Shrinkage modelling for recycled aggregate concretes

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Show simple item record Cabral, Eduardo en_US Schalch, V en_US Molin, Dan en_US Ribeiro, J L D en_US Sri Ravindrarajah, Rasiah en_US
dc.contributor.editor en_US 2011-02-07T06:23:29Z 2011-02-07T06:23:29Z 2010 en_US
dc.identifier 2009003506 en_US
dc.identifier.citation Cabral Eduardo et al. 2010, 'Shrinkage modelling for recycled aggregate concretes', Brazilian Concrete Institute, vol. 3, no. 1, pp. 1-23. en_US
dc.identifier.issn 1983-4195 en_US
dc.identifier.other C1 en_US
dc.description.abstract Concerns with conservation of nonrenewable resources are propelling academic research regarding the use of recycled aggregates in concrete production. Concretea??s shrinkage is a phenomenon intimately linked to concrete loss of water, which is almost inevitable, since the majority of concrete structures is exposed to an environment where atmospheric humidity is below saturation condition. This paper presents an experimental study where concretes were produced varying water/cement ratio (from 0.4 to 0.8) and type and proportion of construction & demolition waste (concrete, cement, and red ceramic) used as coarse and fine recycled aggregates. Mathematical models correlating such variables with concretea??s shrinkage at 56 and 224 days of age were built. The results indicate that, for the age of 56 days, the data presented excessive variability, revealing only 4 of the 7 tested variables as significant. For the age of 224 days, the proposed model still presented considerable variability, however all tested variables were detected as significant. Results point out that substitution of natural aggregates by recycled aggregates increases shrinkage, being this effect stronger when substitution comprises fine aggregates. The most pronounced effect was associated to the use of recycled concrete fine aggregate. The slightest effect was observed using recycled concrete coarse aggregate. en_US
dc.language en_US
dc.publisher Brazilian Concrete Institute en_US
dc.title Shrinkage modelling for recycled aggregate concretes en_US
dc.parent IBRACON Structures and Materials Journal en_US
dc.journal.volume 3 en_US
dc.journal.number 1 en_US
dc.publocation Brasil en_US
dc.identifier.startpage 1 en_US
dc.identifier.endpage 23 en_US FEIT.School of Civil and Environmental Engineering en_US
dc.conference Verified OK en_US
dc.for 090503 en_US
dc.personcode 0000060859 en_US
dc.personcode 0000060860 en_US
dc.personcode 0000060861 en_US
dc.personcode 0000060862 en_US
dc.personcode 880627 en_US
dc.percentage 100 en_US Construction Materials en_US
dc.classification.type FOR-08 en_US
dc.edition en_US
dc.custom en_US en_US
dc.location.activity en_US
dc.description.keywords recycled aggregate concrete, shrinkage, multiple regression en_US
dc.staffid en_US
dc.staffid 880627 en_US

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