ASTM C39/C39M-15a
(Test Method)Standard Test Method for Compressive Strength of Cylindrical Concrete Specimens
Standard Test Method for Compressive Strength of Cylindrical Concrete Specimens
SIGNIFICANCE AND USE
4.1 Care must be exercised in the interpretation of the significance of compressive strength determinations by this test method since strength is not a fundamental or intrinsic property of concrete made from given materials. Values obtained will depend on the size and shape of the specimen, batching, mixing procedures, the methods of sampling, molding, and fabrication and the age, temperature, and moisture conditions during curing.
4.2 This test method is used to determine compressive strength of cylindrical specimens prepared and cured in accordance with Practices C31/C31M, C192/C192M, C617/C617M, and C1231/C1231M and Test Methods C42/C42M and C873/C873M.
4.3 The results of this test method are used as a basis for quality control of concrete proportioning, mixing, and placing operations; determination of compliance with specifications; control for evaluating effectiveness of admixtures; and similar uses.
4.4 The individual who tests concrete cylinders for acceptance testing shall meet the concrete laboratory technician requirements of Practice C1077, including an examination requiring performance demonstration that is evaluated by an independent examiner.
Note 1: Certification equivalent to the minimum guidelines for ACI Concrete Laboratory Technician, Level I or ACI Concrete Strength Testing Technician will satisfy this requirement.
SCOPE
1.1 This test method covers determination of compressive strength of cylindrical concrete specimens such as molded cylinders and drilled cores. It is limited to concrete having a density in excess of 800 kg/m3 [50 lb/ft3].
1.2 The values stated in either SI units or inch-pound units are to be regarded separately as standard. The inch-pound units are shown in brackets. 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.
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. (Warning—Means should be provided to contain concrete fragments during sudden rupture of specimens. Tendency for sudden rupture increases with increasing concrete strength and it is more likely when the testing machine is relatively flexible. The safety precautions given in the Manual of Aggregate and Concrete Testing are recommended.)
1.4 The text of this standard references notes which provide explanatory material. These notes shall not be considered as requirements of the standard.
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Designation: C39/C39M − 15a
StandardTest Method for
1
Compressive Strength of Cylindrical Concrete Specimens
This standard is issued under the fixed designation C39/C39M; 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 U.S. Department of Defense.
1. Scope* C192/C192M Practice for Making and Curing Concrete Test
Specimens in the Laboratory
1.1 This test method covers determination of compressive
C617/C617M Practice for Capping Cylindrical Concrete
strength of cylindrical concrete specimens such as molded
Specimens
cylinders and drilled cores. It is limited to concrete having a
3 3
C670 Practice for Preparing Precision and Bias Statements
density in excess of 800 kg/m [50 lb/ft ].
for Test Methods for Construction Materials
1.2 The values stated in either SI units or inch-pound units
C873/C873M Test Method for Compressive Strength of
are to be regarded separately as standard.The inch-pound units
Concrete Cylinders Cast in Place in Cylindrical Molds
are shown in brackets. The values stated in each system may
C1077 Practice forAgencies Testing Concrete and Concrete
not be exact equivalents; therefore, each system shall be used
Aggregates for Use in Construction and Criteria for
independently of the other. Combining values from the two
Testing Agency Evaluation
systems may result in non-conformance with the standard.
C1231/C1231M Practice for Use of Unbonded Caps in
1.3 This standard does not purport to address all of the
DeterminationofCompressiveStrengthofHardenedCon-
safety concerns, if any, associated with its use. It is the
crete Cylinders
responsibility of the user of this standard to establish appro-
E4 Practices for Force Verification of Testing Machines
priate safety and health practices and determine the applica-
E74 Practice of Calibration of Force-Measuring Instruments
bility of regulatory limitations prior to use. (Warning—Means
for Verifying the Force Indication of Testing Machines
should be provided to contain concrete fragments during
Manual of Aggregate and Concrete Testing
sudden rupture of specimens. Tendency for sudden rupture
increaseswithincreasingconcretestrengthanditismorelikely
3. Summary of Test Method
when the testing machine is relatively flexible. The safety
3.1 This test method consists of applying a compressive
precautions given in the Manual of Aggregate and Concrete
axial load to molded cylinders or cores at a rate which is within
Testing are recommended.)
a prescribed range until failure occurs. The compressive
1.4 The text of this standard references notes which provide
strength of the specimen is calculated by dividing the maxi-
explanatory material. These notes shall not be considered as
mum load attained during the test by the cross-sectional area of
requirements of the standard.
the specimen.
