ASTM C873-04

Standard Test Method for Compressive Strength of Concrete Cylinders Cast in Place in Cylindrical Molds

SIGNIFICANCE AND USE
Cast-in-place cylinder strength relates to the strength of concrete in the structure due to the similarity of curing conditions since 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 constant relationship between the strength of cast-in-place cylinders and cores. 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  
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 5 to 12 in. [125 to 300 mm].
1.2 The values stated in either inch-pounds or SI units shall be regarded separately as standard. SI units are shown in brackets. The values stated may not be exact equivalents, therefore each system must be used independently of the other. Combining values of the two units may result in nonconformance.
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.)

General Information

• Status: Historical
• Publication Date: 31-May-2004
• 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 C873-99 - Standard Test Method for Compressive Strength of Concrete Cylinders Cast in Place in Cylindrical Molds
• Effective Date: 01-Jun-2004
• Replaced By: ASTM C873/C873M-04e1 - Standard Test Method for Compressive Strength of Concrete Cylinders Cast in Place in Cylindrical Molds
• Effective Date: 01-Jun-2004

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
Designation:C873–04
Standard Test Method for
Compressive Strength of Concrete Cylinders Cast in Place
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in Cylindrical Molds
This standard is issued under the fixed designation C 873; 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 617 Practice for Capping Cylindrical Concrete Speci-
mens
1.1 This test method covers the determination of strength of
C 670 Practice for Preparing Precision and Bias Statements
cylindrical concrete specimens that have been molded in place
for Test Methods for Construction Materials
using special molds attached to formwork. This test method is
limited to use in slabs where the depth of concrete is from 5 to
3. Summary of Test Method
12 in. [125 to 300 mm].
3.1 Aconcrete cylinder mold assembly consisting of a mold
1.2 The values stated in either inch-pounds or SI units shall
and a tubular support member is fastened within the concrete
be regarded separately as standard. SI units are shown in
formwork prior to placement of the concrete as shown in Fig.
brackets. The values stated may not be exact equivalents,
1. The elevation of the mold upper edge is adjusted to
therefore each system must be used independently of the other.
correspond to the plane of the finished slab surface. The mold
Combining values of the two units may result in nonconfor-
support prevents direct contact of the slab concrete with the
mance.
outside of the mold and permits its easy removal from the
1.3 This standard does not purport to address all of the
hardened concrete. The mold is filled at the time its location is
safety concerns, if any, associated with its use. It is the
reached in the normal course of concrete placement. The
responsibility of the user of this standard to consult and
specimen in the “cured-in-place” condition is removed from its
establish appropriate safety and health practices and deter-
in-place location immediately prior to de-molding, capping,
mine the applicability of regulatory limitations prior to use.
and testing. The reported compressive strength is corrected on
(Warning—Fresh hydraulic cementitious mixtures are caustic
the basis of specimen length-diameter ratio using correction
and may cause chemical burns to skin and tissue upon
2 factors provided in the section on calculation of Test Method
prolonged exposure. )
C 42/C 42M.
2. Referenced Documents
4. Significance and Use
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2.1 ASTM Standards:
4.1 Cast-in-place cylinder strength relates to the strength of
C 39/C 39M Test Method for Compressive Strength of Cy-
concrete in the structure due to the similarity of curing
lindrical Concrete Specimens
conditionssincethecylinderiscuredwithintheslab.However,
C 42/C 42M Test Method for Obtaining and Testing Drilled
due to differences in moisture condition, degree of consolida-
Cores and Sawed Beams of Concrete
tion, specimen size, and length-diameter ratio, there is not a
C 470/C 470M Specification for Molds for Forming Con-
constant relationship between the strength of cast-in-place
crete Test Cylinders Vertically
cylinders and cores. When cores can be drilled undamaged and
tested in the same moisture condition as the cast-in-place
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cylinders,thestrengthofthecylinderscanbeexpectedtobeon
This test method is under the jurisdiction of ASTM Committee C09 on
Concrete and ConcreteAggregates, and is the direct responsibility of Subcommittee average 10 % higher than the cores at ages up to 91 days for
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C09.61 on Testing for Strength.
specimens of the same size and length-diameter ratio.
CurrenteditionapprovedJune1,2004.PublishedJuly2004.Originallyapproved
4.2 Strength of cast-in-place cylinders may be used for
in 1977. Last previous edition approved in 1999 as C 873 – 99.
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various purposes, such as estimating the load-bearing capacity
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 [e-mail]. 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 International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.
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