Fly ash of mineral coal as ceramic tiles raw material

• Published in: Waste management (Elmsford) Vol. 27; no. 1; pp. 59 - 68
• Main Authors: Zimmer, A., Bergmann, C.P.
• Format: Journal Article
• Language: English
• Published: Oxford Elsevier Ltd 2007; New York, NY Elsevier Science
• Subjects: Aluminum Silicates; Applied sciences; Calcium Carbonate; Carbon; Ceramics - chemistry; Coal; Coal Ash; Conservation of Natural Resources; Exact sciences and technology; Other wastes and particular components of wastes; Particulate Matter; Pollution; Potassium Compounds; Waste Management; Wastes; Brazil, Santa Catarina; Fly ash; Batchwise; Ash content; Raw materials; Urban area; ISO standard; Chemical properties; Ceramic materials
• ISSN: 0956-053X; 1879-2456
• DOI: 10.1016/j.wasman.2006.01.009

The aim of this work was to evaluate the use of mineral coal fly ash as a raw material in the production of ceramic tiles. The samples of fly ash came from Capivari de Baixo, a city situated in the Brazilian Federal State of Santa Catarina. The fly ash and the raw materials were characterized regarding their physical chemical properties, and, based on these results; batches containing fly ash and typical raw materials for ceramic tiles were prepared. The fly ash content in the batches varied between 20 and 80 wt%. Specimens were molded using a uniaxial hydraulic press and were fired. All batches containing ash up to 60 wt% present adequate properties to be classified as several kinds of products in the ISO 13006 standard ( ISO, 1998) regarding its different absorption groups (pressed). The results obtained indicate that fly ash, when mixed with traditional raw materials, has the necessary requirements to be used as a raw material for production of ceramic tiles.