ASTM C873/C873M-15
(Test Method)Standard Test Method for Compressive Strength of Concrete Cylinders Cast in Place in Cylindrical Molds
Standard Test Method for Compressive Strength of Concrete Cylinders Cast in Place in Cylindrical Molds
ABSTRACT
This test method covers the determination of strength of cylindrical concrete specimens that have been molded in place using special molds attached to formwork. A concrete cylinder mold assembly consisting of a mold and a tubular support member is fastened within the concrete formwork prior to placement of the concrete. The elevation of the mold upper edge is adjusted to correspond to the plane of the finished slab surface. The mold support prevents direct contact of the slab concrete with the outside of the mold and permits its easy removal from the hardened concrete. Strength of cast-in-place cylinders may be used for various purposes, such as estimating the load-bearing capacity of slabs, determining the time of form and shore removal, and determining the effectiveness of curing and protection. Consolidation of concrete in the mold may be varied to simulate the conditions of placement. Internal vibration of concrete in the mold is prohibited except under special circumstances.
SIGNIFICANCE AND USE
4.1 Cast-in-place cylinder strength relates to the strength of concrete in the structure due to the similarity of curing conditions because the cylinder is cured within the slab. However, due to differences in moisture condition, degree of consolidation, specimen size, and length-diameter ratio, there is not a unique relationship between the strength of cast-in-place cylinders and cores of the same age. When cores can be drilled undamaged and tested in the same moisture condition as the cast-in-place cylinders, the strength of the cylinders can be expected to be on average 10 % higher than the cores at ages up to 91 days for specimens of the same size and length-diameter ratio.4
4.2 Strength of cast-in-place cylinders may be used for various purposes, such as estimating the load-bearing capacity of slabs, determining the time of form and shore removal, and determining the effectiveness of curing and protection.
SCOPE
1.1 This test method covers the determination of strength of cylindrical concrete specimens that have been molded in place using special molds attached to formwork. This test method is limited to use in slabs where the depth of concrete is from 125 to 300 mm [5 to 12 in.].
1.2 Units—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 consult and establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use. (Warning—Fresh hydraulic cementitious mixtures are caustic and may cause chemical burns to skin and tissue upon prolonged exposure.2)
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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: C873/C873M − 15
Standard Test Method for
Compressive Strength of Concrete Cylinders Cast in Place
1
in Cylindrical Molds
This standard is issued under the fixed designation C873/C873M; 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* C670 Practice for Preparing Precision and Bias Statements
for Test Methods for Construction Materials
1.1 This test method covers the determination of strength of
C1231/C1231M Practice for Use of Unbonded Caps in
cylindrical concrete specimens that have been molded in place
DeterminationofCompressiveStrengthofHardenedCon-
using special molds attached to formwork. This test method is
crete Cylinders
limited to use in slabs where the depth of concrete is from 125
to 300 mm [5 to 12 in.].
3. Summary of Test Method
1.2 Units—The values stated in either SI units or inch-
3.1 Aconcrete cylinder mold assembly consisting of a mold
pound units are to be regarded separately as standard. The
and a tubular support member is fastened within the concrete
values stated in each system may not be exact equivalents;
formwork prior to placement of the concrete as shown in Fig.
therefore,eachsystemshallbeusedindependentlyoftheother.
1. The elevation of the mold upper edge is adjusted to
Combining values from the two systems may result in non-
correspond to the level of the finished slab surface. The mold
conformance with the standard.
support prevents direct contact of the slab concrete with the
1.3 This standard does not purport to address all of the
outside of the mold and permits easy removal of the mold from
safety concerns, if any, associated with its use. It is the
the slab. The mold is filled at the time its location is reached in
responsibility of the user of this standard to consult and
the normal course of concrete placement. The specimen in the
establish appropriate safety and health practices and deter-
“cured-in-place” condition is removed from its in-place loca-
mine the applicability of regulatory limitations prior to use.
tion immediately prior to de-molding, capping, and testing.
(Warning—Fresh hydraulic cementitious mixtures are caustic
The reported compressive strength is corrected on the basis of
and may cause chemical burns to skin and tissue upon
specimen length-diameter ratio using correction factors pro-
2
prolonged exposure. )
vided in the section on calculation of Test Method C42/C42M.
2. Referenced Documents
4. Significance and Use
3
2.1 ASTM Standards:
4.1 Cast-in-place cylinder strength relates to the strength of
C39/C39M Test Method for Compressive Strength of Cylin-
concrete in the structure due to the similarity of curing
drical Concrete Specimens
conditions because the cylinder is cured within the slab.
