Experts agree that the best temperature to pour concrete is between 50-60 °f. The necessary chemical reactions that set and strengthen concrete slow significantly below 50 °f and are almost non-existent below 40 °f.
How Cold Is Too Cold to Pour Concrete?
Concrete is one of the most versatile construction materials available and is used in building foundations, driveways, patios, and more. But, when it comes to pouring concrete in cold weather, there is a risk for problems. Knowing how cold is too cold to pour concrete is important for ensuring the stability of your project.
When it comes to pouring concrete in cold weather, the general rule of thumb is that temperatures should not drop below 40 degrees Fahrenheit. Concrete will begin to freeze at temperatures below 40 degrees. If it freezes, it will not cure properly and the finished product will be weak and susceptible to cracking.
If temperatures are expected to remain below 40 degrees, there are a number of measures that can be taken to ensure that concrete cures properly. The first step is to use an air-entraining agent in the concrete mix. This will help to reduce the risk of freeze-thaw damage by trapping tiny air bubbles in the mix.
Another option is to look for a fast-curing concrete mix. This type of mix will cure more quickly, making it less likely that it will freeze before it has a chance to cure properly. It is important to note, however, that fast-curing concrete mixes are more expensive