What do concrete air meters measure?

Concrete air meters are specifically designed to measure the air content in fresh concrete. This measurement is crucial because the amount of air entrained in the concrete mix affects its durability, workability, and resistance to freeze-thaw cycles. Air content is important for ensuring that concrete can withstand environmental conditions without suffering damage.

Air meters typically employ methods such as the pressure method or the volumetric method to determine air content. These methods help evaluate the entrained air in the concrete mix, which is essential for performance, especially in regions subjected to extreme weather conditions. Proper control of air content can enhance the longevity and performance of the concrete structure.

Other methods and tools are used for the other choices listed, such as thermometers for temperature measurements and moisture meters for assessing moisture levels in aggregates, which means those options do not accurately represent the function of concrete air meters.