Pouring concrete in hot weather
Laying your own concrete mix can be a challenge at the best of times, but did you know that pouring concrete in hot weather can have just as much impact as cold conditions?
How is concrete pouring affected by heat?
Higher air temperatures mean that concrete will cure more quickly. The difficulty with this is that the concrete mix itself needs to hydrate as part of the curing process, whereby crystals form within the mixture as the concrete absorbs water.
However, if the surrounding temperature is too hot and this process is sped up, these crystals form too quickly and makes them unable to strengthen as they should. This can lead to hardened concrete which is weaker than required, causing issues and delays to your project.
Cracking is also another issue that can occur as a result of hot weather conditions, as water can evaporate from the surface of fresh concrete too quickly, leading to weak top layers.
How can I avoid these heat-related issues?
There are a number of simple and cost-effective ways to prevent your concrete from the effects of warm weather, including:
– Opting for ready mix concrete enables you to avoid the curing process and pour directly from the mixing truck
– Using a concrete pump means that the mix is poured directly into the desired areas and spends less time being exposed to the warm air
– Try to avoid laying concrete at the hottest part of the day, which is usually between 11am & 3pm
– Using a concrete mix with a slower curing time can combat the curing problems caused by excessive heat
– Keep all equipment used to help lay the concrete cool and store in a shaded area where possible (particularly metal tools)
– Ensure that you have enough support to lay the concrete in a timely manner
– Make sure that you are fully prepared to be able to receive any concrete delivery to avoid waiting times
– Create shade over setting concrete using plastic sheeting or other materials
If you haven’t had previous experience in laying concrete, we’d always advise getting in contact with a professional, to avoid any unnecessary issues & delays. Our team are always on hand to help with any queries you have about your projects.
How does warm weather affect cured concrete?
Once your concrete is fully cured, it is able to tolerate temperatures of up to 400 degrees without any structural problems, making in the ideal choice for construction and surface works around the world. Poured correctly, this strong and highly durable material can maintain its integrity for decades, depending on its application.
If you’re interested in finding our more about laying concrete in increasingly warm conditions, or simply want to discuss your next project, contact our experienced team today.