ASTM C174/C174M-17
(Test Method)Standard Test Method for Measuring Thickness of Concrete Elements Using Drilled Concrete Cores
Standard Test Method for Measuring Thickness of Concrete Elements Using Drilled Concrete Cores
SIGNIFICANCE AND USE
4.1 This test method is used to determine the compliance of concrete construction with design specifications and is commonly used in determining the thickness of pavements and other slab construction. This test method requires that at least one end of the core be a finished or formed surface.
SCOPE
1.1 This test method covers the determination of the thickness of a concrete pavement, slab, or structural element using drilling cores.
1.2 The values stated in either SI units or inch-pound units are to be regarded separately as standard. Within the text, the inch-pound units are shown in brackets. The values stated in each system are not exact equivalents; therefore, each system shall be used independently of the other.
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 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: C174/C174M − 17 American Association State
Highway and Transportation Officials Standard
AASHTO No.: T 148
Standard Test Method for
Measuring Thickness of Concrete Elements Using Drilled
1
Concrete Cores
This standard is issued under the fixed designation C174/C174M; 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.
3
1. Scope* 2.2 AASHTO Standards:
AASHTO T148 Method of Test for Measuring Length of
1.1 This test method covers the determination of the thick-
Drilled Concrete Cores
ness of a concrete pavement, slab, or structural element using
drilling cores.
3. Terminology
1.2 The values stated in either SI units or inch-pound units
3.1 Definitions:
are to be regarded separately as standard. Within the text, the
3.1.1 For definitions of terms used in this test method, refer
inch-pound units are shown in brackets. The values stated in
to Terminology C125.
each system are not exact equivalents; therefore, each system
4. Significance and Use
shall be used independently of the other.
1.3 This standard does not purport to address all of the 4.1 This test method is used to determine the compliance of
concrete construction with design specifications and is com-
safety concerns, if any, associated with its use. It is the
responsibility of the user of this standard to establish appro- monly used in determining the thickness of pavements and
other slab construction. This test method requires that at least
priate safety and health practices and determine the applica-
bility of regulatory limitations prior to use. one end of the core be a finished or formed surface.
1.4 This international standard was developed in accor-
5. Apparatus
dance with internationally recognized principles on standard-
5.1 The apparatus shall consist of a base plate with three
ization established in the Decision on Principles for the
posts to support the core in a vertical direction, and top plate or
Development of International Standards, Guides and Recom-
mendations issued by the World Trade Organization Technical other means of establishing a plane that is parallel to and a
measured distance from the plane defined by the supporting
Barriers to Trade (TBT) Committee.
posts. The apparatus includes a measuring rod as described in
2. Referenced Documents 5.5 or other means to determine the length of axial elements of
2
the core. While the details of the mechanical design are not
2.1 ASTM Standards:
prescribed, the apparatus shall conform to the requirements of
C42/C42M Test Method for Obtaining and Testing Drilled
5.2 – 5.6. An example of an apparatus is illustrated in Fig. 1.
Cores and Sawed Beams of Concrete
C125 Terminology Relating to Concrete and Concrete Ag- 5.2 The base of the apparatus shall be so designed that the
gregates
core will be held with its axis in a vertical position by three
C670 Practice for Preparing Precision and Bias Statements symmetrically placed supports bearing against the lower end of
for Test Methods for Construction Materials
the core. These supports shall be short posts or studs of
hardened steel, and the ends that bear against the surface of the
1
core shall be rounded to a radius of not less than 6 mm [ ⁄4 in.]
1
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This test method is under the jurisdiction of ASTM Committee C09 on and not more than 13 mm [ ⁄2 in.].
Concrete and ConcreteAggregates and is the direct responsibility of Subcommittee
5.3 The apparatus shall provide for the accommodation of
C09.61 on Testing for Strength.
CurrenteditionapprovedMay1,2017.PublishedJuly2017.Originallyapproved cores of different nominal lengths over a range of at least 100
in 1942. Last previous edition approved in 2016 as C174/C174M – 16. DOI:
to 250 mm [4 to 10 in.].
10.1520/C0174_C0174M-17.
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
3
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM Available from American Association of State Highway and Transportation
Standards volume information, refer to the standard’s Document Summary page on Officials (AASHTO), 444 N. Capitol St., NW, Suite 249, Washington, DC 20001,
the ASTM website. http://www.transportation.org.
*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
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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: C174/C174M − 16 C174/C174M − 17 American Association State
Highway and Transportation Officials Standard
AASHTO No.: T 148
Standard Test Method for
Measuring Thickness of Concrete Elements Using Drilled
1
Concrete Cores
This standard is issued under the fixed designation C174/C174M; 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 the determination of the thickness of a concrete pavement, slab, or structural element using drilling
cores.
1.2 The values stated in either SI units or inch-pound units are to be regarded separately as standard. Within the text, the
inch-pound units are shown in brackets. The values stated in each system are not exact equivalents; therefore, each system shall
be used independently of the other.
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 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
2
2.1 ASTM Standards:
C42/C42M Test Method for Obtaining and Testing Drilled Cores and Sawed Beams of Concrete
C125 Terminology Relating to Concrete and Concrete Aggregates
C670 Practice for Preparing Precision and Bias Statements for Test Methods for Construction Materials
3
2.2 AASHTO Standards:
AASHTO T148 Method of Test for Measuring Length of Drilled Concrete Cores
3. Terminology
3.1 Definitions:
3.1.1 For definitions of terms used in this test method, refer to Terminology C125.
4. Significance and Use
4.1 This test method is used to determine the compliance of concrete construction with design specifications and is commonly
used in determining the thickness of pavements and other slab construction. This test method requires that at least one end of the
core be a finished or formed surface.
5. Apparatus
5.1 The apparatus shall consist of a base plate with three posts to support the core in a vertical direction, and top plate or other
means of establishing a plane that is parallel to and a measured distance from the plane defined by the supporting posts. 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 C09.61 on
Testing for Strength.
Current edition approved June 1, 2016May 1, 2017. Published July 2016July 2017. Originally approved in 1942. Last previous edition approved in 20132016 as
C174/C174M – 13.C174/C174M – 16. DOI: 10.1520/C0174_C0174M-16.10.1520/C0174_C0174M-17.
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.
3
Available from American Association of State Highway and Transportation Officials (AASHTO), 444 N. Capitol St., NW, Suite 249, Washington, DC 20001,
http://www.transportation.org.
*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
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C174/C174M − 17
apparatus includes a measuring rod as described in 5.5 or other means to determine the length of axial elements of the core. While
the details of the mechanical design are not prescribed, the apparatus shall conform to the requirements of 5.2 – 5.6. An example
of an apparatus is illustrated in Fig. 1.
5.2 The base of the apparatus shall be so designed that the core will be held with its axis in a vertical position by three
symmetrically placed supports bearing against the lower end of the core. These supports shall be short posts or studs of hardened
1
steel, and the ends that bear against the surface of the c
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