ASTM C39/C39M-04a
(Test Method)Standard Test Method for Compressive Strength of Cylindrical Concrete Specimens
Standard Test Method for Compressive Strength of Cylindrical Concrete Specimens
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 unit weight in excess of 50 lb/ft3 [800 kg/m3].
1.2 The values stated in either inch-pound or SI units are to be regarded separately as standard. The SI 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 nonconformance 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.
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–04a
Standard Test Method for
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Compressive Strength of Cylindrical Concrete Specimens
This standard is issued under the fixed designation C 39/C 39M; 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 (e) 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 C 42/C 42M Test Method for Obtaining and Testing Drilled
Cores and Sawed Beams of Concrete
1.1 This test method covers determination of compressive
C 192/C 192M Practice for Making and Curing Concrete
strength of cylindrical concrete specimens such as molded
Test Specimens in the Laboratory
cylinders and drilled cores. It is limited to concrete having a
3 3
C 617 Practice for Capping Cylindrical Concrete Speci-
unit weight in excess of 50 lb/ft [800 kg/m ].
mens
1.2 The values stated in either inch-pound or SI units are to
C 670 Practice for Preparing Precision and Bias Statements
be regarded separately as standard. The SI units are shown in
for Test Methods for Construction Materials
brackets. The values stated in each system may not be exact
C 873 Test Method for Compressive Strength of Concrete
equivalents;therefore,eachsystemshallbeusedindependently
Cylinders Cast in Place in Cylindrical Molds
of the other. Combining values from the two systems may
C 1077 PracticeforLaboratoriesTestingConcreteandCon-
result in nonconformance with the standard.
crete Aggregates for Use in Construction and Criteria for
1.3 This standard does not purport to address all of the
Laboratory Evaluation
safety concerns, if any, associated with its use. It is the
C 1231/C 1231M Practice for Use of Unbonded Caps in
responsibility of the user of this standard to establish appro-
Determination of Compressive Strength of Hardened Con-
priate safety and health practices and determine the applica-
crete Cylinders
bility of regulatory limitations prior to use. (Warning—Means
E 4 Practices for Force Verification of Testing Machines
should be provided to contain concrete fragments during
E 74 Practice for Calibration of Force-Measuring Instru-
sudden rupture of specimens. Tendency for sudden rupture
ments for Verifying the Force Indication of Testing Ma-
increaseswithincreasingconcretestrengthanditismorelikely
chines
when the testing machine is relatively flexible. The safety
Manual of Aggregate and Concrete Testing
precautions given in the Manual of Aggregate and Concrete
Testing are recommended.)
3. Summary of Test Method
1.4 The text of this standard references notes which provide
3.1 This test method consists of applying a compressive
explanatory material. These notes shall not be considered as
axialloadtomoldedcylindersorcoresataratewhichiswithin
requirements of the standard.
a prescribed range until failure occurs. The compressive
2. Referenced Documents strength of the specimen is calculated by dividing the maxi-
2 mum load attained during the test by the cross-sectional area of
2.1 ASTM Standards:
the specimen.
C 31/C 31M Practice for Making and Curing Concrete Test
Specimens in the Field
4. Significance and Use
4.1 Care must be exercised in the interpretation of the
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This test method is under the jurisdiction of ASTM Committee C09 on significanceofcompressivestrengthdeterminationsbythistest
Concrete and ConcreteAggregates and is the direct responsibility of Subcommittee
methodsincestrengthisnotafundamentalorintrinsicproperty
C09.61 on Testing Concrete for Strength.
of concrete made from given materials. Values obtained will
Current edition approved Nov. 1, 2004. Published November 2004. Originally
dependonthesizeandshapeofthespecimen,batching,mixing
approved in 1921. Last previous edition approved in 2004 as C 39/C 39M – 04.
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
procedures, the methods of sampling, molding, and fabrication
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
and the age, temperature, and moisture conditions during
Standards volume information, refer to the standard’s Document Summary page on
curing.
the ASTM website.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.
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C39/C39M–04a
4.2 This test method is used to determine compressive 5.1.3.2 The accuracy of the testing machine shall be verified
strength of cylindrical specimens prepared and cured in accor- by applying five test loads in four approximately equal
dance with Practices C 31/C 31M, C 192/C 192M, C 617, and increments in ascending order.The difference between any t
...
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