ASTM C1621/C1621M-06

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 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.
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: 14-Feb-2006
• ICS: 91.100.30 - Concrete and concrete products
• Technical Committee: C09 - Concrete and Concrete Aggregates
• Drafting Committee: C09.47 - Self-Consolidating Concrete

Relations

• Replaced By: ASTM C1621/C1621M-08 - Standard Test Method for Passing Ability of Self-Consolidating Concrete by J-Ring
• Effective Date: 01-Jun-2008

Standards Content (Sample)

NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.
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Designation:C1621/C1621M–06
Standard Test Method for
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 (e) indicates an editorial change since the last revision or reapproval.
1. Scope Mixed Concrete by the Volumetric Method
C 1611/C 1611M Test Method for Slump Flow of Self-
1.1 This test method covers determination of the passing
Consolidating Concrete
ability of self-consolidating concrete by using the J-Ring in
combination with a slump cone mold. The test method is
3. Terminology
limitedtoconcretewithnominalmaximumsizeofaggregateof
3.1 Definitions:
1 in [25 mm].
3.1.1 For definitions of terms used in this test method, refer
1.2 The values stated in either inch-pounds or SI units are to
to Terminology C 125.
be regarded separately as standard. Within the text, the SI units
3.2 Definitions of Terms Specific to This Standard:
are shown in brackets.The values stated in each system are not
3.2.1 halo—an observed cement paste or mortar ring that
exact equivalents; therefore, each system shall be used inde-
has clearly separated from the coarse aggregate, around the
pendentlyoftheother.Combiningvaluesfromthetwosystems
outside circumference of concrete after flowing from the slump
may result in nonconformance with the standard.
cone.
1.3 The text of this standard references notes that provide
3.2.2 J-ring—an apparatus consisting of a rigid ring sup-
explanatory material. These notes (excluding those in tables
ported on sixteen ⁄8 in. [16 mm] diameter rods equally spaced
and figures) shall not be considered as requirements of the
on a 12 in. [300 mm] diameter circle 4 in. [100 mm] above a
standard.
flat surface as shown in Fig. 1.
1.4 This standard does not purport to address all of the
3.2.3 J-ring flow—the distance of lateral flow of concrete
safety concerns, if any, associated with its use. It is the
using the J-Ring in combination with a slump cone.
responsibility of the user of this standard to establish appro-
3.2.4 passing ability—the ability of self-consolidating con-
priate safety and health practices and determine the applica-
crete to flow under its own weight (without vibration) and fill
bility of regulatory limitations prior to use. (Warning—Fresh
completely all spaces within intricate formwork, containing
hydraulic cementitious mixtures are caustic and may cause
2 obstacles, such as reinforcement.
chemical burns to skin and tissue upon prolonged exposure.)
4. Summary of Test Method
2. Referenced Documents
3 4.1 Asample of freshly mixed concrete is placed in a slump
2.1 ASTM Standards:
mold (in the upright or inverted position) that is concentric
C 125 Terminology Relating to Concrete and Concrete
with the J-Ring (Fig. 2). The concrete is placed in one lift
Aggregates
without tamping or vibration. The mold is raised, and the
C 143/C 143M Test Method for Slump of Hydraulic-
concreteisallowedtopassthroughJ-Ringandsubside(Fig.3).
Cement Concrete
The diameters of the concrete, in two directions approximately
C 172 Practice for Sampling Freshly Mixed Concrete
perpendicular to each other, are measured and averaged to
C 173/C 173M Test Method for Air Content of Freshly
obtain the J-Ring flow. The test is repeated without the J-Ring
to obtain the slump flow. The difference between the slump
This test method is under the jurisdiction of ASTM Committee C09 on
flowandJ-Ringflowisanindicatorofthepassingabilityofthe
Concrete and ConcreteAggregates and is the direct responsibility of Subcommittee
concrete.
C09.47 on Self-Consolidating Concrete.
Current edition approved Feb. 15, 2006. Published March 2006.
5. Significance and Use
Section on Safety Precautions, Manual of Aggregate and Concrete Testing,
Annual Book of ASTM Standards, Vol. 04.02.
5.1 This test method provides a procedure to determine the
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
passing ability of self-consolidating concrete mixtures. The
contact ASTM Customer Service at [e-mail]. For Annual Book of ASTM
difference between the slump flow and J-Ring flow is an
Standards volume information, refer to the standard’s Document Summary page on
the ASTM website.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.
C1621/C1621M–06
FIG. 1
indication of the passing ability of the concrete. A difference foot pieces are removed when the test is performed with the
less than 1 in. [25 mm] indicates good passing ability and a
mold in the upright position (Procedure A).
difference greater than 2 in. [50 mm] indicates poor passing
6.3 Base Plate—Anonabsorbent, rigid plate having a diam-
ability. The orientation of the slump cone for the J-Ring test
eter of at least 36 in. [915 mm].
and for the slump flow test without the J-Ring shall be the
NOTE 1—Field experience has shown that base plates made from sealed
same.
or laminated plywood, rigid plastic, or steel are suitable for performing
5.2 This test method is applicable for laboratory use in
this test.
comparing the passing ability of different concrete mixtures. It
is also applicable in the field as a quality control test.
6.4 Strike Off Bar—As described in Test Method C 173/
C 173M.
6. Apparatus
6.5 Measuring Device—A ruler, metal roll-up measuring
6.1 J-Ring—The apparatus shall consist of a steel (or
tape, or similar rigid or semi-rigid length measuring instrument
equivalent nonabsorbent, rigid material) ring measuring 12 in.
marked in increments of ⁄4 in. [5 mm] or less.
[300 mm] in diameter at the center of the ring and 1 in. [25
mm] in thickness, and sixteen ⁄8 in. [16 mm] diameter smooth
7. Sample
steel rods spaced evenly around the ring measur
...