Standard Practice for<br> Capping Cylindrical Concrete Specimens

SIGNIFICANCE AND USE
This practice describes procedures for providing plane surfaces on the ends of freshly molded concrete cylinders, hardened cylinders, or drilled concrete cores when the end surfaces do not conform with the planeness and perpendicularity requirements of applicable standards. Practice C1231/C1231M describes alternative procedures using unbonded caps or pad caps.
SCOPE
1.1 This practice covers apparatus, materials, and procedures for capping freshly molded concrete cylinders with neat cement and hardened cylinders and drilled concrete cores with high-strength gypsum paste or sulfur mortar.  
1.2 The values stated in either SI units or inch-pound units are to be regarded separately as standard. 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. For specific precaution statements see 4.3.1 and 6.2.4.1.

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Publication Date
31-Jul-2011
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NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.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
Designation: C617/C617M − 11
StandardPractice for
1
Capping Cylindrical Concrete Specimens
This standard is issued under the fixed designation C617/C617M; 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 Department of Defense.
3
1. Scope* 2.2 ANSI Standard:
B46.1 Standard for Surface Texture (Surface, Roughness,
1.1 This practice covers apparatus, materials, and proce-
Waviness and Lay)
dures for capping freshly molded concrete cylinders with neat
cement and hardened cylinders and drilled concrete cores with
3. Significance and Use
high-strength gypsum paste or sulfur mortar.
3.1 This practice describes procedures for providing plane
1.2 The values stated in either SI units or inch-pound units
surfaces on the ends of freshly molded concrete cylinders,
are to be regarded separately as standard. The values stated in
hardened cylinders, or drilled concrete cores when the end
each system may not be exact equivalents; therefore, each
surfaces do not conform with the planeness and perpendicu-
system shall be used independently of the other. Combining
larity requirements of applicable standards. Practice C1231/
values from the two systems may result in non-conformance
C1231M describes alternative procedures using unbonded caps
with the standard.
or pad caps.
1.3 This standard does not purport to address all of the
safety concerns, if any, associated with its use. It is the
4. Capping Equipment
responsibility of the user of this standard to establish appro-
4.1 Capping Plates—Neat cement caps and high-strength
priate safety and health practices and determine the applica-
gypsum-pastecapsshallbeformedagainstaglassplateatleast
bility of regulatory limitations prior to use. For specific
1
6mm[ ⁄4 in.] thick, a machined metal plate at least 11 mm
precaution statements see 4.3.1 and 6.2.4.1.
[0.45 in.] thick, or a polished plate of granite or diabase at least
75 mm [3 in.] thick. Sulfur mortar caps shall be formed against
2. Referenced Documents
similar metal or stone plates except that the recessed area
2
2.1 ASTM Standards:
which receives molten sulfur shall not be deeper than 12 mm
1
C109/C109M Test Method for Compressive Strength of
[ ⁄2 in.]. In all cases, plates shall be at least 25 mm [1 in.]
Hydraulic Cement Mortars (Using 2-in. or [50-mm] Cube
greater in diameter than the test specimen and the working
Specimens)
surfaces shall not depart from a plane by more than 0.05 mm
C150 Specification for Portland Cement
[0.002 in.] in 150 mm [6 in.]. The surface roughness of newly
C472 Test Methods for Physical Testing of Gypsum, Gyp-
finished metal plates shall not exceed that set forth in Table 4
sum Plasters and Gypsum Concrete
ofAmerican National Standard B46.1, or 3.2 µm [125 µin.] for
C595 Specification for Blended Hydraulic Cements
any type of surface and direction of lay. The surface, when
C1231/C1231M Practice for Use of Unbonded Caps in
new, shall be free of gouges, grooves, or indentations beyond
DeterminationofCompressiveStrengthofHardenedCon-
those caused by the finishing operation. Metal plates that have
crete Cylinders
been in use shall be free of gouges, grooves, and indentations
2
greater than 0.25 mm [0.010 in.] deep or greater than 30 mm
2
[0.05 in. ] in surface area.
1
This practice is under the jurisdiction of ASTM Committee C09 on Concrete
NOTE 1—A Rockwell hardness of 48 HRC is suggested for capping
and ConcreteAggregatesand is the direct responsibility of Subcommittee C09.61 on
plates of devices used to form sulfur mortar caps.
Testing for Strength.
Current edition approved Aug. 1, 2011. Published September 2011. Originally 4.2 Alignment Devices—Suitablealignmentdevices,suchas
approved in 1968. Last previous edition approved in 2010 as C617–10. DOI:
guide bars or bull’s-eye levels, shall be used in conjunction
10.1520/C0617_C0617M-11.
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
3
Standards volume information, refer to the standard’s Document Summary page on Available from American National Standards Institute (ANSI), 25 W. 43rd St.,
the ASTM website. 4th Floor, New York, NY 10036, http://www.ansi.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

---------------------- Page: 1 ----------------------
C617/C617M − 11
with capping plates to ensure that no single cap will depart
from perpendicularity
...

