Di Mare, Michael et Ouellet-Plamondon, Claudiane M..
2023.
« High-strength construction material from raw bauxite residue by one-step alkali activation ».
Journal of Sustainable Metallurgy, vol. 9, nº 1.
pp. 46-51.
Compte des citations dans Scopus : 2.
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Résumé
An alkali-activated material composed of 77% raw, unmodified bauxite residue has been developed that meets the mechanical strength standards for construction materials. This can solve the circularity gap in aluminum production by providing a means to valorize bauxite residue in large volumes in the construction sector. This environmentally friendly building material leverages a novel one-step mixing process to dramatically increase the proportion of bauxite residue contained in the material without the need for calcination. The alkali-activated material achieves over 30 MPa of strength after 3 days of curing, satisfying the ASTM standards for precast structural members. The microstructure has been characterized by mercury intrusion porosimetry and isothermal nitrogen adsorption. The leaching of metallic and nonmetallic pollutants from the material is substantially below the maximum allowable concentration in Quebec, Canada, the origin of the bauxite residue. This alkali-activated material is a circular economy solution to valorize large contents of bauxite residue in construction applications such as retaining wall members, underground utility lines, and other infrastructure while reducing the environmental impact of the aluminum industry.
| Type de document: | Article publié dans une revue, révisé par les pairs |
|---|---|
| Professeur: | Professeur Ouellet-Plamondon, Claudiane |
| Affiliation: | Génie de la construction |
| Date de dépôt: | 21 déc. 2022 21:55 |
| Dernière modification: | 17 janv. 2025 19:16 |
| URI: | https://espace2.etsmtl.ca/id/eprint/26008 |
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