Research Article
Solidification and Leachability of Cr (VI) in Rice Husk Ash-Blended Cement
Table 1
Physical and chemical analysis of Portland cement and rice husk ash.
| | Properties | Portland cement (43 G) | Rice husk ash |
| | Specific gravity (kg/cm3) | 3.14 | 2.04 | | Insoluble residue (%) | 1.3 | — | | Alkalies (%) | 0.35 | 2.64 | | SO3 (%) | 2.10 | — | | Chloride (%) | 0.012 | — | | LOI (%) | 1.51 | 1.20 | | Surface area (m2/kg) | 308 | 22,000 | | Silica content (%) | 20.6 | 90.52 | | CaO (%) | 60.2 | 2.0 | | Magnesia (%) | 1.4 | 0.7 | | Fe2O3 | — | 0.80 | | Al2O3 | — | 1.90 |
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