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Synthesis of nano-alumina and their effect on structure, mechanical and thermal properties of geopolymer

Zeineb ZidiLaboratoire de Physique des Matériaux et des Nanomatériaux appliquée à l’Environnement, Université de Gabés, Faculté des Sciences de Gabés, Cité Erriadh Manara Zrig, 6072, Gabés, TunisieMounir LtifiCollege of Engineering, Department of Civil Engineering, Al-Imam Mohammad Ibn Saud Islamic University, Riyadh, Saudi ArabiaZ. Ben AyadiLaboratoire de Physique des Matériaux et des Nanomatériaux appliquée à l’Environnement, Université de Gabés, Faculté des Sciences de Gabés, Cité Erriadh Manara Zrig, 6072, Gabés, TunisieL. El MirLaboratoire de Physique des Matériaux et des Nanomatériaux appliquée à l’Environnement, Université de Gabés, Faculté des Sciences de Gabés, Cité Erriadh Manara Zrig, 6072, Gabés, Tunisie

2019en

ABI

Annotatsiya

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.

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Identifikatorlar

DOI: 10.1080/21870764.2019.1676498

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