Air entrainment meters are essential tools used in cement testing to measure the amount of air trapped within mortar samples. Testing equipment, such as air entrainment meters are used to testing small air bubbles in mortar or concrete and cement paste to enhance its durability and workability. The air entrainment meter that tests air voids provide accurate and reliable measurements, allowing for quality control and assurance in construction projects. They also meet the requirements of ASTM c231 used for fresh mixed concrete and freshly mixed mortar.
Air entrainment meters typically consist of a cylindrical container, a pressure gauge, and a pressure chamber and pressure pump. The process begins by filling the container with a known volume of mortar sample. The pressure pump is then used to apply pressure to the sample, causing the air bubbles to be released and rise to the surface. The pressure gauge measures the pressure required to release the air bubbles, which is a direct indication of the amount of air entrained in the mortar.
The results obtained from air entrainment meters are expressed as the percentage of air content in the mortar. This measurement is crucial as it affects the workability, freeze-thaw resistance, and overall durability of the concrete or mortar. Different construction applications require specific air content ranges, and these meters help ensure that the mortar meets the desired specifications.
Air entrainment meters are constructed from cast aluminum and have a overflow valve with hand pump. to provide accurate and repeatable results. They are supplied complete and correspond with the Type B Concrete Air Meters, and are calibrated regularly to maintain their precision. Furthermore, they are portable and easy to use, making them suitable for both laboratory and field applications.
In summary, air entrainment meters for entrained air and air bubbles in concrete mixtures are valuable tools in cement testing, allowing engineers and technicians to measure and control the air content in mortar accurately. By ensuring the desired air entrainment levels, these meters contribute to the durability, workability, and performance of concrete in various construction projects.
