ASTM C172/C172M-17
(Practice)Standard Practice for Sampling Freshly Mixed Concrete
Standard Practice for Sampling Freshly Mixed Concrete
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.
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 and from continuous mixing equipment as described in Specification C685/C685M.
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, health, and environmental 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)
1.6 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.
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This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the
Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.
Designation: C172/C172M − 17
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.
1. Scope* and may cause chemical burns to skin and tissue upon
2
prolonged exposure. )
1.1 This practice covers procedures for obtaining represen-
1.6 This international standard was developed in accor-
tative samples of fresh concrete as delivered to the project site
dance with internationally recognized principles on standard-
on which tests are to be performed to determine compliance
ization established in the Decision on Principles for the
with quality requirements of the specifications under which the
Development of International Standards, Guides and Recom-
concrete is furnished (Note 1). The practice includes sampling
mendations issued by the World Trade Organization Technical
from stationary, paving and truck mixers, and from agitating
Barriers to Trade (TBT) Committee.
and nonagitating equipment used to transport central-mixed
concrete and from continuous mixing equipment as described
2. Referenced Documents
in Specification C685/C685M.
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2.1 ASTM Standards:
1.2 The values stated in either SI units or inch-pound units
C685/C685M Specification for Concrete Made by Volumet-
are to be regarded separately as standard. The values stated in
ric Batching and Continuous Mixing
each system may not be exact equivalents; therefore, each
E11 Specification for Woven Wire Test Sieve Cloth and Test
system shall be used independently of the other. Combining
Sieves
values from the two systems may result in non-conformance
with the standard.
3. Significance and Use
NOTE 1—Composite samples are required by this practice, unless
3.1 This practice is intended to provide standard require-
specifically excepted by procedures governing the tests to be performed
ments and procedures for sampling freshly mixed concrete
such as tests to determine uniformity of consistency and mixer efficiency.
from different containers used in the production or transporta-
Procedures used to select the specific test batches are not described in this
tion of concrete. The detailed requirements as to materials,
practice, but it is recommended that random sampling be used to
determine overall specification compliance.
mixtures, air content, temperature, number of specimens,
slump, interpretation of results, and precision and bias are in
1.3 This practice also covers the procedures to be used for
specific test methods.
preparing a sample of concrete for further testing where it is
desirable or necessary to remove the aggregate larger than a
4. Sampling
designated size. This removal of larger aggregate particles is
preferably accomplished by wet-sieving.
4.1 The elapsed time shall not exceed 15 min. between
obtaining the first and final portions of the composite sample.
1.4 The text of this standard references notes and footnotes
4.1.1 Transport the individual samples to the place where
whichprovideexplanatorymaterialandshallnotbeconsidered
fresh concrete tests are to be performed or where test speci-
as requirements of the practice.
mens are to be molded. They shall be combined and remixed
1.5 This standard does not purport to address all of the
with a shovel the minimum amount necessary to ensure
safety concerns, if any, associated with its use. It is the
uniformity and compliance with the maximum time limits
responsibility of the user of this standard to establish appro-
specified in 4.1.2.
priate safety, health, and environmental practices and deter-
4.1.2 Start tests for slump, temperature, and air content
mine the applicability of regulatory limitations prior to use.
within 5 min after obtaining the final portion of the composite
(Warning—Fresh hydraulic cementitious mixtures are caustic
sample. Complete these tests expeditiously. Start molding
1 2
This practice is under the jurisdiction of ASTM Committee C09 on Concrete Section on Safety Precautions, Manual of Aggregate and Concrete Testing,
andConcreteAggregatesandisthedirectresponsibilityofSubcommitteeC09.60on 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, 2017. Published October 2017. Originally contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
approved in 1942. Last previous edition approved in
...
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/C172M − 14a C172/C172M − 17
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.
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
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 and from continuous mixing equipment as described in Specification
C685/C685M.
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 safety, health, and healthenvironmental practices and determine the
applicability of regulatory limitations prior to use. (Warning—Fresh hydraulic cementitious mixtures are caustic and may cause
2
chemical burns to skin and tissue upon prolonged exposure. )
1.6 This international standard was developed in accordance with internationally recognized principles on standardization
established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued
by the World Trade Organization Technical Barriers to Trade (TBT) Committee.
2. Referenced Documents
3
2.1 ASTM Standards:
E11 Specification for Woven Wire Test Sieve Cloth and Test Sieves
C685/C685M Specification for Concrete Made by Volumetric Batching and Continuous Mixing
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.
1
This practice is under the jurisdiction of ASTM Committee C09 on Concrete and Concrete Aggregates and is the direct responsibility of Subcommittee C09.60 on Testing
Fresh Concrete.
Current edition approved Oct. 1, 2014Oct. 1, 2017. Published November 2014October 2017. Originally approved in 1942. Last previous edition approved in 2014 as
C172C172/C172M–14.–14a. DOI: 10.1520/C0172_C0172M-14A.10.1520/C0172_C0172M-17.
2
Section on Safety Precautions, Manual of Aggregate and Concrete Testing, Annual Book of ASTM Standards, Vol 04.02.
3
For referenced ASTM standards, visit the ASTM website, www.astm.org, or contact ASTM 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 Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
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