Which curing method utilizes electric heat for accelerated curing of concrete?

The method that utilizes electric heat for accelerated curing of concrete is identified as electric heaters. Electric heaters directly provide heat to the concrete, allowing for faster curing by maintaining the necessary temperatures in cold weather conditions. This approach helps to minimize the risks associated with low-temperature curing, such as cracking or incomplete hydration.

Electric heaters can be used effectively to create a warm environment around the concrete, ensuring that hydration continues at an optimal rate. By supplying consistent heat, they help achieve the desired strength and durability of the concrete in a reduced time frame.

The other options, while they can contribute to concrete curing, do not specifically involve electric heat. Radiant heating refers to a method where heat is transferred from a hot surface to the concrete but does not necessarily involve electricity. Space heaters can provide heat, but they may use various fuel sources like gas, and are not restricted to electric power. Live steam is another method that adds moisture and heat but does so through the injection of steam into the curing area, which differs from the direct use of electric heaters. Therefore, the focus on electric heaters as a dedicated method for accelerated curing makes it the correct choice in this context.