Please use this identifier to cite or link to this item: http://repositorio.ufpa.br/jspui/handle/2011/6997
metadata.dc.type: Artigo de Periódico
Issue Date: Jun-2012
metadata.dc.creator: OLIVEIRA, Dênio Ramam Carvalho de
ROSSI, Carlos Rodrigo Costa
Title: Concretes with red mud coarse aggregates
Citation: OLIVEIRA, Dênio Ramam Carvalho de; ROSSI, Carlos Rodrigo Costa. Concretes with red mud coarse aggregates. Materials Research, São Carlos, v. 15, n. 3, p. 333-340, jun. 2012. Disponível em: <http://www.scielo.br/pdf/mr/v15n3/aop_0978-11.pdf>. Acesso em: 13 nov. 2015. <http://dx.doi.org/10.1590/S1516-14392012005000033>.
Abstract: Red mud (RM) is a mineral waste, residue of the Bayer process used to obtain alumina from bauxite. While the exploration of rolled pebble damages the environment and is much more controlled by the government, the huge RM disposal areas do not stop increasing and polluting soil, rivers and groundwater sources in Amazon. In this work, the material mixtures used to produce coarse aggregates presented up to 80% of RM, 30% of metakaolin and 30% of active silica as recycled waste. Several tests were carried out to determine the aggregates physical properties and to evaluate the mechanical performance of the concretes with the new aggregates, including hydraulic abrasion strength, and the results were compared to the reference ones, i.e. rolled pebble concretes. Additionally, the sintering process neutralizes any toxic substance as occur in some RM products like tiles and bricks, and these results have encouraged an industrial or semi-industrial production of RM aggregates for concretes.
Keywords: Resíduos sólidos
Bauxita
Lama vermelha
Agregados (Materiais de construção)
Concreto
Abrasão hidráulica
Degradação ambiental
Amazônia brasileira
ISSN: 1516-1439
metadata.dc.rights: Acesso Aberto
Appears in Collections:Artigos Científicos - FEC/ITEC

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