ASTM C143/C143M-20

Standard Test Method for Slump of Hydraulic-Cement Concrete

SIGNIFICANCE AND USE
4.1 This test method is intended to provide the user with a procedure to determine slump of plastic hydraulic-cement concretes.  
Note 1: This test method was originally developed to provide a 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 of a given concrete mixture, and thus to be inversely related to concrete strength. Under field conditions, however, such a strength relationship is not clearly and consistently shown. Care should therefore be taken in relating slump results obtained under field conditions to strength.  
4.2 This test method is considered applicable to plastic concrete having coarse aggregate up to 11/2 in. [37.5 mm] in size. If the coarse aggregate is larger than 11/2 in. [37.5 mm] in size, the test method is applicable when it is performed on the fraction of concrete passing a 11/2-in. [37.5-mm] sieve, with the larger aggregate being removed in accordance with the section titled “Additional Procedure for Large Maximum Size Aggregate Concrete” in Practice C172/C172M.  
4.3 This test method is not considered applicable to non-plastic and non-cohesive concrete.
Note 2: Concretes having slumps less than 1/2 in. [15 mm] may not be adequately plastic and concretes having slumps greater than about 9 in. [230 mm] may not be adequately cohesive for this test to have significance. Caution should be exercised in interpreting such results.
SCOPE
1.1 This test method covers determination of slump of hydraulic-cement concrete, both in the laboratory and in the field.  
1.2 The values stated in either SI units or inch-pound units are to be regarded separately as standard. Within the text, the SI units are shown in brackets. The values stated in each system are not necessarily exact equivalents; therefore, to ensure conformance with the standard, each system shall be used independently of the other, and values from the two systems shall not be combined.  
1.3 The text of this standard refers to notes and footnotes that provide explanatory material. These notes and footnotes (excluding those in tables and figures) shall not be considered as requirements of this standard.  
1.4 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, health, and environmental 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)  
1.5 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.

General Information

• Status: Published
• Publication Date: 31-May-2020
• ICS: 91.100.30 - Concrete and concrete products
• Technical Committee: C09 - Concrete and Concrete Aggregates
• Drafting Committee: C09.60 - Testing Fresh Concrete

Standards Content (Sample)

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: C143/C143M − 20
Standard Test Method for
1
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* 2. Referenced Documents
3
1.1 This test method covers determination of slump of 2.1 ASTM Standards:
hydraulic-cement concrete, both in the laboratory and in the C31/C31M Practice for Making and Curing Concrete Test
field. Specimens in the Field
C138/C138M Test Method for Density (Unit Weight),Yield,
1.2 The values stated in either SI units or inch-pound units
and Air Content (Gravimetric) of Concrete
are to be regarded separately as standard. Within the text, the
C172/C172M Practice for Sampling Freshly Mixed Con-
SI units are shown in brackets. The values stated in each
crete
system are not necessarily exact equivalents; therefore, to
C173/C173M Test Method forAir Content of Freshly Mixed
ensure conformance with the standard, each system shall be
Concrete by the Volumetric Method
used independently of the other, and values from the two
C231/C231M Test Method forAir Content of Freshly Mixed
systems shall not be combined.
Concrete by the Pressure Method
1.3 The text of this standard refers to notes and footnotes
C670 Practice for Preparing Precision and Bias Statements
that provide explanatory material. These notes and footnotes
for Test Methods for Construction Materials
(excluding those in tables and figures) shall not be considered
D638 Test Method for Tensile Properties of Plastics
as requirements of this standard.
3. Summary of Test Method
1.4 This standard does not purport to address all of the
safety concerns, if any, associated with its use. It is the
3.1 A sample of freshly mixed concrete is placed and
responsibility of the user of this standard to establish appro-
compacted by rodding in a mold shaped as the frustum of a
priate safety, health, and environmental practices and deter-
cone. The mold is raised, and the concrete allowed to subside.
mine the applicability of regulatory limitations prior to use.
The vertical distance between the original and displaced
(Warning—Fresh hydraulic cementitious mixtures are caustic
position of the center of the top surface of the concrete is
and may cause chemical burns to skin and tissue upon
measured and reported as the slump of the concrete.
2
prolonged exposure. )
4. Significance and Use
1.5 This international standard was developed in accor-
dance with internationally recognized principles on standard-
4.1 This test method is intended to provide the user with a
ization established in the Decision on Principles for the
procedure to determine slump of plastic hydraulic-cement
Development of International Standards, Guides and Recom-
concretes.
mendations issued by the World Trade Organization Technical
NOTE 1—This test method was originally developed to provide a
Barriers to Trade (TBT) Committee.
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
1
of a given concrete mixture, and thus to be inversely related to concrete
This test method is under the jurisdiction of ASTM Committee C09 on
Concrete and ConcreteAggregates and is the direct responsibility of Subcommittee strength. Under field conditions, however, such a strength relationship is
C09.60 on Testing Fresh Concrete.
CurrenteditionapprovedJune1,2020.PublishedJuly2020.Originallyapproved
3
in 1922. Last previous edition approved in 2015 as C143/C143M – 15a. DOI: For referenced ASTM standards, visit the ASTM website, www.astm.org, or
10.1520/C0143_C0143M-20. contact ASTM Customer Service at [e-mail]. For Annual Book of ASTM
2
Section on Safety Precautions, Manual of Aggregate and Concrete Testing, Standards volume information, refer to the standard’s Document Summary page on
Annual Book of ASTM Standards, Vol 04.02. 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

