ASTM C1362-97
(Test Method)Standard Test Method for Flow of Freshly Mixed Hydraulic Cement Concrete
Standard Test Method for Flow of Freshly Mixed Hydraulic Cement Concrete
SCOPE
1.1 This test method covers determination of the flow of a sample of freshly mixed concrete, either in the field or in the laboratory.
1.2 This test method is applicable to concrete having course aggregate up to 37.5 mm in size. If the coarse aggregate is larger than 37.5 mm in size, the test method is applicable when the fraction of concrete larger than 37.5 mm is removed in accordance with Practice C 172.
1.3 The values stated in SI units are 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.
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Designation: C 1362 – 97
Standard Test Method for
Flow of Freshly Mixed Hydraulic Cement Concrete
This standard is issued under the fixed designation C 1362; 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 change in flow and consistency with time of concrete contain-
ing superplasticizer admixtures.
1.1 This test method covers determination of the flow of a
4.3 This test method can be used to measure the uniformity
sample of freshly mixed concrete, either in the field or in the
characteristics of flow and consistency of freshly mixed
laboratory.
concrete and its change with time.
1.2 This test method is applicable to concrete having coarse
aggregate up to 37.5 mm in size. If the coarse aggregate is
NOTE 1—This test method may not be appropriate for use in evaluating
larger than 37.5 mm in size, the test method is applicable when gap-graded aggregate concrete.
the fraction of concrete larger than 37.5 mm is removed in
5. Apparatus
accordance with Practice C 172.
1.3 The values stated in SI units are the standard. 5.1 Details of the apparatus are shown in Fig. 1. The
apparatus consists of (1) measuring rod, (2) scale datum, (3)
1.4 This standard does not purport to address all of the
safety concerns, if any, associated with its use. It is the hollow tube with round holes and longitudinal slots, (4)
holding pin, (5) collar floater, and (6) tube point.
responsibility of the user of this standard to establish appro-
priate safety and health practices and determine the applica- 5.2 Measuring rod is a hollow tube, 13 mm in outside
diameter, 336 mm long with a wall thickness of 1.5 mm and it
bility of regulatory limitations prior to use.
is capped at both ends with a cap 15 mm in outside diameter.
2. Referenced Documents
A scale datum is 45 mm in outside diameter and 25 mm wide
2.1 ASTM Standards: and fabricated to fit hollow tube and accommodate measuring
C 172 Practice for Sampling Freshly Mixed Concrete rod. Hollow tube has an outside diameter of 33 mm, and it is
C 670 Practice for Preparing Precision and Bias Statements 310 mm long with a wall thickness of 4 mm and has 16 round
for Test Methods for Construction Materials holes, 9.4 mm in diameter, and 4 longitudinal slots, 9.4 mm
wide by 50 mm long, which are distributed around the
3. Summary of Test Method
circumference of the tube as shown in Fig. 1. A pin which is a
3.1 A flow apparatus comprising an outer partially perfo- rivet, 3.2 mm in diameter, protrudes 3.2 mm inside tube. Collar
rated hollow tube and an inner calibrated floating rod is
floater, made of a plate 5 mm thick, has an outside diameter of
inserted into a sample of freshly mixed concrete to a preset 90 mm and inside diameter of 33 mm, is connected to hollow
level and held in place by a collar floater. A portion of the
tube. Tube point is machined from a rod stock and fashioned
concrete is allowed to flow into the hollow tube through its into a conical shape. It is secured to the bottom end of hollow
perforations for a period of 40 s. The inner floating rod is then
tube, and it is used to facilitate the insertion of the assembly
lowered onto the concrete surface that has penetrated the into the fresh concrete. All individual dimensions shall have a
hollow tube. The height of the concrete in the hollow tube is
tolerance of 61 % of their value. Make all parts of the
read from the scale on the upper portion of the floating rod apparatus of non-corrosive materials that are not affected by
protruding from the top of the hollow tube. With increasing
chemicals found in the fresh concrete.
fluidity of the concrete a higher flow reading is obtained on a
6. Sampling
scale from zero to one hundred divisions.
6.1 Determine the flow either as the concrete is placed in the
4. Significance and Use
forms prior to any manipulation or in a suitable container such
4.1 This test method permits a rapid assessment of the flow as a can, a hopper, a pail, or a wheelbarrow. The sample of
and consistency of freshly mixed concrete (see Note 1).
concrete from which determin
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