publisher.placeUnited Kingdom-

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