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About This Item

 

Full Description

1.1 This test method covers determination of the air content of freshly mixed concrete from observation of the change in volume of concrete with a change in pressure.

1.2 This test method is intended for use with concretes and mortars made with relatively dense aggregates for which the aggregate correction factor can be satisfactorily determined by the technique described in Section 6. It is not applicable to concretes made with lightweight aggregates, air-cooled blast-furnace slag, or aggregates of high porosity. In these cases, Test Method C173/C173M should be used. This test method is also not applicable to nonplastic concrete such as is commonly used in the manufacture of pipe and concrete masonry units.

1.3 The text of this test method references notes and footnotes that provide explanatory information. These notes and footnotes (excluding those in tables and figures) shall not be considered as requirements of this standard.

1.4 The values stated in either SI units or inch-pound units are to be regarded separately as standard. The values stated in each system may not be exact equivalents; therefore, each system shall be used independently of the other. Combining values from the two systems may result in non-conformance with the standard.

1.5 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use. (Warning-Fresh hydraulic cementitious mixtures are caustic and may cause chemical burns to skin and tissue upon prolonged exposure.2)

 

Document History

  1. ASTM C231/C231M-24


    Standard Test Method for Air Content of Freshly Mixed Concrete by the Pressure Method

    • Most Recent
  2. ASTM C231/C231M-22


    Standard Test Method for Air Content of Freshly Mixed Concrete by the Pressure Method

    • Historical Version
  3. ASTM C231/C231M-17a


    Standard Test Method for Air Content of Freshly Mixed Concrete by the Pressure Method

    • Historical Version
  4. ASTM C231/C231M-17


    Standard Test Method for Air Content of Freshly Mixed Concrete by the Pressure Method

    • Historical Version
  5. ASTM C231/C231M-14

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    Standard Test Method for Air Content of Freshly Mixed Concrete by the Pressure Method

    • Historical Version
  6. ASTM C231/C231M-10


    Standard Test Method for Air Content of Freshly Mixed Concrete by the Pressure Method

    • Historical Version
  7. ASTM C231/C231M-09b


    Standard Test Method for Air Content of Freshly Mixed Concrete by the Pressure Method

    • Historical Version
  8. ASTM C231-09a


    Standard Test Method for Air Content of Freshly Mixed Concrete by the Pressure Method

    • Historical Version
  9. ASTM C231-09


    Standard Test Method for Air Content of Freshly Mixed Concrete by the Pressure Method

    • Historical Version
  10. ASTM C231-08c


    Standard Test Method for Air Content of Freshly Mixed Concrete by the Pressure Method

    • Historical Version
  11. ASTM C231-08b


    Standard Test Method for Air Content of Freshly Mixed Concrete by the Pressure Method

    • Historical Version
  12. ASTM C231-08a


    Standard Test Method for Air Content of Freshly Mixed Concrete by the Pressure Method

    • Historical Version
  13. ASTM C231-08


    Standard Test Method for Air Content of Freshly Mixed Concrete by the Pressure Method

    • Historical Version
  14. ASTM C231-04


    Standard Test Method for Air Content of Freshly Mixed Concrete by the Pressure Method

    • Historical Version
  15. ASTM C231-03


    Standard Test Method for Air Content of Freshly Mixed Concrete by the Pressure Method

    • Historical Version
  16. ASTM C231-97e1


    Standard Test Method for Air Content of Freshly Mixed Concrete by the Pressure Method

    • Historical Version