Table 1 Major chemical composition of raw bentonite and PG in wt%. L.O.I: Loss On Ignition. LOD: Limit of detection
From: Phosphogypsum waste as additives to lime stabilization of bentonite
Major oxides | PG (%) | Raw bentonite (%) |
|---|---|---|
SiO2 | 0.50 | 51.01 |
Al2O3 | 0.11 | 24.36 |
Fe2O3 | 0.08 | 2.78 |
CaO | 31.51 | 1.13 |
MgO | 1.59 | 1.14 |
SO3 | 46.9 | 0.80 |
K2O | 0.03 | 0.66 |
TiO2 | < LOD | 0.17 |
Na2O | 0.03 | 1.58 |
P2O5 | 0.35 | 0.05 |
L.O.I at 1000 °C | 16 | 20 |