Ouellet-Plamondon, C., David, E. et Brisebois, P..
2024.
« Dielectric properties of fly ash geopolymers ».
In 78th RILEM Annual Week & RILEM Conference on Sustainable Materials & Structures: Meeting the Major Challenges of the 21st Century - SMS 2024 (Toulouse, France, Aug. 25-30, 2024)
RILEM.
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Résumé
Alkali-activated materials made with fly ash and potassium activator have sensing properties. This article studies their dielectric behavior and compares the material properties when activated with potassium hydroxide and potassium carbonate. The complex dielectric permittivity of the samples was measured through broadband dielectric spectroscopy. Isothermal measurements were conducted through a frequency range from 0.1 to 106 Hz, consecutively performed at different temperatures by increasing the temperature from -125°C to 75°C with discrete steps. The study identifies two relaxation mechanisms, one caused by the weakly bound water. The impact of the free water is so strong that it is not possible to clearly distinguish the two alkaline activators without further studies.
| Type de document: | Compte rendu de conférence |
|---|---|
| Professeur: | Professeur Ouellet-Plamondon, Claudiane |
| Affiliation: | Génie de la construction |
| Date de dépôt: | 05 juin 2025 15:53 |
| Dernière modification: | 30 août 2025 04:00 |
| URI: | https://espace2.etsmtl.ca/id/eprint/30988 |
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