The Concrete Air Entrainment Meter (Air Content Test Apparatus) is an essential testing instrument used in civil engineering and construction to determine the amount of entrained air present in freshly mixed concrete. Measuring air content is critical because excessive or insufficient air can affect the strength, durability, and workability of concrete structures.
This testing apparatus typically consists of an aluminum cylindrical container, airtight cover assembly, pressure gauge, valves, and a hand-operated air pump. During the test procedure, a sample of fresh concrete is placed inside the container and sealed. Air pressure is then applied, and the change in pressure is used to calculate the percentage of air contained in the concrete mixture.
The pressure method, standardized under ASTM C231, is widely used in field and laboratory testing because it is fast, reliable, and suitable for normal-weight concrete mixtures. The apparatus allows technicians and engineers to quickly evaluate whether the concrete mix meets required specifications before placement.
Manufactured from durable materials such as cast aluminum or stainless steel, the Concrete Air Entrainment Meter is designed for long-term use in demanding construction environments. Its compact and portable design makes it suitable for both on-site testing and laboratory quality control. The equipment is commonly used by civil engineers, quality control inspectors, research laboratories, and construction companies to ensure consistent concrete performance and compliance with international standards.
By providing accurate measurements of air content, the Concrete Air Entrainment Meter helps improve the freeze–thaw resistance, durability, and overall quality of concrete structures, making it an essential tool in modern concrete testing practices.
 (2).png)