The temperature of new concrete should not be allowed to fall below ______ F during the curing period?

The temperature of new concrete should not be allowed to fall below 50°F during the curing period to ensure proper hydration and strength development of the concrete. When concrete is poured, it undergoes a chemical reaction known as hydration, where water and cement interact to form a solid mass. If the temperature drops too low during the curing process, hydration can slow down significantly or even stop. This can lead to incomplete curing, resulting in weaker concrete that may be prone to cracking and other structural issues.

Maintaining the temperature above 50°F helps create an optimal environment for the hydration process to occur effectively. This guideline is particularly vital in climates where temperatures can fluctuate, as colder temperatures could adversely impact the long-term durability of the concrete structure.

It's important to utilize heating methods or insulating blankets if there is a risk of the temperature dropping below this threshold, ensuring that the concrete cures properly and achieves its intended strength and resilience.