Please use this identifier to cite or link to this item: http://hdl.handle.net/1822/17733

TitleIncorporation feasibility of leather residues in bricks
Author(s)Aguiar, J. L. Barroso de
Valente, A.
Pires, M. J.
Tavares, M. T.
KeywordsResidues
Leather
Bricks
Toxicity
Leaching
Compressive strength
Flexural strength
Issue date2001
Abstract(s)The footwear industry has strips of leather as one of its by-products. These leather residues, due to their high chromium content, can be regarded as a threat to the environment, particularly if no care is taken with their disposal. With the incorporation of the residues in ceramic products, after trituration, is possible to neutralise the eventual toxicity of chromium. In a laboratory study we produced prismatic bricks using clay from the region and incorporating 1, 3 and 5% (by mass) of leather residues. This corresponds at about 20, 60 and 100% (by apparent volume). The moulds were filled up with paste and, in order to have some compactness, the ceramic paste was compressed with a spatula. After that, it began the process of drying and burning the bricks. They were tested to flexure, compression and leaching. The results showed that the toxicity of chromium disappeared in the bricks. The mechanical tests showed a decrease in strength for the specimens with leather residue. The compressive strength decreases about 22% for 1% of incorporation of leather residue. However, as bricks were lighter and more porous, we can expect that they are better for thermal isolation.
TypeConference paper
URIhttp://hdl.handle.net/1822/17733
Peer-Reviewedyes
AccessOpen access
Appears in Collections:C-TAC - Comunicações a Conferências Internacionais

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