Research Article
Optimization of Arabian-Shield-Based Natural Pozzolan and Silica Fume for High-Performance Concrete Using Statistical Design of Experiments
Table 1
Physicochemical properties of the CMs.
| | | PC | SF | NP |
| | Physical properties | | Bulk density (kg/m3) | 1362 | 1350–1410 | 2600–2700 | | Specific gravity (g/m3) | 3.14 | 2.0 | — | | Fineness (m2kg−1) | 371 | 15–20 | <1000 | | Average particle size (m) | — | 0.15 | 10–15 |
| | Compressive strength (MPa), 50 mm cubes | | 03 days | 19.4 | — | — | | 07 days | 24.9 | — | — | | 28 days | 35.7 | — | — |
| | Chemical composition (%) | | SiO2 | 20.9 | 90.0 | 42.09 | | Al2O3 | 5.2 | 1.0 | 16.43 | | Fe2O3 | 2.3 | 1.0 | 14.97 | | MgO | 2.8 | 0.6 | 3.47 | | CaO | 64.4 | 0.3 | 9.51 | | SO3 | 2.9 | 0.3 | 0.19 | | LOI | 1.0 | — | 2.70 | | Insoluble residue | 0.2 | — | — |
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