Research Article
Strength and Durability Performance of Alkali-Activated Rice Husk Ash Geopolymer Mortar
Table 2
Chemical composition and physical properties of OPC and RHA.
| Compound (%) | OPC | RHA |
| SiO2 | 20.90 | 90.79 | Al2O3 | 5.40 | 2.22 | Fe2O3 | 4.60 | 0.80 | CaO | 63.50 | 0.92 | MgO | 0.60 | 0.47 | SO3 | 2.60 | — | Na2O | 0.15 | 0.50 | K2O | 0.25 | 0.30 | LOI | 2.00 | 4.00 | Specific gravity | 3.15 | 2.26 | Average particle size (μ) | 45.34 | 25.42 | Colour | Grey | Grey |
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