Finishing Concrete in Cold Weather
Dropping temperatures add a new dynamic to the way we finish concrete. The concrete strengthening process slows down drastically when temperatures drop below 50-degrees. Concrete is a product that gets stronger over time and the colder it gets, the more difficult it becomes for concrete to reach its full strength. Plus, one of the three components of concrete is water. As you can imagine, freezing water can cause some problems when it comes to finishing concrete.
The Challenges of Working with Concrete Mix in Cold Weather
The uses for concrete are widespread and it is has had an incredible impact on the way we live. Getting concrete to a final, usable state requires attention to detail and an eye on the forecast. In the midwest, we often compete with water evaporating in the heat of summer or freezing during the finishing process from fall to spring. Every once and a while we hit the 50-60 degree weather for prime concrete finishing conditions.
Below-freezing temperatures can be a challenge for a concrete mix which is generally 15-20 percent water. When water turns to ice it expands which can lead to cracking and scaling. When the aggregate cannot form a strong bond, the finished product is at risk of being weak and will jeopardize the quality and lifetime of the concrete.
From fall to spring, concrete finishing becomes a task that requires a little more maintenance. There are a few effective methods that allow us to continue to work through the winter.
Care for Concrete After it is Placed
Being aware of the conditions at work against concrete, it is important to have a plan in place to be sure it is poured and finished right the first time. A tear-out and re-pour can be avoided with the right techniques.
Use Concrete Blankets
Concrete blankets are extremely useful during the cold winter months. They help keep the concrete at a suitable temperature which will prevent cracking, scaling, or flaking.
Use Ground Thaw Machines
Ground thaw machines are big heaters and are used to warm the ground before the concrete mix is poured. This piece of equipment is very important in keeping construction projects moving forward in wintertime. You should never pour concrete on snow, ice, or frozen ground. By thawing the ground, you are setting yourself up for success.
The Difference Between Night and Day
It’s important to not forget about the drop in temperature overnight. It may be sunny and 60-degrees during the day, perfect for pouring and finishing concrete. Temperatures can nose-dive when the sun drops below the horizon. It’s not just the 24-hour forecast that matters for finishing concrete, but the 48-hour forecast. Concrete should ideally be maintained at a temperature between 50-60 degrees for two full days.
Work With Jordison Construction This Winter
We are ready to go to work for you, no matter the conditions. We have over 40 years of experience in concrete finishing in central Iowa. Our commercial concrete services include parking structures, building foundations, super flat floors, and more. Contact Jordison Construction today to get started with your project.