Difference between revisions of "Characteristics of quicklime and hydrated lime"
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<td>Formula</td> | <td>Formula</td> | ||
<td>CaO</td> | <td>CaO</td> | ||
| − | <td>Ca(OH)2</td> | + | <td>Ca(OH)<sub>2</sub></td> |
</tr> | </tr> | ||
<tr> | <tr> | ||
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</tr> | </tr> | ||
<tr> | <tr> | ||
| − | <td>Bulk density (lb | + | <td>Bulk density (lb/ft<sup>3</sup>)</td> |
<td>55 to 75</td> | <td>55 to 75</td> | ||
<td>35 to 50</td> | <td>35 to 50</td> | ||
</tr> | </tr> | ||
<tr> | <tr> | ||
| − | <td>Specific gravity</td> | + | <td>Specific gravity (g/cm<sup>3</sup>)</td> |
<td>3.2 to 3.4</td> | <td>3.2 to 3.4</td> | ||
<td>2.3 to 2.4</td> | <td>2.3 to 2.4</td> | ||
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<tr> | <tr> | ||
<td>Affinity for water</td> | <td>Affinity for water</td> | ||
| − | <td>Reacts quickly to for Ca(OH)2 with heat of formation, 490 Btu/lb</td> | + | <td>Reacts quickly to for Ca(OH)<sub>2</sub> with heat of formation, 490 Btu/lb</td> |
| − | <td>Absorbs H2O and CO2 from air to form | + | <td>Absorbs H2O and CO2 from air to form CaCO<sub>3</sub></td> |
</tr> | </tr> | ||
<tr> | <tr> | ||
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<td>pH of saturated solution</td> | <td>pH of saturated solution</td> | ||
<td>12.4</td> | <td>12.4</td> | ||
| − | <td>12 | + | <td>12.4</12.4</td> |
</tr> | </tr> | ||
</table> | </table> | ||
Revision as of 21:29, 29 December 2020
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 | Power, 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</12.4 |