Table 1.
Chemical composition and physical properties of cementitious materials *.
| Materials | OPC | SF | FA | GGBFS | |
|---|---|---|---|---|---|
| SiO2 (wt%) | 21.00 | 95.30 | 53.97 | 42.00 | |
| Al2O3 (wt%) | 5.40 | 1.20 | 31.15 | 16.00 | |
| Fe2O3 (wt%) | 2.80 | 0.90 | 4.16 | - | |
| CaO (wt%) | 64.68 | 0.40 | 4.01 | 40.00 | |
| MgO (wt%) | 1.40 | 0.80 | 1.01 | - | |
| SO3 (wt%) | 2.19 | - | 0.73 | 1.72 | |
| K2O (wt%) | - | 2.04 | - | ||
| Na2O (wt%) | 1.10 | 0.89 | - | ||
| TiO2 (wt%) | - | 1.13 | - | ||
| P2O5 (wt%) | - | 0.67 | - | ||
| Cl (wt%) | 0.01 | - | 0.13 | 0.05 | |
| NiO (wt%) | - | 0.11 | - | ||
| Loss on ignition (g) | 2.52 | 0.30 | - | 0.23 | |
| Blaine surface area (m2/kg) | 357 | - | 330 | 418 | |
| BET surface area (m2/kg) | - | 19,500 | - | - | |
| Specific gravity (kg/m3) | 3140 | 2200 | 2280 | 2900 | |
| Setting time (min) | Initial | 203 | - | - | - |
| Final | 250 | - | - | - | |
| Compressive strength (MPa) | 3d | 27.40 | - | - | - |
| Flexural strength (MPa) | 3d | 5.90 | - | - | - |
* OPC: ordinary Portland cement; SF: silca fume; FA: fly ash; GGBFS: ground granulated blast furnace slag.