Mechanical and microstructural properties of iron mining tailings stabilized with alkali-activated binder produced from agro-industrial wastes
oleh: William Mateus Kubiaki Levandoski, Suéllen Tonatto Ferrazzo, Giovani Jordi Bruschi, Nilo Cesar Consoli, Eduardo Pavan Korf
| Format: | Article |
|---|---|
| Diterbitkan: | Nature Portfolio 2023-09-01 |
Deskripsi
Abstract This study evaluated the stabilization of iron ore tailings (IOTs) with an alkali-activated binder (AAB) produced from sugar cane bagasse ash, hydrated eggshell lime, and sodium hydroxide solution. Unconfined compressive strength, split tensile strength, initial shear stiffness, mineralogy, chemical composition, and microstructure of IOTs-AAB were evaluated. Strength values up to 6.59 MPa were achieved after 28 days-curing at 40 °C. Reducing porosity and increasing the binder content improved the overall mechanical behavior. N-A-S-H like gels were identified in IOTs-AAB mixtures. Finally, longer curing times led to more compact structures.