Research Article
Application of Coal Ash to Postmine Land for Prevention of Soil Erosion in Coal Mine in Indonesia: Utilization of Fly Ash and Bottom Ash
Table 1
Physical and chemical properties of the coal ash.
| Samples | FA1 | BA1 | FA2 |
| Physical properties | | | | Specific gravity (g/cm3) | 2.10 | 1.96 | 2.07 | Chemical composition (mass%) | | | | SiO2 | 30.93 | 44.56 | 67.39 | Al2O3 | 13.30 | 16.48 | 18.70 | FeO | 5.93 | 7.60 | 4.16 | MgO | 2.24 | 2.73 | 1.10 | CaO | 1.82 | 2.34 | 2.87 | Na2O | 0.16 | 0.46 | 0.67 | K2O | 1.54 | 1.69 | 1.23 | SO3 | 1.21 | 7.22 | 0.22 | H2O | 41.02 | 22.32 | 1.97 |
|
|