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Performance estimation for concretes made with recycled aggregates of construction and demolition waste of some Brazilian cities

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Performance estimation for concretes made with recycled aggregates of construction and demolition waste of some Brazilian cities

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Título Performance estimation for concretes made with recycled aggregates of construction and demolition waste of some Brazilian cities
Autor Cabral, Antonio Eduardo Bezerra
Schalch, Valdir
Dal Molin, Denise Carpena Coitinho
Ribeiro, Jose Luis Duarte
Abstract The aim of this paper is to verify the influence of composition variability of recycled aggregates (RA) of construction and demolition wastes (CDW) on the performance of concretes. Performance was evaluated building mathematical models for compressive strength, modulus of elasticity and drying shrinkage. To obtain such models, an experimental program comprising 50 concrete mixtures was carried out. Specimens were casted, tested and results for compressive strength, modulus of elasticity and drying shrinkage were statistically analyzed. Models inputs are CDW composition observed at seven Brazilian cities. Results confirm that using RA from CDW for concrete building is quite feasible, independently of its composition, once compressive strength and modulus of elasticity still reached considerable values. We concluded the variability presented by recycled aggregates of CDW does not compromise their use for concrete building. However, this information must be used with caution, and experimental tests should always be performed to certify concrete properties.
Contido em Materials research : ibero-american journal of materials. São Carlos. Vol. 15, no. 6 (2012), p. 1037-1044
Assunto Concreto
Elasticidade
Modelos matemáticos
Resíduos da construção civil
Resistência à compressão
Secagem
[en] CDW
[en] Concrete
[en] Recycled aggregate
[en] Waste variability
Origem Nacional
Tipo Artigo de periódico
URI http://hdl.handle.net/10183/114997
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