How to Pour Concrete in Hot Weather

How to Pour Concrete in Hot WeatherMidwest summers can be excruciating, but hot weather can be found all over the US. While the warm weather may be optimal for swimming and spending time outside, it can affect the way you pour concrete. Before you let the hot weather wreak havoc on your concrete project, be sure you fully understand how to pour concrete in hot weather.

Plan pours during cooler parts of the day.
The temperature of concrete plays an important role in its quality and overall aesthetics. In order to avoid any hot-weather-related issues, try to schedule your concrete work during the cooler parts of the day, such as early morning or later at night. Although you may need to adjust your project schedule, doing this can actually keep your project running on time because you avoid any temperature-related issues.

Discharge trucks quickly.
The higher temperatures result in quicker set times, so if you’re not prepared, you could end up with unusable concrete or a bad pour. When the weather is hot, make sure that you discharge the trucks quickly. Be sure that you have plenty of people on hand to unload the concrete and handle the job in a timely manner. Remember that the hotter it is, the less time you have to place the concrete. It may cost you more in labor, but it’s worth not having to pay for new concrete.

Use shade.
If you can block the sun from the concrete, you can decrease the temperature and make it easier for you to unload. Consider erecting temporary sunshades in the area where you’re working with concrete. This will keep the sun away from the concrete, which can cool its surface temperature.

Use retarders.
Higher temperatures can cause water to quickly evaporate from the surface of the concrete. This results in a quicker set time. To combat this, some people add more water to the mix, but this lowers the water/cement ratio, which adversely affects the strength of the concrete.

Instead of adding water, use retarders or hydration stabilizers to maintain the moisture level in the concrete mix. This will keep water from evaporating without altering the water/cement ratio.

Use ice or chillers.
Keeping your concrete at a cooler temperature can also be done by using ice or chillers. These will typically cost more, but it can help you place concrete in hot weather without any issue.

Knowing how to pour concrete in hot weather can keep your project running on time. Contact us today to schedule concrete for your next pour.

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