Concrete curing, the process where it hardens and gains strength, is significantly affected by temperature. Cold weather, typically defined as temperatures below 5C (40F), slows hydration, the chemical reaction between cement and water that causes concrete to harden. This extended hydration period increases the time required for the concrete to achieve its designed strength.
Understanding the impact of low temperatures on concrete is critical for ensuring structural integrity and long-term durability. Improper curing in cold conditions can lead to reduced strength, surface scaling, and cracking. Historically, cold-weather concreting presented significant challenges, but modern techniques and materials have mitigated many of these risks, enabling year-round construction. Proper curing practices become even more crucial in colder climates and seasons.