Table 1.
Statistical parameters describing the particle size distribution and specific surface area (SSA) of fillers; Q1, Q2, quartz powders; FAS, siliceous fly ash; FAF, FAF2, fluidized fly ashes.
| Raw Material | Quartz Sand | Quartz Sand | Coal | Coal | Lignite |
|---|---|---|---|---|---|
| Production | Grinding | Grinding | Conventional Combustion | FBC Combustion | FBC Combustion |
| Parameter | Filler Q1 [20] | Filler Q2 | Filler FAS [20] | Filler FAF [20] | Filler FAF2 |
| D min, µm | 0.26 | 1.32 | 0.17 | 0.12 | 0.17 |
| Mode, µm | 0.28 | 2.45 | 4.96 | 0.25 | 0.25 |
| Median, µm | 2.44 | 7.18 | 25.30 | 0.27 | 0.26 |
| D max, µm | 67.52 | 58.95 | 200.00 | 77.34 | 101.46 |
| SSA 1, m2/m3 | 8 701 | 5 857 | 18 294 | 14 825 | 12 215 |
| Density, kg/m3 | 2650 | 2650 | 2110 | 2440 | 2550 |
1 SSA was calculated from the particle size distribution, making an assumption about the spherical shape.