North Carolina Building Contractor License Practice Exam

What should the temperature be maintained for curing typical concrete?

1. Above 60 degrees

2. At least 40 degrees

3. At least 80 degrees

4. At least 50 degrees

The correct answer is: At least 50 degrees

The ideal temperature for curing typical concrete is typically maintained at least 50 degrees Fahrenheit. Curing concrete is crucial for its strength and durability, and maintaining an adequate temperature during this process helps ensure proper hydration of the cement. Below 50 degrees, the curing process can be adversely affected, as lower temperatures can slow down the hydration reactions and increase the risk of cracking or weak bonding in the concrete. Curing at temperatures below this threshold can also raise concerns about the strength of the finished product, as it may not reach its full potential in terms of load-bearing capacity. Therefore, ensuring that the curing temperature is above this minimum is essential for achieving the desired performance of the concrete in structural applications. Keeping the curing temperature at a suitable level promotes optimal conditions for the chemical processes that lead to the hardening of the concrete, contributing to overall durability and longevity.