ASTM C42/C42M-03

Standard Test Method for Obtaining and Testing Drilled Cores and Sawed Beams of Concrete

SCOPE
1.1 This test method covers obtaining, preparing, and testing (1) cores drilled from concrete for length or compressive strength or splitting tensile strength determinations and ( 2) beams sawed from concrete for flexural strength determinations.
1.2 The values stated in either inch-pound units or SI units shall be regarded separately as standard. SI units are shown in brackets. The values stated in each system may not be exact equivalents; therefore, each system must be used independently of the other. Combining values from the two systems may result in non-conformance with the standard.
1.3 The text of this standard references notes and footnotes that provide explanatory material. These notes and footnotes (excluding those in tables and figures) shall not be considered as requirements of the standard.
1.4 This standard does not purport to address 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.

General Information

• Status: Historical
• Publication Date: 09-Jan-2003
• ICS: 91.100.30 - Concrete and concrete products
• Technical Committee: C09 - Concrete and Concrete Aggregates
• Drafting Committee: C09.61 - Testing for Strength

Relations

• Replaces: ASTM C42/C42M-99 - Standard Test Method for Obtaining and Testing Drilled Cores and Sawed Beams of Concrete
• Effective Date: 10-Jan-2003
• Replaced By: ASTM C42/C42M-04 - Standard Test Method for Obtaining and Testing Drilled Cores and Sawed Beams of Concrete
• Effective Date: 01-Jul-2004
• Referred By: ASTM D6489-99(2020) - Standard Test Method for Determining the Water Absorption of Hardened Concrete Treated With a Water Repellent Coating
• Effective Date: 10-Jan-2003
• Referred By: ASTM C1202-22e1 - Standard Test Method for Electrical Indication of Concrete’s Ability to Resist Chloride Ion Penetration
• Effective Date: 10-Jan-2003
• Referred By: ASTM C1556-22 - Standard Test Method for Determining the Apparent Chloride Diffusion Coefficient of Cementitious Mixtures by Bulk Diffusion
• Effective Date: 10-Jan-2003
• Referred By: ASTM C823/C823M-12(2017) - Standard Practice for Examination and Sampling of Hardened<brk/> Concrete in Constructions
• Effective Date: 10-Jan-2003
• Referred By: ASTM C1804-20 - Standard Specification for Spun Cast Prestressed Concrete Bases for Tapered Steel Lighting Poles
• Effective Date: 10-Jan-2003
• Referred By: ASTM D8337/D8337M-21 - Standard Test Method for Evaluation of Bond Properties of FRP Composite Applied to Concrete Substrate using Single-Lap Shear Test
• Effective Date: 10-Jan-2003
• Referred By: ASTM C1084-19 - Standard Test Method for Portland-Cement Content of Hardened Hydraulic-Cement Concrete
• Effective Date: 10-Jan-2003
• Referred By: ASTM C1231/C1231M-15 - Standard Practice for Use of Unbonded Caps in Determination of Compressive Strength of Hardened Cylindrical Concrete Specimens
• Effective Date: 10-Jan-2003
• Referred By: ASTM C1585-20 - Standard Test Method for Measurement of Rate of Absorption of Water by Hydraulic-Cement Concretes
• Effective Date: 10-Jan-2003
• Referred By: ASTM C1399/C1399M-10(2015) - Standard Test Method for Obtaining Average Residual-Strength of Fiber-Reinforced Concrete
• Effective Date: 10-Jan-2003
• Referred By: ASTM D7958/D7958M-17 - Standard Test Method for Evaluation of Performance for FRP Composite Bonded to Concrete Substrate using Beam Test
• Effective Date: 10-Jan-2003
• Referred By: ASTM C858-19 - Standard Specification for Underground Precast Concrete Utility Structures
• Effective Date: 10-Jan-2003
• Referred By: ASTM E488/E488M-22 - Standard Test Methods for Strength of Anchors in Concrete Elements
• Effective Date: 10-Jan-2003

Standards Content (Sample)

NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.
Contact ASTM International (www.astm.org) for the latest information
American Association State
Designation: C 42/C 42M – 03 Highway and Transportation Officials Standard
AASHTO No.: T24
Standard Test Method for
Obtaining and Testing Drilled Cores and Sawed Beams of
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Concrete
This standard is issued under the fixed designation C 42/C 42M; 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 642 Test Method for Density, Absorption, and Voids in
2
Hardened Concrete
1.1 This test method covers obtaining, preparing, and test-
C 670 Practice for Preparing Precision and Bias Statements
ing (1) cores drilled from concrete for length or compressive
2
for Test Methods for Construction Materials
strength or splitting tensile strength determinations and ( 2)
C 823 Practice for Examination and Sampling of Hardened
beams sawed from concrete for flexural strength determina-
2
Concrete in Constructions
tions.
C 1231/C 1231M Practice for Use of Unbonded Caps in
1.2 The values stated in either inch-pound units or SI units
Determination of Compressive Strength of Hardened Con-
shall be regarded separately as standard. SI units are shown in
2
crete Cylinders
brackets. The values stated in each system may not be exact
2.2 ACI Standards:
equivalents; therefore, each system must be used indepen-
3
318 Building Code Requirements for Structural Concrete
dently of the other. Combining values from the two systems
may result in non-conformance with the standard.
3. Significance and Use
1.3 The text of this standard references notes and footnotes
3.1 This test method provides standardized procedures for
that provide explanatory material. These notes and footnotes
obtaining and testing specimens to determine the compressive,
(excluding those in tables and figures) shall not be considered
splitting tensile, and flexural strength of in-place concrete.
as requirements of the standard.
3.2 Generally, test specimens are obtained when doubt
1.4 This standard does not purport to address the safety
exists about the in-place concrete quality due either to low
concerns, if any, associated with its use. It is the responsibility
strength test results during construction or signs of distress in
of the user of this standard to establish appropriate safety and
the structure. Another use of this method is to provide strength
health practices and determine the applicability of regulatory
information on older structures.
limitations prior to use.
3.3 Concrete strength is affected by the location of the
2. Referenced Documents concrete in a structural element, with the concrete at the bottom
tending to be stronger than the concrete at the top. Core
2.1 ASTM Standards:
strength is also affected by core orientation relative to the
C 39/C 39M Test Method for Compressive Strength of Cy-
2 horizontal plane of the concrete as placed, with strength
lindrical Concrete Specimens
tending to be lower when measured parallel to the horizontal
C 78 Test Method for Flexural Strength of Concrete (Using
4
2 plane. These factors shall be considered in planning the
Simple Beam with Third-Point Loading)
locations for obtaining concrete samples and in comparing
C 174/C 174M Test Method for Measuring Length of
2
strength test results.
Drilled Concrete Cores
3.4 The strength of concrete measured by tests of cores and
C 496 Test Method for Splitting Tensile Strength of Cylin-
2
beams is affected by the amount and distribution of moisture in
drical Concrete Specimens
the specimen at the time of test. There is no standard procedure
C 617 Practice for Capping Cylindrical Concrete Speci-
2
to condition a specimen that will ensure that, at the time of test,
mens
it will be in the identical moisture condition as concrete in the
1
This test method is under the jurisdiction of ASTM Committee C09 on
Concrete and Concrete Aggregates and is the direct responsibility of Subcommittee
3
C09.61 on Testing Concrete for Strength. Available from American Concrete Institute (ACI), P.O. Box 9094, Farmington
Current edition approved Jan. 10, 2003. Published April 2003. Originally Hills, MI 48333.
4
approved in 1921. Last previous edition approved in 1999 as C 42/C 42M-99. Neville, A., “Core Tests: Easy to Perform, Not Easy to Interpret,” Concrete
2
Annual Book of ASTM Standards, Vol 04.02. International, Vol. 23, No. 11, November 2001, pp. 59-68.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.
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C 42/C 42M – 03
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