Research Article
Evaluation of the Performance and Microstructure of Ecofriendly Construction Bricks Made with Fly Ash and Residual Rice Husk Ash
Table 1
Physical and chemical analyses of RHA and FA.
| | Items | RHA | Class-F fly ash | | FA | ASTM C618 |
| | Physical properties | | | | | Specific gravity | 2.18 | 2.08 | — | | Mean particle size (μm) | 15.1 | 21.8 | — | | Blaine fineness (m2/kg) | 705 | 665 | — | | Loss on ignition (%) | 2.67 | 2.01 | — | | Color | Black | — | — | | Chemical composition (%) | | | | | SiO2 (S) | 95.6 | 63.9 | — | | Al2O3 (A) | — | 20.0 | — | | Fe2O3 (F) | 0.24 | 6.64 | — | | S + A + F | 95.84 | 90.54 | Min: 70% | | CaO | 0.7 | 3.84 | — | | MgO | — | 1.25 | Max: 5% | | SO3 | 0.15 | 1.32 | — | | P2O5 | 0.52 | 0.46 | — | | TiO2 | 0.02 | 1.22 | — | | Na2O | — | — | — | | K2O | 2.66 | 1.08 | — |
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