C42/C42M Test Method for Obtaining and Testing Drilled
However, due to differences in moisture condition, degree of
Cores and Sawed Beams of Concrete
consolidation, specimen size, and length-diameter ratio, there
C470/C470M Specification for Molds for Forming Concrete
is not a unique relationship between the strength of cast-in-
Test Cylinders Vertically
place cylinders and cores of the same age. When cores can be
C617 Practice for Capping Cylindrical Concrete Specimens
drilledundamagedandtestedinthesamemoistureconditionas
the cast-in-place cylinders, the strength of the cylinders can be
expected to be on average 10 % higher than the cores at ages
1
This test method is under the jurisdiction of ASTM Committee C09 on
up to 91 days for specimens of the same size and length-
Concrete and Concrete Aggregatesand is the direct responsibility of Subcommittee
4
diameter ratio.
C09.61 on Testing for Strength.
Current edition approved Dec. 1, 2015. Published February 2016. Originally
4.2 Strength of cast-in-place cylinders may be used for
approved in 1977. Last previous edition approved in 2010 as C873/C873M–10a.
various purposes, such as estimating the load-bearing capacity
DOI: 10.1520/C0873_C0873M-15.
2
Section on Safety Precautions, Manual of Aggregate and Concrete Testing,
Annual Book of ASTM Standards, Vol 04.02.
3
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
4
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM Bloem, D. L., “Concrete Strength in Structures,” Journal of the American
Standards volume information, refer to the standard’s Document Summary page on Concrete Institute, JACIA, March 1968, or ACI Proceedings, PACIA, Vol. 65, No.
t
...
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: C873/C873M − 10a C873/C873M − 15
Standard Test Method for
Compressive Strength of Concrete Cylinders Cast in Place
1
in Cylindrical Molds
This standard is issued under the fixed designation C873/C873M; 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*
1.1 This test method covers the determination of strength of cylindrical concrete specimens that have been molded in place
using special molds attached to formwork. This test method is limited to use in slabs where the depth of concrete is from 125 to
300 mm [5 to 12 in.].
1.2 Units—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 consult and establish appropriate safety and health practices and determine the applicability of
regulatory limitations prior to use. (Warning—Fresh hydraulic cementitious mixtures are caustic and may cause chemical burns
2
to skin and tissue upon prolonged exposure. )
2. Referenced Documents
3
2.1 ASTM Standards:
C39/C39M Test Method for Compressive Strength of Cylindrical Concrete Specimens
C42/C42M Test Method for Obtaining and Testing Drilled Cores and Sawed Beams of Concrete
C470/C470M Specification for Molds for Forming Concrete Test Cylinders Vertically
C617 Practice for Capping Cylindrical Concrete Specimens
C670 Practice for Preparing Precision and Bias Statements for Test Methods for Construction Materials
C1231/C1231M Practice for Use of Unbonded Caps in Determination of Compressive Strength of Hardened Concrete Cylinders
3. Summary of Test Method
3.1 A concrete cylinder mold assembly consisting of a mold and a tubular support member is fastened within the concrete
formwork prior to placement of the concrete as shown in Fig. 1. The elevation of the mold upper edge is adjusted to correspond
to the level of the finished slab surface. The mold support prevents direct contact of the slab concrete with the outside of the mold
and permits easy removal of the mold from the slab. The mold is filled at the time its location is reached in the normal course of
concrete placement. The specimen in the “cured-in-place” condition is removed from its in-place location immediately prior to
de-molding, capping, and testing. The reported compressive strength is corrected on the basis of specimen length-diameter ratio
using correction factors provided in the section on calculation of Test Method C42/C42M.
4. Significance and Use
4.1 Cast-in-place cylinder strength relates to the strength of concrete in the structure due to the similarity of curing conditions
because the cylinder is cured within the slab. However, due to differences in moisture condition, degree of consolidation, specimen
size, and length-diameter ratio, there is not a unique relationship between the strength of cast-in-place cylinders and cores of the
1
This test method is under the jurisdiction of ASTM Committee C09 on Concrete and Concrete Aggregatesand is the direct responsibility of Subcommittee C09.61 on
Testing for Strength.
Current edition approved Dec. 15, 2010Dec. 1, 2015. Published January 2011February 2016. Originally approved in 1977. Last previous edition approved in 2010 as
C873/C873M–10.–10a. DOI: 10.1520/C0873_C0873M-10a.10.1520/C0873_C0873M-15.