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C143/C143M − 20
not clearly and consistently shown. Care should therefore be taken in
relating slump results ob
...

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: C143/C143M − 15a C143/C143M − 20
Standard Test Method for
1
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*
1.1 This test method covers determination of slump of hydraulic-cement concrete, both in the laboratory and in the field.
1.2 The values stated in either SI units or inch-pound units are to be regarded separately as standard. Within the text, the SI units
are shown in brackets. The values stated in each system mayare not benecessarily exact equivalents; therefore, to ensure
conformance with the standard, each system shall be used independently of the other. Combiningother, and values from the two
systems may result in non-conformance with the standard.shall not be combined.
1.3 The text of this standard references refers to notes and footnotes whichthat provide explanatory material. These notes and
footnotes (excluding those in tables and figures) shall not be considered as requirements of thethis standard.
1.4 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 safety, health, and healthenvironmental practices and determine the
applicability of regulatory limitations prior to use. (Warning—Fresh hydraulic cementitious mixtures are caustic and may cause
2
chemical burns to skin and tissue upon prolonged exposure. )
1.5 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
3
2.1 ASTM Standards:
C31/C31M Practice for Making and Curing Concrete Test Specimens in the Field
C138/C138M Test Method for Density (Unit Weight), Yield, and Air Content (Gravimetric) of Concrete
C172C172/C172M Practice for Sampling Freshly Mixed Concrete
C173/C173M Test Method for Air Content of Freshly Mixed Concrete by the Volumetric Method
C231C231/C231M Test Method for Air Content of Freshly Mixed Concrete by the Pressure Method
C670 Practice for Preparing Precision and Bias Statements for Test Methods for Construction Materials
D638 Test Method for Tensile Properties of Plastics
3. Summary of Test Method
3.1 A sample of freshly mixed concrete is placed and compacted by rodding in a mold shaped as the frustum of a cone. The
mold is raised, and the concrete allowed to subside. The vertical distance between the original and displaced position of the center
of the top surface of the concrete is measured and reported as the slump of the concrete.
4. Significance and Use
4.1 This test method is intended to provide the user with a procedure to determine slump of plastic hydraulic-cement concretes.
NOTE 1—This test method was originally developed to provide a technique to monitor the consistency of unhardened concrete. Under laboratory
1
This test method is under the jurisdiction of ASTM Committee C09 on Concrete and Concrete Aggregates and is the direct responsibility of Subcommittee C09.60 on
Testing Fresh Concrete.
Current edition approved Dec. 15, 2015June 1, 2020. Published February 2016July 2020. Originally approved in 1922. Last previous edition approved in 2015 as
C143/C143M – 15.C143/C143M – 15a. DOI: 10.1520/C0143_C0143M-15A10.1520/C0143_C0143M-20.
2
Section on Safety Precautions, Manual of Aggregate and Concrete Testing, Annual Book of ASTM Standards, Vol. 04.02.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 [e-mail]. For Annual Book of ASTM Standards
volume information, refer to the standard’sstandard’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

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