Concrete Air Meters and Indicators

Air Meters and Indicators Air Meters and Indicators

Air Meters and Indicators

Controlling the air content thorough air entertainment is essential in many types of concrete. With an air-entraining admixture, small air bubbles are deliberately created within a concrete mixture. These bubbles protect concrete exposed to freezing and thawing from damages caused by freezing water. more »

Air Meters and Indicators, continued

They relieve pressure and while extending the mix’s lifetime.

Much testing is required to assure the concrete is mixed correctly. Evaluations carried out on fresh concrete during placement is often not representative of the concrete’s actual properties. Because of this, air meters and indicators are used to determine the air content of fresh concrete. More specially, they guarantee that concrete will be durable under freeze/thaw conditions.

There are two main types of air meters:

Pressure meters provide quick, reliable results. Using an upper chamber of air and a lower chamber of concrete, air is pressurized and released into the lower chamber. The bubbles formed by the concrete compressing under increased pressure are measured and used to determine the air content of the concrete.

Volumetric meters take significantly more time and effort. Through this method a microscope is used to count and measure the size of the air bubbles. This can determine the average bubble size and specific surface. These are ultimately used to determine the air content of a concrete mix.

Because there are multiple ways to test air content of fresh concrete, you have to be careful not to only go by the initial results. Assessment outcomes can vary especially based on conditions. Specifically on large quantities of concrete, it can be important to do further investigation with both field and lab tests.

Humboldt provides a wide selection of Air Meters and Indicators to choose from. If you have questions or need help selecting equipment, please call us at 1.800.544.7220 or use our Ask Humboldt form.

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