ASTM C172/C172M-10
(Practice)Standard Practice for Sampling Freshly Mixed Concrete
Standard Practice for Sampling Freshly Mixed Concrete
SIGNIFICANCE AND USE
This practice is intended to provide standard requirements and procedures for sampling freshly mixed concrete from different containers used in the production or transportation of concrete. The detailed requirements as to materials, mixtures, air content, temperature, number of specimens, slump, interpretation of results, and precision and bias are in specific test methods.
SCOPE
1.1 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.
1.2 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.
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.
1.3 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.
1.4 The text of this standard references notes and footnotes which provide explanatory material and shall not be considered as requirements of the practice.
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. (WarningFresh hydraulic cementitious mixtures are caustic and may cause chemical burns to skin and tissue upon prolonged exposure. )
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Designation: C172/C172M − 10
StandardPractice for
1
Sampling Freshly Mixed Concrete
This standard is issued under the fixed designation C172/C172M; the number immediately following the designation indicates the year
of original adoption or, in the case of revision, the year of last revision. A number in parentheses indicates the year of last reapproval.
A superscript epsilon (´) indicates an editorial change since the last revision or reapproval.
1. Scope* hydraulic cementitious mixtures are caustic and may cause
2
chemical burns to skin and tissue upon prolonged exposure. )
1.1 This practice covers procedures for obtaining represen-
tative samples of fresh concrete as delivered to the project site
2. Referenced Documents
on which tests are to be performed to determine compliance
3
2.1 ASTM Standards:
with quality requirements of the specifications under which the
E11 Specification for Woven Wire Test Sieve Cloth and Test
concrete is furnished (Note 1). The practice includes sampling
Sieves
from stationary, paving and truck mixers, and from agitating
and nonagitating equipment used to transport central-mixed
3. Significance and Use
concrete.
3.1 This practice is intended to provide standard require-
1.2 The values stated in either SI units or inch-pound units
ments and procedures for sampling freshly mixed concrete
are to be regarded separately as standard. The values stated in from different containers used in the production or transporta-
each system may not be exact equivalents; therefore, each
tion of concrete. The detailed requirements as to materials,
system shall be used independently of the other. Combining mixtures, air content, temperature, number of specimens,
slump, interpretation of results, and precision and bias are in
values from the two systems may result in non-conformance
specific test methods.
with the standard.
NOTE 1—Composite samples are required by this practice, unless
4. Sampling
specifically excepted by procedures governing the tests to be performed
4.1 The elapsed time shall not exceed 15 min. between
such as tests to determine uniformity of consistency and mixer efficiency.
obtaining the first and final portions of the composite sample.
Procedures used to select the specific test batches are not described in this
practice, but it is recommended that random sampling be used to 4.1.1 Transport the individual samples to the place where
determine overall specification compliance.
fresh concrete tests are to be performed or where test speci-
mens are to be molded. They shall be combined and remixed
1.3 This practice also covers the procedures to be used for
with a shovel the minimum amount necessary to ensure
preparing a sample of concrete for further testing where it is
uniformity and compliance with the maximum time limits
desirable or necessary to remove the aggregate larger than a
specified in 4.1.2.
designated size. This removal of larger aggregate particles is
4.1.2 Start tests for slump, temperature, and air content
preferably accomplished by wet-sieving.
within 5 min after obtaining the final portion of the composite
1.4 The text of this standard references notes and footnotes
sample. Complete these tests expeditiously. Start molding
whichprovideexplanatorymaterialandshallnotbeconsidered
specimens for strength tests within 15 min after fabricating the
as requirements of the practice. composite sample. Expeditiously obtain and use the sample
andprotectthesamplefromthesun,wind,andothersourcesof
1.5 This standard does not purport to address all of the
rapid evaporation, and from contamination.
safety concerns, if any, associated with its use. It is the
responsibility of the user of this standard to establish appro-
5. Procedure
priate safety and health practices and determine the applica-
5.1 Size of Sample—Make the samples to be used for
bility of regulatory limitations prior to use. (Warning—Fresh
3
strength tests a minimum of 28 L [1 ft ]. Smaller samples are
1 2
This practice is under the jurisdiction of ASTM Committee C09 on Concrete Section on Safety Precautions, Manual of Aggregate and Concrete Testing,
and ConcreteAggregatesand is the direct responsibility of Subcommittee C09.60 on Annual Book of ASTM Standards, Vol 04.02.
