FINE FRACTION OF IRON ORE TAILINGS AS MINERAL ADDITION IN SELF-COMPACTING MIXTURES
Nome: MARCELLY PIRES DE SOUSA RAMOS CIPRIANO
Data de publicação: 08/02/2024
Banca:
Nome |
Papel |
|---|---|
| ALEXANDRE LIMA DE OLIVEIRA | Examinador Externo |
| AUGUSTO CESAR DA SILVA BEZERRA | Examinador Externo |
| PAULO RICARDO DE MATOS | Examinador Externo |
| RUDIELE APARECIDA SCHANKOSKI | Presidente |
Resumo: Global mining generates approximately 60 billion tons of waste each year, mostly stored in tailings dams, causing environmental damage and threatening nearby communities. To address this issue in alignment with circular economy principles, this study explored using the fine fraction of iron ore tailings (<0.075 mm) as a supplementary material (SCM) for producing self-compacting mixtures, which require a substantial fines content. The study assessed mortars with 10%, 20%, and 30% mining filler (MF) replacing cement, comparing them to equivalent limestone filler (LF) mixtures and a reference without additives. The properties of the SCMs were assessed using X-ray diffraction, X-ray fluorescence, laser granulometry, scanning electron microscopy, methylene blue test, R3 test, and furnace-based gravimetry test. Fresh state analysis on mortars included specific gravity, flow table, and mini V-funnel tests. In the hardened state, tests covered
