Utilize este identificador para referenciar este registo: http://hdl.handle.net/10400.21/3828
Título: A New Method to Determine the Density and Water Absorption of Fine Recycled Aggregates
Autor: Rodrigues, Fernando
Evangelista, Luís
Brito, Jorge de
Palavras-chave: Fine recycled aggregates
Water absorption
Data: Set-2013
Editora: Universidade Federal de São Carlos
Citação: RODRIGUES, Fernando; EVANGELISTA, Luis; BRITO, Jorge de - A New Method to Determine the Density and Water Absorption of Fine Recycled Aggregates. Materials Research-Ibero-American Journal of Materials. Vol. 16, nr. 5 (2013), p. 1045-1051.
Resumo: The construction industry keeps on demanding huge quantities of natural resources, mainly minerals for mortars and concrete production. The depletion of many quarries and environmental concerns about reducing the dumping of construction and demolition waste in quarries have led to an increase in the procuring and use of recycled aggregates from this type of waste. If they are to be incorporated in concrete and mortars it is essential to know their properties to guarantee the adequate performance of the end products, in both mechanical and durability-related terms. Existing regulated tests were developed for natural aggregates, however, and several problems arise when they are applied to recycled aggregates, especially fine recycled aggregates (FRA). This paper describes the main problems encountered with these tests and proposes an alternative method to determine the density and water absorption of FRA that removes them. The use of sodium hexametaphosphate solutions in the water absorption test has proven to improve its efficiency, minimizing cohesion between particles and helping to release entrained air.
Peer review: yes
URI: http://hdl.handle.net/10400.21/3828
DOI: 10.1590/S1516-14392013005000074
ISSN: 1516-1439
Aparece nas colecções:ISEL - Eng. Civil - Artigos

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