What is a normal curing temperature?

• A. 65°F
• B. 75°F
• C. 85°F
• D. 95°F

Answer: (B)

During curing, keeping the concrete at a steady, moderate temperature helps the hydration reaction proceed at a balanced rate so strength develops properly and moisture isn’t lost too quickly. About 75°F is the typical target for normal curing because it sits in that ideal middle ground: it’s warm enough to avoid very slow curing but not so hot that hydration speeds up too fast or moisture evaporates quickly, which can cause cracking or shrinkage.

If the temperature is cooler, like 65°F, curing slows down, delaying strength gain. If it’s warmer, such as 85°F or 95°F, hydration speeds up and moisture can evaporate faster, increasing the risk of cracking or moisture-related problems if improper curing methods aren’t used. So, 75°F is the best answer for a normal curing temperature.