What practice is recommended for cold weather concreting to avoid early-age cracking?

• A. Use heated enclosures or blankets, heated water, and appropriate curing strategies.
• B. Pour only during summer and ignore curing.
• C. Use very low cement content to reduce heat.
• D. Do not cure at all.

Answer: (A)

Cold weather concreting requires keeping the concrete warm and properly cured to prevent cracking as it gains strength. When temperatures drop, hydration slows and thermal gradients can cause early-age shrinkage and cracking. Using heated enclosures or blankets, heated water, and a well-planned curing regimen helps maintain a safe, steady temperature and moisture level, promoting continuous hydration and reducing stresses that lead to cracks.

Treating the concrete this way is far more effective than trying to avoid curing or changing cement content to manage heat. Pouring only in summer and ignoring curing leaves the concrete exposed to freezing and drying out, which increases cracking risk. Using very low cement content reduces strength and durability without reliably preventing cracks. Not curing at all guarantees excessive shrinkage and cracking.