Synthesis of nano-alumina and their effect on structure, mechanical and thermal properties of geopolymer
| Autor: | Z. Zidi, M. Ltifi, Z. Ben Ayadi, L. El Mir |
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| Jazyk: | angličtina |
| Rok vydání: | 2019 |
| Předmět: | |
| Zdroj: | Journal of Asian Ceramic Societies, Vol 7, Iss 4, Pp 524-535 (2019) |
| Druh dokumentu: | article |
| ISSN: | 2187-0764 21870764 |
| DOI: | 10.1080/21870764.2019.1676498 |
| Popis: | This paper reports on a study of the effects of nano-alumina on the structural, mechanical and thermal properties of geopolymer matrices. Sample composites were produced by mixing metakaolin, an alkaline solution and nano-alumina (1%, 2% and 3%) with a constant L/S ratio 0.55. The resulting products were investigated by XRD, XRF, FTIR, SEM, MIP, TG/DTA and a compressive strength test. The results showed that the insertion of nano-alumina powder improves geopolymer strength. From FTIR and XRD spectra, we found that the structure and geopolymer gel content were enhanced, especially for the optimized proportion of nano alumina (2%), leading to a more homogenous structure, as shown in SEM images. Thus, the density and water absorption of the nano-alumina geopolymer mixture were improved. The introduction of the nano-alumina also had the effect on the thermal properties of the geopolymers, of increasing the weight loss of the composite. |
| Databáze: | Directory of Open Access Journals |
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