What is a common sign of concrete that has not been cured properly?

Surface cracking and scaling are common signs of concrete that has not been cured properly. Curing is essential for concrete as it helps to maintain moisture and allows for proper hydration of the cement particles. When concrete is not cured adequately, it can lead to a premature loss of moisture, causing the surface to crack and scale as the concrete shrinks and hardens. This affects the durability and strength of the concrete as well as its appearance.

In contrast, increased color richness could actually indicate better curing and hydration as moisture plays a role in the curing process. A smooth finish is typically a result of proper finishing techniques, not directly related to curing. Reduced drying time does not correlate with improper curing; typically, lack of adequate moisture retention leads to longer drying times. Thus, surface cracking and scaling effectively highlight the importance of proper curing practices in concrete maintenance.