2. Referenced Documents
2
4. Significance and Use
2.1 ASTM Standards:
C31/C31M Practice for Making and Curing Concrete Test
4.1 Care must be exercised in the interpretation of the
Specimens in the Field
significanceofcompressivestrengthdeterminationsbythistest
C42/C42M Test Method for Obtaining and Testing Drilled
methodsincestrengthisnotafundamentalorintrinsicproperty
Cores and Sawed Beams of Concrete
of concrete made from given materials. Values obtained will
dependonthesizeandshapeofthespecimen,batching,mixing
procedures, the methods of sampling, molding, and fabrication
1
This test method is under the jurisdiction of ASTM Committee C09 on
and the age, temperature, and moisture conditions during
Concrete and ConcreteAggregates and is the direct responsibility of Subcommittee
curing.
C09.61 on Testing for Strength.
Current edition approved April 1, 2015. Published May 2015. Originally
4.2 This test method is used to determine compressive
approved in 1921. Last previous edition approved in 2015 as C39/C39M – 15. DOI:
10.1520/C0039_C0039M-15A.
strength of cylindrical specimens prepared and cured in accor-
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
dance with Practices C31/C31M, C192/C192M, C617/C617M,
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
and C1231/C1231M and Test Methods C42/C42M and C873/
Standards volume information, refer to the standard’s Document Summary page on
the ASTM website. C873M.
*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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C39/C39M − 15a
4.3 The res
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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: C39/C39M − 15 C39/C39M − 15a
Standard Test Method for
1
Compressive Strength of Cylindrical Concrete Specimens
This standard is issued under the fixed designation C39/C39M; 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 U.S. Department of Defense.
1. Scope*
1.1 This test method covers determination of compressive strength of cylindrical concrete specimens such as molded cylinders
3 3
and drilled cores. It is limited to concrete having a density in excess of 800 kg/m [50 lb/ft ].
1.2 The values stated in either SI units or inch-pound units are to be regarded separately as standard. The inch-pound units are
shown in brackets. 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.
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. (Warning—Means should be provided to contain concrete fragments during sudden rupture of specimens.
Tendency for sudden rupture increases with increasing concrete strength and it is more likely when the testing machine is relatively
flexible. The safety precautions given in the Manual of Aggregate and Concrete Testing are recommended.)
1.4 The text of this standard references notes which provide explanatory material. These notes shall not be considered as
requirements of the standard.
2. Referenced Documents
2
2.1 ASTM Standards:
C31/C31M Practice for Making and Curing Concrete Test Specimens in the Field
C42/C42M Test Method for Obtaining and Testing Drilled Cores and Sawed Beams of Concrete
C192/C192M Practice for Making and Curing Concrete Test Specimens in the Laboratory
C617/C617M Practice for Capping Cylindrical Concrete Specimens
C670 Practice for Preparing Precision and Bias Statements for Test Methods for Construction Materials
C873/C873M Test Method for Compressive Strength of Concrete Cylinders Cast in Place in Cylindrical Molds
C1077 Practice for Agencies Testing Concrete and Concrete Aggregates for Use in Construction and Criteria for Testing Agency
Evaluation
C1231/C1231M Practice for Use of Unbonded Caps in Determination of Compressive Strength of Hardened Concrete Cylinders
E4 Practices for Force Verification of Testing Machines
E74 Practice of Calibration of Force-Measuring Instruments for Verifying the Force Indication of Testing Machines
Manual of Aggregate and Concrete Testing
3. Summary of Test Method
3.1 This test method consists of applying a compressive axial load to molded cylinders or cores at a rate which is within a
prescribed range until failure occurs. The compressive strength of the specimen is calculated by dividing the maximum load
attained during the test by the cross-sectional area of the specimen.
4. Significance and Use
4.1 Care must be exercised in the interpretation of the significance of compressive strength determinations by this test method
since strength is not a fundamental or intrinsic property of concrete made from given materials. Values obtained will depend on
1
This test method is under the jurisdiction of ASTM Committee C09 on Concrete and Concrete Aggregates and is the direct responsibility of Subcommittee C09.61 on
Testing for Strength.
Current edition approved March 15, 2015April 1, 2015. Published May 2015. Originally approved in 1921. Last previous edition approved in 20142015 as C39/C39M
– 14a.15. DOI: 10.1520/C0039_C0039M-15.10.1520/C0039_C0039M-15A.
2
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
1
---------------------- Page: 1 ----------------------
C39/C39M − 15a
the size and shape of the specimen, batching, m
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