What is the correct procedure for protecting fresh concrete from environmental damage?

• A. Move forms and remove wind barriers immediately.
• B. Keep moisture, shade, use curing blankets or membranes, and shield from wind and sun as per spec.
• C. Allow direct sun to dry out rapidly.
• D. Remove curing after 2 hours.

Answer: (B)

Fresh concrete needs ongoing moisture and a stable environment during curing to hydrate properly and gain strength. If water evaporates too quickly or the surface gets too hot, you can get plastic shrinkage cracks and a weaker final product. The best procedure is to keep moisture, provide shade, use curing blankets or membranes, and shield from wind and sun as per spec. This combination slows evaporation, maintains appropriate humidity and temperature, and supports proper hydration and surface quality. Exposing the fresh concrete to wind, direct sun, or removing curing too early disrupts curing, increases moisture loss, and reduces strength.