2
Section on Safety Precautions, Manual of Aggregate and Concrete Testing, Annual Book of ASTM Standards, Vol 04.02.
3
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.
*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 ----------------------
C873/C873M − 15
FIG. 1 Schematic of Cast-in-Place Cylinder Mold Assembly
same age. When cores can be d
...
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: C873/C873M − 15
Standard Test Method for
Compressive Strength of Concrete Cylinders Cast in Place
1
in Cylindrical Molds
This standard is issued under the fixed designation C873/C873M; 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* C670 Practice for Preparing Precision and Bias Statements
for Test Methods for Construction Materials
1.1 This test method covers the determination of strength of
C1231/C1231M Practice for Use of Unbonded Caps in
cylindrical concrete specimens that have been molded in place
Determination of Compressive Strength of Hardened Con-
using special molds attached to formwork. This test method is
crete Cylinders
limited to use in slabs where the depth of concrete is from 125
to 300 mm [5 to 12 in.].
3. Summary of Test Method
1.2 Units—The values stated in either SI units or inch-
3.1 A concrete cylinder mold assembly consisting of a mold
pound units are to be regarded separately as standard. The
and a tubular support member is fastened within the concrete
values stated in each system may not be exact equivalents;
formwork prior to placement of the concrete as shown in Fig.
therefore, each system shall be used independently of the other.
1. The elevation of the mold upper edge is adjusted to
Combining values from the two systems may result in non-
correspond to the level of the finished slab surface. The mold
conformance with the standard.
support prevents direct contact of the slab concrete with the
1.3 This standard does not purport to address all of the
outside of the mold and permits easy removal of the mold from
safety concerns, if any, associated with its use. It is the
the slab. The mold is filled at the time its location is reached in
responsibility of the user of this standard to consult and
the normal course of concrete placement. The specimen in the
establish appropriate safety and health practices and deter-
“cured-in-place” condition is removed from its in-place loca-
mine the applicability of regulatory limitations prior to use.
tion immediately prior to de-molding, capping, and testing.
(Warning—Fresh hydraulic cementitious mixtures are caustic
The reported compressive strength is corrected on the basis of
and may cause chemical burns to skin and tissue upon
specimen length-diameter ratio using correction factors pro-
2
prolonged exposure. )
vided in the section on calculation of Test Method C42/C42M.
2. Referenced Documents
4. Significance and Use
3
2.1 ASTM Standards:
4.1 Cast-in-place cylinder strength relates to the strength of
C39/C39M Test Method for Compressive Strength of Cylin-
concrete in the structure due to the similarity of curing
drical Concrete Specimens
conditions because the cylinder is cured within the slab.
C42/C42M Test Method for Obtaining and Testing Drilled
However, due to differences in moisture condition, degree of
Cores and Sawed Beams of Concrete
consolidation, specimen size, and length-diameter ratio, there
C470/C470M Specification for Molds for Forming Concrete
is not a unique relationship between the strength of cast-in-
Test Cylinders Vertically
place cylinders and cores of the same age. When cores can be
C617 Practice for Capping Cylindrical Concrete Specimens
drilled undamaged and tested in the same moisture condition as
the cast-in-place cylinders, the strength of the cylinders can be
expected to be on average 10 % higher than the cores at ages
1
This test method is under the jurisdiction of ASTM Committee C09 on
up to 91 days for specimens of the same size and length-
Concrete and Concrete Aggregatesand is the direct responsibility of Subcommittee
4
diameter ratio.
C09.61 on Testing for Strength.
Current edition approved Dec. 1, 2015. Published February 2016. Originally
4.2 Strength of cast-in-place cylinders may be used for
approved in 1977. Last previous edition approved in 2010 as C873/C873M–10a.
various purposes, such as estimating the load-bearing capacity
DOI: 10.1520/C0873_C0873M-15.
2
Section on Safety Precautions, Manual of Aggregate and Concrete Testing,
Annual Book of ASTM Standards, Vol 04.02.
3
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
4
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM Bloem, D. L., “Concrete Strength in Structures,” Journal of the American
Standards volume information, refer to the standard’s Document Summary page on Concrete Institute, JACIA, March 1968, or ACI Proceedings, PACIA, Vol. 65, No.
the ASTM website. 3, pp. 169–248.
*A Summary of Changes section appears at the end of this standard
Copyright © ASTM Internation
...
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