ASTM C1604/C1604M-05(2019)
(Test Method)Standard Test Method for Obtaining and Testing Drilled Cores of Shotcrete
Standard Test Method for Obtaining and Testing Drilled Cores of Shotcrete
SIGNIFICANCE AND USE
4.1 This test method provides standardized procedures for obtaining cored specimens to determine the compressive strength and splitting tensile strength of shotcrete during pre-construction, during construction, and from older shotcrete structures.
4.2 Generally, test specimens are obtained in situ when doubt exists about the in-place shotcrete quality due either to low strength test results during construction or signs of distress in the structure. Other uses of this method are to provide specimens for acceptance testing, construction control and to assess the condition, quality and uniformity of the shotcrete in accordance with Practice C823/C823M (see Note 1).
4.3 Specimens obtained by this method are used to verify the thickness of shotcrete and aid in the visual assessment of the shotcrete quality, workmanship, defects, shotcrete-to-substrate bond and the condition of any reinforcement used in the shotcrete.4
4.4 Shotcrete strength is affected by the location of the shotcrete in a structure. Vertical, sub-horizontal and overhead elements of the shotcrete structure may show variability. Core strength is affected by core orientation relative to direction of shotcrete application. These factors shall be considered in planning the locations for obtaining shotcrete samples and in interpreting strength test results.
4.5 Shotcrete is applied in single or multiple layers, as plain shotcrete, reinforced shotcrete, or fiber-reinforced shotcrete. Core samples containing wire-mesh and reinforcing bars shall not be used for compressive strength testing.
4.6 The strength of shotcrete is affected by moisture content, the specified moisture conditioning procedure for cores is intended to provide test specimens with reproducible moisture contents that minimize within-laboratory and between-laboratory variations.
4.7 Sample acquisition may require a combination of core-drilling, sawing, and grinding that may have the potential to adversely affect the sample con...
SCOPE
1.1 This test method covers obtaining, preparing, and testing cores drilled from shotcrete for length, compressive strength, or splitting tensile 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 nonconformance 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 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.
1.5 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.
General Information
Relations
Standards Content (Sample)
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: C1604/C1604M − 05 (Reapproved 2019)
Standard Test Method for
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Obtaining and Testing Drilled Cores of Shotcrete
This standard is issued under the fixed designation C1604/C1604M; 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 C174/C174M Test Method for MeasuringThickness of Con-
crete Elements Using Drilled Concrete Cores
1.1 This test method covers obtaining, preparing, and test-
C496/C496M Test Method for Splitting Tensile Strength of
ing cores drilled from shotcrete for length, compressive
Cylindrical Concrete Specimens
strength, or splitting tensile strength determinations.
C617/C617M Practice for Capping Cylindrical Concrete
1.2 The values stated in either inch-pound units or SI units
Specimens
shall be regarded separately as standard. SI units are shown in
C670 Practice for Preparing Precision and Bias Statements
brackets. The values stated in each system may not be exact
for Test Methods for Construction Materials
equivalents; therefore, each system must be used indepen-
C823/C823M Practice for Examination and Sampling of
dently of the other. Combining values from the two systems
Hardened Concrete in Constructions
may result in nonconformance with the standard.
C1140/C1140M Practice for Preparing and Testing Speci-
mens from Shotcrete Test Panels
1.3 The text of this standard references notes and footnotes
that provide explanatory material. These notes and footnotes C1231/C1231M Practice for Use of Unbonded Caps in
Determination of Compressive Strength of Hardened Cy-
(excluding those in tables and figures) shall not be considered
as requirements of the standard. lindrical Concrete Specimens
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2.2 ACI Standards:
1.4 This standard does not purport to address all of the
318 Building Code Requirements for Structural Concrete
safety concerns, if any, associated with its use. It is the
506.2 Specification for Shotcreting
responsibility of the user of this standard to establish appro-
506.4R Guide for the Evaluation of Shotcrete
priate safety, health, and environmental practices and deter-
mine the applicability of regulatory limitations prior to use.
3. Terminology
1.5 This international standard was developed in accor-
dance with internationally recognized principles on standard-
3.1 For definitions of terms used in this standard, refer to
ization established in the Decision on Principles for the
Terminology C125.
Development of International Standards, Guides and Recom-
mendations issued by the World Trade Organization Technical
4. Significance and Use
Barriers to Trade (TBT) Committee.
4.1 This test method provides standardized procedures for
obtaining cored specimens to determine the compressive
2. Referenced Documents
strength and splitting tensile strength of shotcrete during
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2.1 ASTM Standards:
pre-construction, during construction, and from older shotcrete
C39/C39M Test Method for Compressive Strength of Cylin-
structures.
drical Concrete Specimens
4.2 Generally, test specimens are obtained in situ when
C42/C42M Test Method for Obtaining and Testing Drilled
doubt exists about the in-place shotcrete quality due either to
Cores and Sawed Beams of Concrete
low strength test results during construction or signs of distress
C125 Terminology Relating to Concrete and Concrete Ag-
in the structure. Other uses of this method are to provide
gregates
specimens for acceptance testing, construction control and to
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assess the condition, quality and uniformity of the shotcrete in
This test method is under the jurisdiction of ASTM Committee C09 on
Concrete and ConcreteAggregates and is the direct responsibility of Subcommittee
accordance with Practice C823/C823M (see Note 1).
C09.46 on Shotcrete.
4.3 Specimens obtained by this method are used to verify
Current edition approved Dec. 15, 2019. Published December 2019. Originally
approved in 2005. Last previous edition approved in 2012 as C1604/
the thickness of shotcrete and aid in the visual assessment of
C1604M–05(2012). DOI: 10.1520/C1604_C1604M-05R19.
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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
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Standards volume information, refer to the standard’s Document Summary page on Available fromAmerican Concrete Institute (ACI), P.O. Box 9094, Farmington
the ASTM website. Hills, MI 48333-9094, http://www.concrete.org.
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