Utilize este identificador para referenciar este registo: http://hdl.handle.net/10400.21/5059
Título: The effect of superplasticizers on the mechanical performance of concrete made with fine recycled concrete aggregates
Autor: Pereira, P.
Evangelista, Luís Manuel Faria da Rocha
Brito, Jorge Manuel Caliço Lopes de
Palavras-chave: Fine Recycled Aggregate
Superplasticizers
Concrete
Tensile Strength
Modulus of Elasticity
Abrasion
Abrasion resistance
Compressive strength
Coarse
Durability
Prediction
Behavior
Data: Out-2012
Editora: Elsevier Sci LTD
Citação: PEREIRA, P.; EVANGELISTA, L.; BRITO, J. de - The effect of superplasticizers on the mechanical performance of concrete made with fine recycled concrete aggregates. Cement & Concrete Composites. Vol. 34, nr. 9 (2012), pp. 1044-1052
Resumo: It is considered that using crushed recycled concrete as aggregate for concrete production is a viable alternative to dumping and would help to conserve abiotic resources. This use has fundamentally been based on the coarse fraction because the fine fraction is likely to degrade the performance of the resulting concrete. This paper presents results from a research work undertaken at Institut Superior Tecnico (IST), Lisbon, Portugal, in which the effects of incorporating two types of superplasticizer on the mechanical performance of concrete containing fine recycled aggregate were evaluated. The purpose was to see if the addition of superplasticizer would offset the detrimental effects associated with the use of fine recycled concrete aggregate. The experimental programme is described and the results of tests for splitting tensile strength, modulus of elasticity and abrasion resistance are presented. The relative performance of concrete made with recycled aggregate was found to decrease. However, the same concrete with admixtures in general exhibited a better mechanical performance than the reference mixes without admixtures or with a less active superplasticizer. Therefore, it is argued that the mechanical performance of concrete made with fine recycled concrete aggregates can be as good as that of conventional concrete, if superplasticizers are used to reduce the water-cement ratio of the former concrete.
Peer review: yes
URI: http://hdl.handle.net/10400.21/5059
DOI: 10.1016/j.cemconcomp.2012.06.009
ISSN: 0958-9465
Aparece nas colecções:ISEL - Eng. Civil - Artigos



FacebookTwitterDeliciousLinkedInDiggGoogle BookmarksMySpace
Formato BibTex MendeleyEndnote Degois 

Todos os registos no repositório estão protegidos por leis de copyright, com todos os direitos reservados.