Table 1.
Percent of structural components in clay samples and rice husk ashes (RA) collected from various locations.
| Samples (Number) | Mean/Range/One Value | Percent Structural Components of Clays and RA Samples | Source | ||||
|---|---|---|---|---|---|---|---|
| SiO2 | Al2O3 | Fe2O3 | CaO | K2O | |||
| Clays (11) | Mean | 59.6 | 19.0 | 5.2 | 1.7 | 0.8 | [21] |
| Range | 1.1–69.0 | 0.5–21.7 | 0.2–14.8 | 0.1–6.8 | 0.1–3.3 | ||
| Clays (10) | Mean | 55.3 | 13.7 | 4.4 | 1.4 | 1.3 | [22] |
| Range | 44.3–71.0 | 8.4–20.1 | 1.4–8.0 | 0.1–2.4 | 0.1–2.6 | ||
| Crude bentonite (1) | one value | 80.2 | 13.2 | 2.7 | 0.2 | 0.1 | [23] |
| RA (1) | one value | 88.3 | 0.5 | 0.7 | 0.7 | 2.9 | [24] |
| RA (1) | one value | 89.0 | 1.2 | 1.3 | 1.0 | 1.2 | [25] |
| RA (1) | one value | 93.4 | 0.1 | 0.1 | 0.3 | 1.4 | [26] |
RA: Rice husk ash.