ASTM C1611/C1611M-05

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Designation:C1611/C1611M–05
Standard Test Method for
Slump Flow of Self-Consolidating Concrete
This standard is issued under the fixed designation C 1611/C 1611M; 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 3. Terminology
1.1 This test method covers the determination of slump flow 3.1 Definitions of Terms Specific to This Standard:
of self-consolidating concrete. 3.1.1 halo, n—an observed cement paste or mortar ring that
1.2 The values stated in either inch-pound units or SI units has clearly separated from the coarse aggregate, around the
are to be regarded separately as standard. Within the text, the outside circumference of concrete after flowing from the slump
SI units are shown in brackets. The values stated in each cone.
system are not exact equivalents; therefore, each system shall 3.1.2 spread, n—the distance of lateral flow of concrete
be used independently of the other. Combining values from the during the slump-flow test.
two systems may result in nonconformance with the standard. 3.1.3 stability, n—the ability of a concrete mixture to resist
1.3 This standard does not purport to address all of the segregation of the paste from the aggregates.
safety concerns, if any, associated with its use. It is the 3.1.4 viscosity, n—resistance of a material to flow under an
responsibility of the user of this standard to establish appro- applied shearing stress.
priate safety and health practices and determine the applica-
4. Summary of Test Method
bility of regulatory limitations prior to use. (WARNING -
4.1 A sample of freshly mixed concrete is placed in a mold
Fresh hydraulic cementitious mixtures are caustic and may
cause chemical burns to skin and tissue upon prolonged shaped as the frustum of a cone. The concrete is placed in one
lift without tamping or vibration. The mold is raised, and the
exposure. )
1.4 The text of this standard references notes and footnotes concrete allowed to spread. After spreading ceases, two diam-
eters of the concrete mass are measured in approximately
that provide explanatory material. These notes and footnotes
(excluding those in tables and figures) shall not be considered orthogonal directions, and slump flow is the average of the two
diameters.
as requirements of the standard.
5. Significance and Use
2. Referenced Documents
2.1 ASTM Standards: 5.1 This test method provides a procedure to determine the
slump flow of self-consolidating concrete in the laboratory or
C 143/C 143M Test Method for Slump of Hydraulic-
Cement Concrete the field.
5.2 This test method is used to monitor the consistency of
C 172 Practice for Sampling Freshly Mixed Concrete
C 173/C 173M Test Method for Air Content of Freshly fresh, unhardened self-consolidating concrete and its uncon-
fined flow potential.
Mixed Concrete by the Volumetric Method
C 670 Practice for Preparing Precision and Bias Statements 5.3 It is difficult to produce self-consolidating concrete that
is both flowable and nonsegregating using coarse aggregates
for Test Methods for Construction Materials
larger than 1 in. [25 mm]. Therefore, this test method is
considered applicable to self-consolidating concrete having
This test method is under the jurisdiction of ASTM Committee C09 on
coarse aggregate up to 1 in. [25 mm] in size. Appendix X1
Concrete and ConcreteAggregates and is the direct responsibility of Subcommittee
provides non-mandatory visual rating criteria that may be used
C09.47 on Self-Consolidating Concrete.
to classify the ability of a self-consolidating concrete mixture
Current edition approved September 15, 2005. Published September 2005
to resist segregation (stability).
Section on Safety Precautions, Manual of Aggregate and Concrete Testing,
Annual Book of ASTM Standards, Vol. 04.02.
5.4 The rate at which the concrete spreads is related to its
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
viscosity. Appendix X1 provides a non-mandatory procedure
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
that may be used to provide an indication of relative viscosity
Standards volume information, refer to the standard’s Document Summary page on
the ASTM website. of self-consolidating concrete mixtures.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.
C1611/C1611M–05
6. Apparatus vertically. Raise the mold a distance of 9 6 3 in. [225 6 75
mm] in 3 6 1 seconds by a steady upward lift with no lateral
6.1 Mold—The mold used in this test method shall conform
or torsional motion. Complete the entire test from start of the
to that described in Test Method C 143/C 143M.
filling through removal of the mold without interruption within
6.2 Base Plate—The base plate on which the mold rests
an elapsed time of 2 ⁄2 minutes.
shall be nonabsorbent, smooth, rigid, and have a minimum
8.4 Wait for the concrete to stop flowing and then measure
diameter of 36 in. [915 mm].
the largest diameter of the resulting circular spread of concrete
NOTE 1—Field experience and results from the round robin test
to the nearest ⁄4 in. [5 mm]. When a halo is observed in the
program have shown that base plates made from sealed/laminated
resulting circular spread of concrete, it shall be included as part
plywood, acrylic plastic, or steel are suitable for performing this test.
of the diameter of the concrete. Measure a second diameter of
6.3 Strike-off Bar—As described in Test Method C 173/
the circular spread at an angle approximately perpendicular to
C 173M.
the original measured diameter.
8.5 If the measurement of the two diameters differs by more
7. Sample
than 2 in. [50 mm], the test is invalid and shall be repeated.
7.1 The sample of concrete from which test specimens are
made shall be representative of the entire batch. It shall be
9. Calculation
obtained in accordance with Practice C 172.
9.1 Calculate the slump flow using Eq 1:
8. Procedure
Slump flow5~d 1 d !/2 (1)
1 2
8.1 The slump-flow test shall be performed on a flat, level,
where:
nonabsorbent surface such as a pre-moistened concrete floor or
d = the largest diameter of the circular spread of the
a base plate. The base plate shall be used in conditions where
concrete, and
a flat, level surface is not available, such as on a construction
d = the circular spread of the concrete at an angle approxi-
job site. When the base plate is used, position and shim the
mately perpendicular to d
base plate so that it is fully supported, flat, and level. When
9.2 Record the average of the two diameters to the nearest
performing the slump flow test for a given study or project, do
⁄2 in. (10 mm).
not change the base plate surface type for the duration of the
study or project.
10. Report
8.2 Filling the Mold: The user has the option of filling the
mold by following either Procedure A or Procedure B.
10.1 Report the use of filling procedure A or B.
8.2.1 Filling Procedure A (Upright Mold): Dampen and
10.2 Report the slump flow to the nearest ⁄2 in. [10 mm].
place the mold, with the larger opening of the mold facing
down, in the center of a flat, moistened base plate or concrete
11. Precision and Bias
surface. Firmly hold the mold in place during filling by the
11.1 Theprecisionofthistestmethodwasdeterminedbased
operator standing on the two foot pieces. From the sample of
on the results obtained from a round robin test program
concrete obtained in accordance with Section 7, immediately
conducted by members of theASTM C09.47 subcommittee on
fill the mold in one lift. Slightly overfill the concrete above the
January 9, 2003. The round robin test program consisted of
top of the mold.
usingsingleandmultipleoperatorsperforming3replicasofthe
8.2.2 Filling Procedure B (Inverted Mold): Dampen and
test using th
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