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Concrete Paving Quality Control Procedures: Air Content (Plastic Concrete, Pressure Method) Mobile App

Entrained air is essential to the long-term durability of concrete pavements that are subject to freezing and thawing. Air content is a commonly specified parameter in paving specifications. It is usually measured at the point of placement using a pressure meter (normally a type B meter). Although this test does not provide air system parameters, it is quick, easy to run, and has worked very well for years as a quality control tool. The Concrete Paving Quality Control Procedures: Air Content (Plastic Concrete, Pressure Method) mobile app covers: Purpose, Principle, Test Procedure, Test Method, Output and Construction Issues.

  • Lendlease
  • The Cooperative
  • PG&E
  • Red Bull
  • Mirvac

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Take a peek inside the Concrete Paving Quality Control Procedures: Air Content (Plastic Concrete, Pressure Method) Mobile App

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    Entrained air is essential to the long-term durability of concrete pavements that are subject to ...

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    The fresh concrete is fully consolidated in an airtight container.

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    The test is described in ASTM C 231.

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    Consolidate the concrete in the measuring bowl using a tamping rod or vibrator and mallet.

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    Strike off the concrete in the measuring bowl so that it is level with the top rim.

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    Clean the edge and rim of the measuring bowl and clamp the cover on to form an airtight seal.

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    Pump air into the air chamber until the gauge needle is stabilized on the initial pressure line.

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    Open the valve between the air chamber and the measuring bowl.

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    Tap the measuring bowl with the mallet to ensure that pressure is equalized.

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    Tap the gauge lightly if necessary to stabilize the needle indicator.

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    Record the percentage of air content indicated on the gauge.

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    Air content of the fresh concrete mixture is read directly from the gauge of a calibrated type B ...

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    This is a measure of the percentage of total air content in a concrete mixture.

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    The results are compared to the specifi ed limits and should be plotted on control charts for eas...

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    Air content should be monitored regularly during paving (minimum one test every 500 yd3).

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    Generally, air contents greater than 4.

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    High air contents are less worrisome than low air contents, unless the strength is reduced to cri...

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    Air content can be affected by many factors, ranging from cement and admixture chemistry to mixin...

  • ...and More!

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