Data/hora: 21/06/2024 05:19:13

Biblioteca(s): | Embrapa Florestas.
Data corrente: | 03/10/2019
Data da última atualização: | 03/10/2019
Autoria: | ALEKSEEV, K.; MYMRIN, V.; AVANCI, M. A.; KLITZKE, W.; MAGALHAES, W. L. E.; ZANONI, P. R. S.; CATAI, R. E.; SILVA, D. A.; FERRAZ, F. A.
Afiliação: | Kirill Alekseev, UTFPR; Vsevolod Mymrin, UTFPR; Monica A. Avanci, UTFPR; Walderson Klitzke, UFPR; WASHINGTON LUIZ ESTEVES MAGALHAES, CNPF; PATRICIA RAQUEL SILVA ZANONI, CNPF; Rodrigo E. Catai, UTFPR; Dimas A. Silva, UFPR; Fernando A. Ferraz, UFPR.
Título: | Environmentally clean construction materials from hazardous bauxite waste red mud and spent foundry sand.
Ano de publicação: | 2019
Fonte/Imprenta: | Construction and Building Materials, v. 229, article 116860, Dec. 2019. 9 p.
DOI: | 10.1016/j.conbuildmat.2019.116860
Idioma: | Inglês
Conteúdo: | This paper demonstrates the possibility of producing new red ceramics composites from red mud of hazardous bauxite waste (50?100 wt%), and foundry sand (10?50%) replacing the traditional clay-sand mix and preventing the environment pollution by such industrial wastes. The newly developed environment-friendly ceramics exhibit high physical properties (flexural strength, linear shrinkage, water absorption, and density). The ceramics? analysis by X-rays fluorescence, X-rays diffractometry, atom absorption spectroscopy, scanning electron microscopy, energy-dispersion spectroscopy, and laser micro-mass analysis revealed the synthesis of mainly glass-like structures with a small inclusion of crystalline structures. The values of flexural strength reached 10.54 MPa; after sintering at 1150 C, linear shrinkage varied between 6.62 and 7.92%, water absorption ? 2.77 and 14.41% and bulk density ? 1.65 and 2.07 g/cm3. The most valuable property of the developed materials is the ecological purity due to the heavy metal?s complete neutralization from both industrial wastes.
Palavras-Chave: | Absorption spectroscopy; Bayer process's red mud utilization; Ceramic materials; Contração; Environmentally clean construction materials; Espectroscopia de absorção; Mainly vitreous structure formation; Material cerâmico; Resistência à flexão; Sintering; Sintering till 1150 °C; Sinterização; Spent foundry sand.
Thesagro: | Resíduo Industrial.
Thesaurus Nal: | Bending strength; Industrial wastes; Shrinkage.
Categoria do assunto: | X Pesquisa, Tecnologia e Engenharia
Registro original: | Embrapa Florestas (CNPF)
Exemplares: | CNPF - (56968-1) - UPC - AP - DD -  -  -  - DIS