Characteristics of quicklime and hydrated lime
Characteristics of quicklime and hydrated lime
Link to this table
| Parameter | Quicklime | Hydrated lime |
|---|---|---|
| Formula | CaO | Ca(OH)2 |
| Molecular weight | 56.1 | 74.1 |
| Physical state | White solid | White solid |
| Particulate size | Pulverized to lump | Powder, 200 to 400 mesh |
| Bulk density (lb/ft3) | 55 to 75 | 35 to 50 |
| Specific gravity (g/cm3) | 3.2 to 3.4 | 2.3 to 2.4 |
| Affinity for water | Reacts quickly to for Ca(OH)2 with heat of formation, 490 Btu/lb | Absorbs H2O and CO2 from air to form CaCO3 |
| Solubility | Slightly, varies inversely with temperature | Slightly, varies inversely with temperature |
| Stability in bagged storage | In multiwalled bags, max 60 days | Up to 6 months, in dry tight bags |
| pH of saturated solution | 12.4 | 12.4 |