| TRAC | Recycled aggregate concrete containing iron ore tailings |
| IOTs | Iron ore tailings |
| NCA | Natural coarse aggregate |
| NAC | Natural aggregate concrete |
| RCA | Recycled coarse aggregate |
| RAC | Recycled aggregate concrete |
| ITZ | Interfacial transition zone |
| SEM | Scanning electron microscope |
| C-S-H | Calcium silicate hydrate |
| AFm | Monosulfate calcium sulfoaluminate hydrate |
| NMR | Nuclear magnetic resonance |
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