Study of mixtures using simplex design for the addition of chamotte in clay bricks

The red clay ceramic industry is associated with several environmental damages, from the extraction of natural resources as raw materials to the generation of high amounts of waste. This study proposed the incorporation of the ceramic bricks waste (chamotte) in ceramic mixtures for the production of...

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Bibliographic Details
Published in:International journal of applied ceramic technology 2019-11, Vol.16 (6), p.2349-2361
Main Authors: Medeiros, Verônica S. Costa, Pedroti, Leonardo Gonçalves, Mendes, Beatryz Cardoso, Pitanga, Heraldo Nunes, Silva, Taciano Oliveira da
Format: Article
Language:English
Subjects:
Bricks
ceramic engineering
Ceramics industry
Chamotte
characterization
Clay
Compressive strength
Design of experiments
Firing
mechanical properties
Natural resources
Porosity
Raw materials
Response surface methodology
Shrinkage
Statistical analysis
Water absorption
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Summary:The red clay ceramic industry is associated with several environmental damages, from the extraction of natural resources as raw materials to the generation of high amounts of waste. This study proposed the incorporation of the ceramic bricks waste (chamotte) in ceramic mixtures for the production of clay bricks. In order to define the greater content of chamotte, which can be added maintaining the technical qualities required for the product, the experimental design of mixtures was used, with the production of bricks containing the chamotte and two other clayey materials. The compositions were subjected to firing at 850, 950, and 1050°C. The properties of firing linear shrinkage, apparent specific mass, water absorption, apparent porosity, and axial compressive strength were evaluated. It was observed that chamotte (C) contributed to the improvement of some of these properties, such as linear shrinkage. Overlapping the response surfaces obtained in the statistical analysis, the optimal chamotte (C) content was determined for each firing temperature. It was concluded that the incorporation of up to 30% chamotte (C) is technically feasible considering the evaluated temperature range. In this way, there is a product that adds both sustainability and technical performance to the ceramic industry.
ISSN:1546-542X
1744-7402
DOI:10.1111/ijac.13346