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  1. Owlcation
    https://owlcation.com › academia

    ASTM C231: Testing Air Content of …

    • Learn how to use a type B pressure meter to measure the air content of concrete samples according to ASTM C231. Find out the significance, equipment, and procedure of this test for concrete quality control.… 展开

    Significance and Use of ASTM C231

    This test’s purpose is to get the air content of a sample of concrete using a pressure meter. In the meter, you have a known volume of air at a known pressure in a sealed air pot with an unknown volume of air being contain… 展开

    Air Content Test Equipment

    A clean, working pressure meter –Complete with gauge and bowl (see calibration for more specifics).
    A tamping rod– The 18-inch, 5/8 diameter rod (the big one used with 6x12 cylinders, not the small on… 展开

    ASTM C231 Procedure

    Wipe down the inside and rim of the measuring bowl and cover it with a wet rag to ensure that the pressure meter seals correctly when it is closed. Make sure you are doing the test on a level surfa...
    Take your sampl… 展开

    Aggregate Correction Factor

    For every air test you do, you will need to account for the amount of air that is stored in the voids of the aggregate. Some concrete suppliers may give out the aggregate correction factor for each mix design they offer… 展开

    Can entrained air be used to test lightweight concrete?
    This test method cannot be used for testing lightweight concrete because the aggregate in lightweight is too porous. See ASTM C173 Air Content by Volumetric Method. Remember, entrained air is necessary for concrete that will be directly exposed to freeze-thaw cycles throughout its lifetime.
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  1. Total air content in fresh concrete is determined by one of three standard tests: the unit weight test, the roll-o-meter test, and the pressure meter test.
    了解详细信息：
    Total air content in fresh concrete is determined by one of three standard tests: the unit weight test, the roll-o-meter test, and the pressure meter test.

    Measuring Air in Fresh and Hardened Co…

    www.concreteconstruction.net/how-to/materials/me…
    An air content test is required for checking air entrained concrete. The method of testing is given in BS EN 12350-7, which replaces BS 1881: Part 106. Method A outlines the principle of the test.

    Air Content Test - Concrete

    www.concrete.org.uk/fingertips-nuggets.asp?cmd=…
    Measurement of Air Content in Concrete Air content of concrete is measured by the pressure air measurement method which is based on the principles of The Boyle's law.

    Measurement of Air Content in Concrete …

    theconstructor.org/concrete/air-content-concrete-m…
  2. Concrete Network
    https://www.concretenetwork.com › ... › air-content.html

    Air Content in Concrete - Concrete Air Test - Concrete …

    Information and tips for testing the air content in fresh concrete. Learn how air meters use pressure to perform a concrete air test.

  3. Owlcation
    https://owlcation.com › humanities

    ASTM C173: Air Content of Freshly Mixed …

    2023年10月8日 · ASTM C173 is a test method that covers the determination of the air content of a sample of freshly mixed concrete. It can be used for any type of aggregate, but since it …

  4. SI Certs
    https://www.sicerts.com › aci › air-content-pressure-method-test

    ASTM C231 - Concrete Air Content Test, Pressure Method

  5. Gilson Co.
    https://www.globalgilson.com › blog › air-content-test

    Concrete Air Testing: An In-Depth Look - Gilson Co.

    Learn how to test air content in concrete for durability, workability, and quality control. Compare different types of air meters and volumetric methods, and find out when and where to perform air testing.

  7. certifiedmtp.com
    https://blog.certifiedmtp.com › how-to-perfor…

    How to Perform a Concrete Air Test

    2024年6月13日 · Understand volumetric & gravimetric methods for testing air content in concrete mixes. Identify factors that affect results & troubleshoot common issues. Use essential …

  8. nazhco.com
    https://nazhco.com › wp-content › uploads
    [PDF]

    Standard Test Method for Air Content of Freshly Mixed …

  9. certifiedmtp.com
    https://blog.certifiedmtp.com › concrete-air...

    Concrete Air Indicator: Tips for Accurate Air …

    2024年8月26日 · A Concrete Air Meter measures the air content of fresh concrete to ensure that it meets ASTM and AASHTO standards test methods. It is commonly used for testing …

  10. Concrete Bridge Views
    https://concretebridgeviews.com › ...

    Measurement of Air Content in Concrete

    2010年5月1日 · AASHTO T 121, Standard Method of Test for Density (Unit Weight), Yield, and Air Content [Gravimetric] of Concrete determines air content of fresh concrete by comparing measured density or batch volume to …

  11. Concrete Construction
    https://www.concreteconstruction.net › _view-object
    [PDF]

    Part 3 of a 4-part series M e a s u r i n g air ... - Concrete …

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