Hot Weather Concreting: Things to Consider

If your construction job is taking place in the summer, you may be concerned about problems in hot weather for concreting. Is it bad to pour concrete in hot weather? In general, the answer is no, but you should be aware of what to expect when you’re pouring concrete in hot weather and know what precautions you may need to take as the temperature rises.

Does Cement Cure Faster in Hot Weather?

Put simply, the answer is yes. The faster cement sets, the faster it begins to cure. At 80 degrees, concrete usually sets in about four hours. At 90 degrees, you can expect it to set in 2.5 hours, and at 100 degrees, your concrete will set in roughly an hour and a half.

What temperature is too hot for pouring concrete? There’s no specific answer, but the hotter it is, the faster you’ll need to work and the more work you’ll have to do to maintain your concrete as it sets and cures. There’s also the question of the effect of the hot weather on your workers to consider.

What Are Some of the Best Ways to Protect Your Concrete in Hot Weather?

Plastic shrinking cracks are a real danger when you’re pouring concrete in hot weather, as surface moisture can evaporate too quickly. There are a number of ways to control your concrete’s temperature for pouring in hot weather conditions. They include:

  • Using a concrete mix that’s designed for hot weather applications
  • Using chilled mixing water for your concrete mixture
  • Dampening the substrate before you place the concrete
  • Applying a retarding admixture
  • Placing your concrete early in the day before the sun reaches its height or in the late afternoon so that temperatures are lower
  • Putting up sunshades around your concrete to keep it cooler
  • Employing more workers if possible so that you can finish working with the concrete faster

 

The Key Elements of Hot Weather Concreting

When it comes to hot weather, preparation is key. When you have a construction job that involves laying concrete, be sure to check the weather well in advance so you know what to expect. However much you normally prepare for a construction job, build in extra prep time if you think you may face high-temperature conditions.

If hot weather is likely, make sure you have clear communication between the contractor, engineers and concrete producer so that you’re aware of exactly what challenges you’re likely to encounter and how you can handle them. If you’re fully prepared, there will be no reason you can’t pour concrete even when conditions are hot, dry or windy.

Need hot weather concreting tips or help finding the right ready-mix concrete for your hot weather job in central PA? Union Quarries is ready to assist. We’re the concrete experts in PA, with thousands of satisfied customers for our concrete products and decades of experience manufacturing and distributing construction materials. Make sure you’re prepared for your next hot weather concreting job by contacting us today!

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