What is a common issue related to finishing concrete too early?

Finishing concrete too early can lead to surface cracking, which is a common issue in concrete work. When the finishing process is done before the concrete has adequately set and cured, it can disrupt the formation of a strong surface layer. The surface of the concrete can dry too quickly while the interior remains plastic and workable, causing stress imbalances. As the lower layers continue to shrink or settle, cracks can form at the surface due to this uneven drying and curing process.

In contrast, increased viscosity pertains more to the workability of the concrete mix rather than the timing of the finishing. Poor color consistency is often associated with issues in the mixing process or the quality of the materials used, rather than the timing of the finishing. Weak compressive strength is generally a result of factors such as inadequate curing, poor mix design, or improper material selection, rather than the timing of the finishing. Thus, the correct identification of surface cracking highlights the importance of proper timing in the finishing process to preserve the integrity of the concrete surface.