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ASTM International - ASTM C231-09a

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

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Organization: ASTM International
Publication Date: 1 July 2009
Status: inactive
Page Count: 10
ICS Code (Concrete and concrete products): 91.100.30
significance And Use:

This test method covers the determination of the air content of freshly mixed concrete. The test determines the air content of freshly mixed concrete exclusive of any air that may exist inside... View More

scope:

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 C 173/C 173M 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 inch-pound units are to be regarded as standard. The values given in parentheses are mathematical conversions to SI units that are provided for information only and are not considered 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.)

Document History

ASTM C231-09a
July 1, 2009
Standard Test Method for Air Content of Freshly Mixed Concrete by the Pressure Method
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...
June 1, 2009
Standard Test Method for Air Content of Freshly Mixed Concrete by the Pressure Method
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...
October 1, 2008
Standard Test Method for Air Content of Freshly Mixed Concrete by the Pressure Method
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...
June 1, 2008
Standard Test Method for Air Content of Freshly Mixed Concrete by the Pressure Method
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...
April 15, 2008
Standard Test Method for Air Content of Freshly Mixed Concrete by the Pressure Method
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...
January 15, 2008
Standard Test Method for Air Content of Freshly Mixed Concrete by the Pressure Method
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...
July 1, 2004
Standard Test Method for Air Content of Freshly Mixed Concrete by the Pressure Method
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...
July 10, 2003
Standard Test Method for Air Content of Freshly Mixed Concrete by the Pressure Method
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...
December 21, 1998
Standard Test Method for Air Content of Freshly Mixed Concrete by the Pressure Method
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...
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