ASTM C1621/C1621M-08

Standard Test Method for Passing Ability of Self-Consolidating Concrete by J-Ring

SIGNIFICANCE AND USE
This test method provides a procedure to determine the passing ability of self-consolidating concrete mixtures. The difference between the slump flow and J-Ring flow is an indication of the passing ability of the concrete. A difference less than 1 in. [25 mm] indicates good passing ability and a difference greater than 2 in. [50 mm] indicates poor passing ability. The orientation of the slump cone for the J-Ring test and for the slump flow test without the J-Ring shall be the same.
This test method is applicable for laboratory use in comparing the passing ability of different concrete mixtures. It is also applicable in the field as a quality control test.
SCOPE
1.1 This test method covers determination of the passing ability of self-consolidating concrete by using the J-Ring in combination with a slump cone mold. The test method is limited to concrete with nominal maximum size of aggregate of up to 1 in [25 mm].
1.2 The values stated in either inch-pounds or SI 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 exact equivalents; therefore, each system shall be used independently of the other. Combining values from the two systems may result in nonconformance with the standard.
1.3 The text of this standard references notes that provide explanatory material. These notes (excluding those in tables and figures) shall not be considered as requirements of the 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 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-2008
• ICS: 91.100.30 - Concrete and concrete products
• Technical Committee: C09 - Concrete and Concrete Aggregates
• Drafting Committee: C09.47 - Self-Consolidating Concrete

Relations

• Replaces: ASTM C1621/C1621M-06 - Standard Test Method for Passing Ability of Self-Consolidating Concrete by J-Ring
• Effective Date: 01-Jun-2008
• Replaced By: ASTM C1621/C1621M-09 - Standard Test Method for Passing Ability of Self-Consolidating Concrete by J-Ring
• Effective Date: 01-May-2009

