1. Use only when ambient temperature is 20 ̊ F and rising.
2. Concrete should be a 6.5 bag 4,500 PSI mix design as a minimum.
3. Concrete should be air entrained.
4. Concrete should be blanketed for continued strength gain after initial set.
5. Concrete should not be placed on frost or frozen subgrade.
6. Concrete should not have water or precipitation on the surface during placing or finishing.
7. Refer to ACI 306 for complete guide to cold weather concrete practices.