ASTM C143/C143M-12

NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.
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Designation: C143/C143M − 12
StandardTest Method for
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Slump of Hydraulic-Cement Concrete
This standard is issued under the fixed designation C143/C143M; 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* C173/C173M Test Method forAir Content of Freshly Mixed
Concrete by the Volumetric Method
1.1 This test method covers determination of slump of
C231 Test Method for Air Content of Freshly Mixed Con-
hydraulic-cement concrete, both in the laboratory and in the
crete by the Pressure Method
field.
C670 Practice for Preparing Precision and Bias Statements
1.2 The values stated in either SI units or inch-pound units
for Test Methods for Construction Materials
are to be regarded separately as standard. Within the text, the
D638 Test Method for Tensile Properties of Plastics
SI units are shown in brackets. The values stated in each
system may not be exact equivalents; therefore, each system
3. Summary of Test Method
shall be used independently of the other. Combining values
3.1 A sample of freshly mixed concrete is placed and
from the two systems may result in non-conformance with the
compacted by rodding in a mold shaped as the frustum of a
standard.
cone. The mold is raised, and the concrete allowed to subside.
1.3 The text of this standard references notes and footnotes
The vertical distance between the original and displaced
which provide explanatory material. These notes and footnotes
position of the center of the top surface of the concrete is
(excluding those in tables and figures) shall not be considered
measured and reported as the slump of the concrete.
as requirements of the standard.
1.4 This standard does not purport to address all of the
4. Significance and Use
safety concerns, if any, associated with its use. It is the
4.1 This test method is intended to provide the user with a
responsibility of the user of this standard to establish appro-
procedure to determine slump of plastic hydraulic-cement
priate safety and health practices and determine the applica-
concretes.
bility of regulatory limitations prior to use. (Warning—Fresh
hydraulic cementitious mixtures are caustic and may cause
NOTE 1—This test method was originally developed to provide a
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chemical burns to skin and tissue upon prolonged exposure. ) technique to monitor the consistency of unhardened concrete. Under
laboratory conditions, with strict control of all concrete materials, the
slump is generally found to increase proportionally with the water content
2. Referenced Documents
of a given concrete mixture, and thus to be inversely related to concrete
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2.1 ASTM Standards:
strength. Under field conditions, however, such a strength relationship is
not clearly and consistently shown. Care should therefore be taken in
C31/C31M Practice for Making and Curing Concrete Test
relating slump results obtained under field conditions to strength.
Specimens in the Field
C138/C138M Test Method for Density (Unit Weight),Yield,
4.2 This test method is considered applicable to plastic
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and Air Content (Gravimetric) of Concrete ⁄2 in. [37.5 mm] in
concrete having coarse aggregate up to 1
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C172 Practice for Sampling Freshly Mixed Concrete
size. If the coarse aggregate is larger than 1 ⁄2 in. [37.5 mm] in
size, the test method is applicable when it is performed on the
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fractionofconcretepassinga1 ⁄2-in.[37.5-mm]sieve,withthe
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This test method is under the jurisdiction of ASTM Committee C09 on
larger aggregate being removed in accordance with the section
Concrete and ConcreteAggregates and is the direct responsibility of Subcommittee
titled “Additional Procedure for Large Maximum Size Aggre-
C09.60 on Testing Fresh Concrete.
gate Concrete” in Practice C172.
Current edition approved Nov. 1, 2012. Published November 2012. Originally
approved in 1922. Last previous edition approved in 2010 as C143/C143M–10a
4.3 This test method is not considered applicable to non-
DOI: 10.1520/C0143_C0143M-12
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plastic and non-cohesive concrete.
Section on Safety Precautions, Manual of Aggregate and Concrete Testing,
Annual Book of ASTM Standards, Vol. 04.02.
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NOTE 2—Concretes having slumps less than ⁄2 in. [15 mm] may not be
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
adequately plastic and concretes having slumps greater than about 9 in.
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 [230 mm] may not be adequately cohesive for this test
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