Modern Contractor Solutions: Cold weather concreting

Published on Modern Contractor Solutions in December 2019.

When placing concrete in cold weather, extra precautions must be taken to ensure that the concrete sets properly and gains adequate strength. The first few days after placement are the most important because that is when the cement hydration reaction proceeds the fastest and the concrete gains most of its overall strength. However, cold temperatures slow the hydration process, meaning that concrete placed in low temperatures gains less strength than the same mix in warmer temperatures during the same length of time. If the water in the concrete mix freezes, the hydration process stops completely. Even if it thaws, strength gain may not recover.

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