Concrete curing: The process of hardening concrete by maintaining adequate moisture at the surface after placement is called

Introduction / Context:
Curing ensures the hydration of cement proceeds sufficiently to develop desired strength and durability. It is distinct from placing and compaction, and it continues well after initial set.

Given Data / Assumptions:

• Concrete has been placed and compacted.
• Environmental exposure may cause evaporation.
• Objective is to keep moisture and temperature favorable for hydration.

Concept / Approach:
“Curing” comprises methods such as water ponding, wet coverings, curing compounds, and membrane sealing to prevent moisture loss and control temperature. Adequate curing reduces plastic shrinkage, improves surface wear resistance, and increases long-term strength.

Step-by-Step Solution:
Identify the aim: maintain moisture for hydration after set.Associate with the correct term → curing.Differentiate from placing (initial deposit), wetting (informal), and compacting (air removal).

Verification / Alternative check:
Strength gain curves show clear improvements with longer, proper curing relative to air-dried controls.

Why Other Options Are Wrong:
Placing/Compacting are separate construction stages; “wetting” is not the technical term.

Common Pitfalls:
Stopping curing too early; curing only visible surfaces while edges/corners dry out.

Final Answer:
Curing.