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ASTM C 172 REV A Document Information:
Title
Standard Practice for Sampling Freshly Mixed Concrete
ASTM International
Publication Date:
Dec 15, 2007
Scope:
This practice covers procedures for obtaining representative
samples of fresh concrete as delivered to the project site on which
tests are to be performed to determine compliance with quality
requirements of the specifications under which the concrete is
furnished (Note 1). The practice includes sampling from stationary,
paving and truck mixers, and from agitating and nonagitating
equipment used to transport central-mixed concrete.
The values stated in SI units are to be regarded as the
standard. The values shown in parentheses are provided for
information only.
NOTE 1—Composite samples are required by this practice, unless
specifically excepted by procedures governing the tests to be
performed such as tests to determine uniformity of consistency and
mixer efficiency. Procedures used to select the specific test
batches are not described in this practice, but it is recommended
that random sampling be used to determine overall specification
compliance.
This practice also covers the procedures to be used for
preparing a sample of concrete for further testing where it is
desirable or necessary to remove the aggregate larger than a
designated size. This removal of larger aggregate particles is
preferably accomplished by wet-sieving.
The text of this standard references notes and footnotes which
provide explanatory material and shall not be considered as
requirements of the practice.
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)
*A Summary of Changes section appears at the end of this
standard.
2 Section on Safety Precautions, Manual of Aggregate
and Concrete Testing, Annual Book of ASTM Standards, Vol
04.02.
Keywords:
- air content
- batch
- composite sample
- concrete
- slump
- temperature
- wet-sieving
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