Concrete can start to set and dry quickly once it is poured, but it needs to fully cure before you can safely walk on it or drive heavy vehicles over it. A good rule of thumb is to allow 24 hours for light foot traffic and seven days for concrete to reach 70% of its specified compressive strength, or 2,500 psi.

During curing, hydration takes place, and rock-like crystals develop within the mixture to give it strength. But the temperature and moisture conditions must stay in an ideal range to keep this process happening properly. Concrete that is exposed to cold temperatures slows down or even stops the hydration process.

The concrete is still cured, but not as efficiently. A good solution is to insulate the concrete and protect it from cold temperatures until it has reached a full set. This can be done in a variety of ways, including using concrete blankets or sheets, spraying or fogging the surface, or immersing the concrete in ponds or tanks of water.

These techniques can be very effective in lowering the time it takes for concrete to reach its full strength. However, these solutions aren’t suitable for all types of concrete or applications, and it is important to consider the quality of the finished product before choosing an acceleration method.