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Article: Effect of paste volume on fresh and hardened properties of concrete

TitleEffect of paste volume on fresh and hardened properties of concrete
Authors
KeywordsPaste volume
Cement content
Fresh and hardened properties
Packing
Mortar film thickness
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. 218, p. 284-294 How to Cite?
AbstractWater to cement (W/C) ratio has been deemed as one of the most important factors affecting the properties of concrete. However, at constant W/C ratio, cement or cementitious paste volume (CPV) also plays an important role, yet limited research has been done to quantify and unveil the mechanism behind. In this study, the effect of CPV on various performance attributes of concrete at fresh and hardened states was evaluated by varying the CPV from 26% to 32% at two different W/C ratios. Based on the tests results and inter-relationships among them, it was found that decreasing the CPV, i.e., reducing the cement content at constant W/C ratio, would decrease the uncompacted wet density while increase the compacted wet density, increase the strength at all curing ages, increase the Young’s modulus, flexural strength and splitting tensile strength, and improve the quality of concrete, albeit the decrease of workability that could be compensated by increasing the superplasticizer dosage or adding fillers. Moreover, mechanisms behind these phenomena have also been revealed from the perspective of mortar film thickness. The work presented herein should be meaningful in the development of eco-friendly high performance concrete.
Persistent Identifierhttp://hdl.handle.net/10722/272876
ISSN
2017 Impact Factor: 3.485
2015 SCImago Journal Rankings: 1.606

 

DC FieldValueLanguage
dc.contributor.authorChu, SH-
dc.date.accessioned2019-08-06T09:18:13Z-
dc.date.available2019-08-06T09:18:13Z-
dc.date.issued2019-
dc.identifier.citationConstruction and Building Materials, 2019, v. 218, p. 284-294-
dc.identifier.issn0950-0618-
dc.identifier.urihttp://hdl.handle.net/10722/272876-
dc.description.abstractWater to cement (W/C) ratio has been deemed as one of the most important factors affecting the properties of concrete. However, at constant W/C ratio, cement or cementitious paste volume (CPV) also plays an important role, yet limited research has been done to quantify and unveil the mechanism behind. In this study, the effect of CPV on various performance attributes of concrete at fresh and hardened states was evaluated by varying the CPV from 26% to 32% at two different W/C ratios. Based on the tests results and inter-relationships among them, it was found that decreasing the CPV, i.e., reducing the cement content at constant W/C ratio, would decrease the uncompacted wet density while increase the compacted wet density, increase the strength at all curing ages, increase the Young’s modulus, flexural strength and splitting tensile strength, and improve the quality of concrete, albeit the decrease of workability that could be compensated by increasing the superplasticizer dosage or adding fillers. Moreover, mechanisms behind these phenomena have also been revealed from the perspective of mortar film thickness. The work presented herein should be meaningful in the development of eco-friendly high performance concrete.-
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.subjectPaste volume-
dc.subjectCement content-
dc.subjectFresh and hardened properties-
dc.subjectPacking-
dc.subjectMortar film thickness-
dc.titleEffect of paste volume on fresh and hardened properties of concrete-
dc.typeArticle-
dc.identifier.emailChu, SH: aschu@hku.hk-
dc.description.naturelink_to_subscribed_fulltext-
dc.identifier.doi10.1016/j.conbuildmat.2019.05.131-
dc.identifier.scopuseid_2-s2.0-85066037979-
dc.identifier.hkuros300779-
dc.identifier.volume218-
dc.identifier.spage284-
dc.identifier.epage294-
dc.publisher.placeNetherlands-

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