Which of the following is NOT a concrete curing method?

• A. Wet burlap curing
• B. Plastic sheet curing
• C. Steam curing
• D. Water entrapment curing

Answer: (D)

Curing keeps moisture and temperature conditions right so cement can hydrate and develop strength. The methods that actually cure concrete work by maintaining surface moisture or providing a moist, heated environment.

Wet burlap curing keeps the surface continuously damp, which limits evaporation and helps the concrete retain moisture needed for proper hydration. Plastic sheet curing acts as a moisture barrier, reducing water loss from the surface. Steam curing uses warm, humid steam to both maintain moisture and raise temperature, speeding up hydration—common in precast factory settings.

Water entrapment curing isn’t a standard or practical method for curing concrete. Trapping water inside the concrete would create internal pressure and isn’t used to promote controlled curing. So it isn’t considered a curing method.