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ASTM C173/C173M-08a

Historical Revision

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

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1.1 This test method covers determination of the air content of freshly mixed concrete containing any type of aggregate, whether it be dense, cellular, or lightweight.

1.2 The values stated in either inch-pound or SI units shall be regarded separately as standard. The SI units are shown in brackets. The values stated are not exact equivalents; therefore each system must be used independently of the other. Combining values from the two units may result in nonconformance.

1.3 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.(WarningFresh hydraulic cementitious mixtures are caustic and may cause chemical burns to skin and tissue upon prolonged exposure. )

This test method covers the determination of the air content of freshly mixed concrete. It measures the air contained in the mortar fraction of the concrete, but is not affected by air that may be present inside porous aggregate particles.

Therefore, this is the appropriate test to determine the air content of concretes containing lightweight aggregates, air-cooled slag, and highly porous or vesicular natural aggregates.

This test method requires the addition of sufficient isopropyl alcohol, when the meter is initially being filled with water, so that after the first or subsequent rollings little or no foam collects in the neck of the top section of the meter. If more foam is present than that equivalent to 2 % air above the water level, the test is declared invalid and must be repeated using a larger quantity of alcohol. Addition of alcohol to dispel foam any time after the initial filling of the meter to the zero mark is not permitted.

The air content of hardened concrete may be either higher or lower than that determined by this test method. This depends upon the methods and amounts of consolidation effort applied to the concrete from which the hardened concrete specimen is taken; uniformity and stability of the air bubbles in the fresh and hardened concrete; accuracy of the microscopic examination, if used; time of comparison; environmental exposure; stage in the delivery, placement and consolidation processes at which the air content of the unhardened concrete is determined, that is, before or after the concrete goes through a pump; and other factors.

SDO ASTM: ASTM International
Document Number C173
Publication Date Dec. 15, 2008
Language en - English
Page Count 8
Revision Level 08a
Supercedes
Committee C09.60
Publish Date Document Id Type View
June 1, 2024 C0173_C0173M-24A Revision
Jan. 1, 2024 C0173_C0173M-24 Revision
Sept. 1, 2023 C0173_C0173M-23 Revision
Feb. 1, 2016 C0173_C0173M-16 Revision
Jan. 1, 2014 C0173_C0173M-14 Revision
Nov. 1, 2012 C0173_C0173M-12 Revision
Oct. 1, 2010 C0173_C0173M-10B Revision
July 1, 2010 C0173_C0173M-10A Revision
Feb. 1, 2010 C0173_C0173M-10 Revision
June 1, 2009 C0173_C0173M-09 Revision
Dec. 15, 2008 C0173_C0173M-08A Revision
March 1, 2008 C0173_C0173M-08 Revision
June 1, 2007 C0173_C0173M-07 Revision
March 10, 2001 C0173_C0173M-01E01 Revision
March 10, 2001 C0173_C0173M-01 Revision