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Characteristics of cement, SF, and recycled fillers_
| Designations | CEM II 52.5 | SF | BF | CF |
|---|---|---|---|---|
| Absolute density (g/cm3) | 3.10 | 2.24 | 2.88 | 2.92 |
| Specific surface (cm2/g) | 3,800 | 220,000 | 3,300 | 5,177 |
| CaO (%) | 61.69 | 0.5 | 43.30 | 1.52 |
| Al2O3 (%) | 5.37 | 0.5 | 7.19 | 21.90 |
| Fe2O3 (%) | 3.00 | 1 | 1.69 | 0.6 |
| SiO2 (%) | 19.34 | 95 | 38.14 | 76.86 |
| MgO (%) | 1.80 | 1 | 5.25 | 0.28 |
| Na2O (%) | 0.14 | 0.60 | 0.20 | 1.11 |
| K2O (%) | 0.76 | — | 0.65 | — |
| Cl− (%) | 0.027 | — | — | — |
| SO3 (%) | 2.20 | — | 0.34 | |
| Free CaO (%) | 0.97 | — | — | — |
| C3S (%) | 58.3 | — | ||
| C2S (%) | 14.6 | — | ||
| C3A (%) | 8.7 | — | ||
| C4AF (%) | 11.26 | — |
Mixture composition_
| CEM II (kg/m3) | SF (kg/m3) | DS (kg/m3) | FPP (kg/m3) | SP (kg/m3) | W (kg/m3) | BF (kg/m3) | CF (kg/m3) | |
|---|---|---|---|---|---|---|---|---|
| CC | 1,000 | 75 | 999 | 1 | 20 | 250 | — | — |
| CCF | 1,000 | 75 | 816 | 1 | 20 | 250 | — | 200 |
| CBF | 1,000 | 75 | 814 | 1 | 20 | 250 | 200 | — |