The Effect of Aluminium Dross on Fired Brick Products

Hamza, Alexandra and Kocserha, István and Simon, Andrea (2020) The Effect of Aluminium Dross on Fired Brick Products. Materials Science and Engineering, 45 (1). pp. 106-114. ISSN 2063-6792

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Abstract

In this research, the usability of aluminium dross – an industrial by-product – as an additive for the brick industry was investigated. Brick clay was used to prepare the mix-tures, to which different amounts (6–24 wt%) of dross were added. The optimal moisture content (20 wt%) required for forming was determined in preliminary experiments. Volume and weight changes during drying and firing were calculated. Compressive strength, bulk density and water absorption tests were performed on the fired samples. As the most often used additives of the brick industry (e.g. sawdust and petroleum coke) may interact with a possible new additive during firing, mixtures containing 3.35 wt% sawdust and 1 wt% petro-leum coke were also prepared. Our results showed that increasing the amount of dross re-duced drying and firing shrinkage as well as body density, but increased water absorption. Compressive strength varied inversely to the dross content.

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