• Air-entrained concrete: This type of mix includes tiny air bubbles, which give the concrete room to expand when water freezes. It’ s a must-have for areas prone to freeze-thaw cycles.
• Hot water in the mix: Using heated water can help keep the concrete temperature high enough to kick-start hydration, even in cold weather.
Both you and your supplier should be aware of all of these elements, but ultimately it’ s on you to know what is needed and communicate it prior to delivery.
Monitoring and Adjusting Temperature
Once your concrete is poured, the job isn’ t over. In fact, it’ s just beginning. Keeping an eye on the concrete’ s temperature is still important to ensure it cures properly. Here’ s how to stay on top of it:
Frost-Proof Placement
Must-Know Tips for Cold Weather While mixing and curing get a lot of attention, the actual placement process is just as important in cold weather. Here are a few quick tips:
• Work quickly as time is not your friend when it’ s cold out. Place and finish the concrete as efficiently as possible to avoid heat loss.
• Avoid overworking because over-finishing the surface can trap water, increasing the risk of freezing damage. Keep it smooth, but don’ t go overboard.
• Use curing compounds or plastic sheeting to retain moisture and prevent freezing during those crucial early hours.
• Use insulated blankets or tarps: These are lifesavers for trapping heat and protecting the concrete from freezing temperatures. Cover it as soon as possible after placement.
• Set up heating systems: Depending on your project size, you might need portable heaters or heated enclosures to maintain a stable environment.
• Monitor internal temperatures: Use a concrete thermometer or sensors to track the internal temperature. Ideally, it should stay above 50 degrees Fahrenheit or 10 degrees Celsius for at least the first few days.
• Extend curing time: Concrete cures more slowly in cold weather, so don’ t rush to remove forms or load the structure prematurely. Giving it extra time can prevent issues down the line.
Final Thoughts on Cold Weather Pours
Pouring concrete in cold weather is a challenge, but with the right preparation, mix adjustments and temperature monitoring, you can achieve high-quality results even when it’ s frosty outside. It’ s all about paying attention to the details, from warming the ground to choosing the right additives for your mix.
You’ ll spend more time prepping the site and monitoring curing temperatures, but the payoff is concrete which stands the test of time. So, bundle up, take your time and don’ t skimp on those insulated blankets. Winter pouring might never be your favorite part of the job, but it doesn’ t have to be a nightmare.
www. contractorshotline. com January 10, 2025 11