What are the recommendations for use of calcium chloride to freeze-proof water-filled containers?
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Technical grades of solid and liquid calcium chloride may be used to
freeze-proof water-filled containers, such as traffic barriers. The
target concentration depends primarily on the level of freeze protection
desired. See below for the freeze points of typical concentrations.
|
| Wt % |
Sp. Gr. |
lbs/gal |
Freeze Pt |
| 16% |
1.149 |
9.55 |
+ 8 °F |
| 20% |
1.189 |
9.88 |
- 4 °F |
| 24% |
1.228 |
10.20 |
- 20 °F |
| 28% |
1.275 |
10.60 |
-46 °F |
| 32% |
1.322 |
10.99 |
-17 °F |
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Refer to General Questions for guidance on making
calcium chloride solutions from solid calcium chloride products.
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