This document is not anASTM standard and is intended only to provide the user of anASTM 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:C617–10 Designation: C617/C617M – 11
Standard Practice for
1
Capping Cylindrical Concrete Specimens
This standard is issued under the fixed designation C617/C617M; 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 Department of Defense.
1. Scope*
1.1 This practice covers apparatus, materials, and procedures for capping freshly molded concrete cylinders with neat cement
and hardened cylinders and drilled concrete cores with high-strength gypsum paste or sulfur mortar.
1.2The values stated in inch-pound units are to be regarded as standard. The values given in parentheses are mathematical
conversions to SI units that are provided for information only and are not considered standard.
1.2 The values stated in either SI units or inch-pound units are to be regarded separately as standard. 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. For specific precaution statements see 4.3.1 and 6.2.4.1.
2. Referenced Documents
2
2.1 ASTM Standards:
C109/C109M Test Method for Compressive Strength of Hydraulic Cement Mortars (Using 2-in. or [50-mm] Cube Specimens)
C150 Specification for Portland Cement
C472 Test Methods for Physical Testing of Gypsum, Gypsum Plasters and Gypsum Concrete
C595 Specification for Blended Hydraulic Cements
C1231/C1231M Practice for Use of Unbonded Caps in Determination of Compressive Strength of Hardened Concrete
Cylinders
3
2.2 ANSI Standard:
B46.1 Standard for Surface Texture (Surface, Roughness, Waviness and Lay)
3. Significance and Use
3.1 This practice describes procedures for providing plane surfaces on the ends of freshly molded concrete cylinders, hardened
cylinders, or drilled concrete cores when the end surfaces do not conform with the planeness and perpendicularity requirements
of applicable standards. Practice C1231/C1231M describes alternative procedures using unbonded caps or pad caps.
4. Capping Equipment
4.1 Capping Plates—Neat cement caps and high-strength gypsum-paste caps shall be formed against a glass plate at least in.
1
(6 mm)6 mm [ ⁄4 in.] thick, a machined metal plate at least 0.45 in. (11 mm)11 mm [0.45 in.] thick, or a polished plate of granite
ordiabaseatleast3in.(76mm)75mm[3in.]thick.Sulfurmortarcapsshallbeformedagainstsimilarmetalorstoneplatesexcept
1
that the recessed area which receives molten sulfur shall not be deeper than in. (12 mm).12 mm [ ⁄2 in.]. In all cases, plates shall
be at least 1 in. (25 mm)25 mm [1 in.] greater in diameter than the test specimen and the working surfaces shall not depart from
a plane by more than 0.002 in. (0.05 mm)0.05 mm [0.002 in.] in 6 in. (152 mm).150 mm [6 in.]. The surface roughness of newly
finished metal plates shall not exceed that set forth in Table 4 of American National Standard B46.1, or 125 µin. (3.2 µm)3.2 µm
[125 µin.] for any type of surface and direction of lay. The surface, when new, shall be free of gouges, grooves, or indentations
1
This practice is under the jurisdiction ofASTM Committee C09 on Concrete and ConcreteAggregates and is the direct responsibility of Subcommittee C09.61 onTesting
for Strength.
Current edition approved June 15, 2010. Published July 2010. Originally approved in 1968. Last previous edition approved in 2009 as C617–09a. DOI: 10.1520/C0617-10.
Current edition approved Aug. 1, 2011. Published September 2011. Originally approved in 1968. Last previous edition approved in 2010 as C617–10. DOI:
10.1520/C0617_C0617M-11.
2
For referencedASTM standards, visit theASTM website, www.astm.org, or contactASTM 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 National Standards Institute (ANSI), 25 W. 43rd St., 4th Floor, New York, NY 10036, http://www.ansi.org.
*A Summary of Changes
...

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