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:C1621/C1621M–08
Standard Test Method for
1
Passing Ability of Self-Consolidating Concrete by J-Ring
This standard is issued under the fixed designation C 1621/C 1621M; 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* C 173/C 173M Test Method for Air Content of Freshly
Mixed Concrete by the Volumetric Method
1.1 This test method covers determination of the passing
C 1611/C 1611M Test Method for Slump Flow of Self-
ability of self-consolidating concrete by using the J-Ring in
Consolidating Concrete
combination with a slump cone mold. The test method is
limitedtoconcretewithnominalmaximumsizeofaggregateof
3. Terminology
up to 1 in [25 mm].
3.1 Definitions:
1.2 The values stated in either inch-pounds or SI units are to
3.1.1 For definitions of terms used in this test method, refer
be regarded separately as standard. Within the text, the SI units
to Terminology C 125.
are shown in brackets.The values stated in each system are not
3.2 Definitions of Terms Specific to This Standard:
exact equivalents; therefore, each system shall be used inde-
3.2.1 halo—an observed cement paste or mortar ring that
pendentlyoftheother.Combiningvaluesfromthetwosystems
has clearly separated from the coarse aggregate, around the
may result in nonconformance with the standard.
outside circumference of concrete after flowing from the slump
1.3 The text of this standard references notes that provide
cone.
explanatory material. These notes (excluding those in tables
3.2.2 J-ring—an apparatus consisting of a rigid ring sup-
and figures) shall not be considered as requirements of the
5
ported on sixteen ⁄8 in. [16 mm] diameter rods equally spaced
standard.
on a 12 in. [300 mm] diameter circle 4 in. [100 mm] above a
1.4 This standard does not purport to address all of the
flat surface as shown in Fig. 1.
safety concerns, if any, associated with its use. It is the
3.2.3 J-ring flow—the distance of lateral flow of concrete
responsibility of the user of this standard to establish appro-
using the J-Ring in combination with a slump cone.
priate safety and health practices and determine the applica-
3.2.4 passing ability—the ability of self-consolidating con-
bility of regulatory limitations prior to use. (Warning—Fresh
crete to flow under its own weight (without vibration) and fill
hydraulic cementitious mixtures are caustic and may cause
2 completely all spaces within intricate formwork, containing
chemical burns to skin and tissue upon prolonged exposure.)
obstacles, such as reinforcement.
2. Referenced Documents
4. Summary of Test Method
3
2.1 ASTM Standards:
4.1 Asample of freshly mixed concrete is placed in a slump
C 125 Terminology Relating to Concrete and Concrete
mold (in the upright or inverted position) that is concentric
Aggregates
with the J-Ring (Fig. 2). The concrete is placed in one lift
C 143/C 143M Test Method for Slump of Hydraulic-
without tamping or vibration. The mold is raised, and the
Cement Concrete
concreteisallowedtopassthroughJ-Ringandsubside(Fig.3).
C 172 Practice for Sampling Freshly Mixed Concrete
The diameters of the concrete, in two directions approximately
perpendicular to each other, are measured and averaged to
1
obtain the J-Ring flow. The test is repeated without the J-Ring
This test method is under the jurisdiction of ASTM Committee C09 on
Concrete and ConcreteAggregates and is the direct responsibility of Subcommittee
to obtain the slump flow. The difference between the slump
C09.47 on Self-Consolidating Concrete.
flowandJ-Ringflowisanindicatorofthepassingabilityofthe
CurrenteditionapprovedJune1,2008.PublishedJuly2008.Originallyapproved
concrete.
in 2006. Last previous edition approved in 2006 as C 1621/C 1621M – 06.
2
Section on Safety Precautions, Manual of Aggregate and Concrete Testing,
5. Significance and Use
Annual Book of ASTM Standards, Vol. 04.02.
3
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
5.1 This test method provides a procedure to determine the
contact ASTM Customer Service at [e-mail]. For Annual Book of ASTM
passing ability of self-consolidating concrete mixtures. The
Standards volume information, refer to the standard’s Document Summary page on
the ASTM website. difference between the slump flow and J-Ring flow is an
*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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C1621/C1621M–08
FIG. 1 J-Ring Apparatus
indication of the passing ability of the concr
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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:C1621/C1621M–06 Designation:C1621/C1621M–08
Standard Test Method for
1
Passing Ability of Self-Consolidating Concrete by J-Ring
This standard is issued under the fixed designation C 1621/C 1621M; 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 determination of the passing ability of self-consolidating concrete by using the J-Ring in
combination with a slump cone mold. The test method is limited to concrete with nominal maximum size of aggregate of up to
1 in [25 mm].
1.2 The values stated in either inch-pounds or SI 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 exact equivalents; therefore, each system shall be used
independently of the other. Combining values from the two systems may result in nonconformance with the standard.
1.3 The text of this standard references notes that provide explanatory material. These notes (excluding those in tables and
figures) shall not be considered as requirements of the 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 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
2
tissue upon prolonged exposure.)
2. Referenced Documents
3
2.1 ASTM Standards:
C 125 Terminology Relating to Concrete and Concrete Aggregates
C 143/C 143M Test Method for Slump of Hydraulic-Cement Concrete
C 172 Practice for Sampling Freshly Mixed Concrete
C 173/C 173M Test Method for Air Content of Freshly Mixed Concrete by the Volumetric Method
C 1611/C 1611M Test Method for Slump Flow of Self-Consolidating Concrete
3. Terminology
3.1 Definitions:
3.1.1 For definitions of terms used in this test method, refer to Terminology C 125.
3.2 Definitions of Terms Specific to This Standard:
3.2.1 halo—an observed cement paste or mortar ring that has clearly separated from the coarse aggregate, around the outside
circumference of concrete after flowing from the slump cone.
5
3.2.2 J-ring—an apparatus consisting of a rigid ring supported on sixteen ⁄8 in. [16 mm] diameter rods equally spaced on a 12
in. [300 mm] diameter circle 4 in. [100 mm] above a flat surface as shown in Fig. 1.
3.2.3 J-ring flow—the distance of lateral flow of concrete using the J-Ring in combination with a slump cone.
3.2.4 passing ability—the ability of self-consolidating concrete to flow under its own weight (without vibration) and fill
completely all spaces within intricate formwork, containing obstacles, such as reinforcement.
4. Summary of Test Method
4.1 A sample of freshly mixed concrete is placed in a slump mold (in the upright or inverted position) that is concentric with
the J-Ring (Fig. 2). The concrete is placed in one lift without tamping or vibration. The mold is raised, and the concrete is allowed
to pass through J-Ring and subside (Fig. 3). The diameters of the concrete, in two directions approximately perpendicular to each
other, are measured and averaged to obtain the J-Ring flow. The test is repeated without the J-Ring to obtain the slump flow. The
1
This test method is under the jurisdiction of ASTM Committee C09 on Concrete and Concrete Aggregates and is the direct responsibility of Subcommittee C09.47 on
Self-Consolidating Concrete.
Current edition approved Feb. 15, 2006. Published March 2006.
Current edition approved June 1, 2008. Published July 2008. Originally approved in 2006. Last previous edition approved in 2006 as C 1621/C 1621M – 06.
2
Section on Safety Precautions, Manual of Aggregate and Concrete Testing, Annual Book of ASTM Standards, Vol. 04.02.
3
For referencedASTM standards, visit theASTM website, www.astm.org, or contactASTM Customer Service at [e-mail]. 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.
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