How does humidity impact the concrete finishing process?

Humidity plays a significant role in the concrete finishing process, particularly in how it affects evaporation rates. When humidity levels are high, the moisture in the air reduces the evaporation rate of water from the surface of freshly placed concrete. This can be advantageous during the finishing process, as it allows for more time to work with the concrete without it drying too quickly. Conversely, low humidity increases the rate of evaporation, which can lead to issues such as cracking and a weakened surface if the concrete dries too quickly before finishing operations can be completed.

Understanding this aspect of humidity is critical for achieving a successful finish. A finishing crew must monitor environmental conditions to ensure that the concrete maintains an appropriate moisture content during the curing and finishing stages. Therefore, high and low humidity conditions have tangible effects on the behavior of concrete, making the stated answer accurate in highlighting these contrasting influences.