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Concrete Manual Tests: Air Content Tests Mobile App

Accurate determination of the air content is essential in computations of cement content and yields, as well as a check for compliance with Specification 2461.4A4b limitations on the air content itself. The air test is subject to the variations and limitations of each batch; therefore, spread the tests out over the entire period of the placement operation. The Concrete Manual Tests: Air Content Tests walks you through conducting an air test.

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

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Take a peek inside the Concrete Manual Tests: Air Content Tests Mobile App

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    The general statements made in an earlier section with reference to consistency apply as well to ...

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    Accurate determination of the air content is essential in computations of cement content and yiel...

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    For all air-entrained concrete the Specification limits for air content is in the range of 5 to 8%.

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    Perform enough tests during the pour to accurately determine the average air content of the concr...

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    The air test is subject to the variations and limitations of each batch; therefore, spread the te...

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    It is the duty of the Inspector to inform the Contractor of the air content test results.

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    In making the test, it is very important to use concrete of representative composition in filling...

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    It is important to complete the test without interruption and as quickly as possible once it is s...

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    A.

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    Obtain a representative sample.

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    Dampen bowl.

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    Rod each layer 25 times with a 16 mm (5/8 in.

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    Rod bottom layer throughout its depth without forcibly striking bottom of container.

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    Rod the middle and top layer throughout their depths and penetrating 25 mm (1 in.

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    Tap the sides of the container smartly 10 to 15 times with the mallet after rodding each layer.

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    Strike off concrete level with top of container using the bar and clean off rim.

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    Clean and moisten inside of cover before clamping to base.

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    9. Open both petcocks

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    Close air valve between air chamber and the bowl.

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    Inject water through petcock until it flows out the other petcock.

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    Continue injecting water into the petcock while jarring and tapping the meter to insure all air ...

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    Close air bleeder valve and pump air up to initial pressure line.

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    Allow a few seconds for the compressed air to stabilize.

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    15. Adjust the gage to the initial pressure

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    Close both petcocks.

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    Open air valve between chamber and bowl.

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    Read the air percentage after lightly tapping the gage to stabilize the dial.

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    Close the air valve and then open petcocks to release pressure before removing the cover.

  • ...and More!

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