3
Testing Fresh Concrete. For referenced ASTM standards, visit the ASTM website, www.astm.org, or
Current edition approved Oct. 1, 2010. Published November 2010. Originally contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
approved in 1942. Last previous edition approved in 2008 as C172–08 DOI: Standards volume information, refer to the standard’s Document Summary page on
10.1520/C0172_C0172M-10. the ASTM website.
*A Summary of Changes section appears at the end of this standard
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959.
...
This document is not an ASTM standard and is intended only to provide the user of an ASTM standard an indication of what changes have been made to the previous version. Because
it may not be technically possible to adequately depict all changes accurately, ASTM recommends that users consult prior editions as appropriate. In all cases only the current version
of the standard as published by ASTM is to be considered the official document.
Designation:C172–08 Designation: C172/C172M – 10
Standard Practice for
1
Sampling Freshly Mixed Concrete
This standard is issued under the fixed designation C172/C172M; the number immediately following the designation indicates the year
of original adoption or, in the case of revision, the year of last revision. A number in parentheses indicates the year of last reapproval.
A superscript epsilon (´) indicates an editorial change since the last revision or reapproval.
This standard has been approved for use by agencies of the Department of Defense.
1. Scope*
1.1 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
isfurnished(Note1).Thepracticeincludessamplingfromstationary,pavingandtruckmixers,andfromagitatingandnonagitating
equipment used to transport central-mixed concrete.
1.2The values stated in SI units are to be regarded as standard. The values given in parentheses are mathematical conversions
to inch-pound units that are provided for information only and are not considered standard.
1.2 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.
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.
1.3 Thispracticealsocoverstheprocedurestobeusedforpreparingasampleofconcreteforfurthertestingwhereitisdesirable
or necessary to remove the aggregate larger than a designated size. This removal of larger aggregate particles is preferably
accomplished by wet-sieving.
1.4 The text of this standard references notes and footnotes which provide explanatory material and shall not be considered as
requirements of the practice.
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
2
tissue upon prolonged exposure. )
2. Referenced Documents
3
2.1 ASTM Standards:
E11 Specification for Woven Wire Test Sieve Cloth and Test Sieves
3. Significance and Use
3.1 This practice is intended to provide standard requirements and procedures for sampling freshly mixed concrete from
different containers used in the production or transportation of concrete. The detailed requirements as to materials, mixtures, air
content, temperature, number of specimens, slump, interpretation of results, and precision and bias are in specific test methods.
4. Sampling
4.1 The elapsed time shall not exceed 15 min. between obtaining the first and final portions of the composite sample.
4.1.1 Transport the individual samples to the place where fresh concrete tests are to be performed or where test specimens are
to be molded. They shall be combined and remixed with a shovel the minimum amount necessary to ensure uniformity and
compliance with the maximum time limits specified in 4.1.2.
1
This practice is under the jurisdiction ofASTM Committee C09 on Concrete and ConcreteAggregates and is the direct responsibility of Subcommittee C09.60 onTesting
Fresh Concrete.
Current edition approved JuneOct. 1, 2008.2010. Published July 2008.November 2010. Originally approved in 1942. Last previous edition approved in 20072008 as
C172–07a.C172–08 DOI: 10.1520/C0172_C0172M-108.
2
Section on Safety Precautions, Manual of Aggregate and Concrete Testing, Annual Book of ASTM Standards, Vol 04.02.
3
For referencedASTM standards, visit theASTM website, www.astm.org, or contactASTM Customer Service at service@astm.org. For Annual Book of ASTM Standards
volume information, refer to the standard’s Document Summary page on the ASTM website.
*A Summary of Changes section appears at the end of this standard.
Copyright © ASTM International, 100 Barr
...
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