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https://hdl.handle.net/1822/58931
Título: | Investigations of geopolymeric mixtures based on phosphate washing waste |
Autor(es): | Dabbebi, R. Baklouti, S. Aguiar, J. L. Barroso de Pacheco-Torgal, F. Samet, B. |
Palavras-chave: | Geopolymer Phosphate washing waste Sodium hydroxide Sodium silicate |
Data: | Dez-2018 |
Editora: | Elsevier 1 |
Revista: | Science and Technology of Materials |
Citação: | Dabbebi R., s. Baklouti, Aguiar J. B., Pacheco-Torgal F., Samet B. Investigations of geopolymeric mixtures based on phosphate washing waste, Science and Technology of Materials, Vol. 30, pp. 1-5, doi:10.1016/j.stmat.2018.08.001, 2018 |
Resumo(s): | The extraction of the phosphate ore produces a high amount of waste causing serious environmental problems. This waste, termed as phosphate washing waste, was filtered and dried at 105 °C for 24 h to remove the water. The dried waste was milled and then sieved in a 100 ?m sieve. The resulting phosphates washing waste (PWW) particles size are below 70 ?m. The phosphate washing waste was calcined at 700 °C and 900 °C. Both calcined and uncalcined waste were investigated with X-ray fluorescence (XRF), X-ray powder diffraction (DRX), Fourier transform infrared (FTIR), simultaneous differential thermal and thermogravimetric analyses (DTA-TG) and particle size analysis. This waste was activated with sodium hydroxide (NaOH) and sodium silicate in order to produce geopolymeric materials. The influence of replacing PWW by 15% of metakaolin was also study. The results show that the highest compressive strength is obtained with metakaolin. The results also showed that compressive strength decreased with the increase of NaOH concentration. |
Tipo: | Artigo |
URI: | https://hdl.handle.net/1822/58931 |
DOI: | 10.1016/j.stmat.2018.08.001 |
ISSN: | 2603-6363 |
Versão da editora: | https://www.sciencedirect.com/science/article/pii/S2603636318300526 |
Arbitragem científica: | yes |
Acesso: | Acesso aberto |
Aparece nas coleções: | C-TAC - Artigos em Revistas Internacionais |
Ficheiros deste registo:
Ficheiro | Descrição | Tamanho | Formato | |
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2939-2018_Science and Technology of Materials.pdf | 932,73 kB | Adobe PDF | Ver/Abrir |