If the temperature of freshly mixed concrete increases by 10 degrees Fahrenheit, what is an expected outcome?

When the temperature of freshly mixed concrete increases, it can result in a reduction of the workability of the concrete, primarily affecting the slump. To maintain the desired slump, which is a measure of the workability or fluidity of the concrete mix, more water may be needed. Higher temperatures can lead to faster hydration of cement particles which can, in turn, create a stiffer mix. Therefore, the addition of more water is often necessary to keep the mix workable and to retain the desired consistency for proper placement and finishing of the concrete.

This is crucial for ensuring that the concrete can be easily placed and shaped without encountering issues related to insufficient workability. Maintaining the correct slump is essential for achieving the desired performance characteristics in the finished concrete, affecting factors like strength, durability, and overall finish quality.