ASTM C1437-99
(Test Method)Standard Test Method for Flow of Hydraulic Cement Mortar
Standard Test Method for Flow of Hydraulic Cement Mortar
SCOPE
1.1 This test method covers the determination of flow of hydraulic cement mortars.
1.2 The values stated in SI units are to be regarded as the standard. Values in parentheses are for information only.
1.3 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 1437 – 99
Standard Test Method for
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Flow of Hydraulic Cement Mortar
This standard is issued under the fixed designation C 1437; 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 plane surface shall not depart from straightness by more than 1
mm (0.04 in.) (Note 1).
1.1 This test method covers the determination of flow of
4.5 Straightedge, made of steel, shall be at least 200 mm (8
hydraulic cement mortars.
in.) long and not less than 1.5 mm (0.06 in.) nor more than 3.5
1.2 The values stated in SI units are to be regarded as the
mm (0.14-in.) in thickness. Its edge shall not depart from a
standard. Values in parentheses are for information only.
plane surface by more than 1 mm (0.04-in.) (Note 1).
1.3 This standard does not purport to address all of the
safety concerns, if any, associated with its use. It is the
NOTE 1—The trowel specified in Test Method C 109 and the straight-
responsibility of the user of this standard to establish appro- edge specified in Test Method C 185 may be used for this purpose,
providing they comply with the planeness indicated.
priate safety and health practices and determine the applica-
bility of regulatory limitations prior to use.
5. Temperature and Humidity
2. Referenced Documents
5.1 The temperature of the air in the laboratory shall be
maintained between 20 and 28°C (68 and 82°F) and its relative
2.1 ASTM Standards:
humidity shall not be less than 50 %.
C 109 Test Method for Compressive Strength of Hydraulic
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Cement Mortars (Using 2-in. or 50-mm Cube Specimens)
6. Materials
C 185 Test Method for Air Content of Hydraulic Cement
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6.1 Hydraulic Cement Mortar—A mortar for which the
Mortar
determination of flow is specified or desired.
C 230 Specification for Flow Table for Use in Tests of
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Hydraulic Cement
7. Procedure
3. Significance and Use
7.1 Determination of Flow:
7.1.1 Carefully wipe the flow table clean and dry, and place
3.1 This test method is intended to be used to determine the
the flow mold at the center. Place a layer of mortar about 25
flow of hydraulic cement mortars, and of mortars containing
mm (1 in.) in thickness in the mold and tamp 20 times with the
cementitious materials other than hydraulic cements.
tamper. The tamping pressure shall be just sufficient to ensure
3.2 While flow is not usually included in hydraulic cement
uniform filling of the mold. Then fill the mold with mortar and
specifications, it is commonly used in standard tests that
tamp as specified for the first layer. Cut off the mortar to a plane
require the mortar to have a water content that provides a
surface flush with the top of the mold by drawing the
specified flow level.
straightedge or the edge of the trowel with a sawing motion
4. Apparatus
across the top of the mold. Wipe the table top clean and dry,
being especially careful to remove any water from around the
4.1 Flow Table, Flow Mold, Conforming to the require-
edge of the flow mold. Lift the mold away from the mortar 1
ments of Specification C 230.
min after completing the mixing operation. Immediately drop
4.2 Caliper, Conforming to the requirements of Specifica-
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the table through a height of 12.7 6 0.13 mm ( ⁄2 6 0.005 in.)
tion C 230. Alternatively, any outside-measuring caliper con-
25 times in 15 s, unless otherwise specified.
structed of corrosion-resistant material may be used, provided
7.1.2 If using the caliper specified in Specification C 230,
that it is incremented in millimetres and its maximum extent of
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measure the diameter of the mortar along the four lines scribed
measuring is at least 260 mm (10 ⁄4 in.).
in the table top, recording each diameter as the number of
4.3 Tamper, conforming to the requirements of Test Method
caliper divisions, estimated to one tenth of a division. If some
C 109.
other caliper is being used, measure the diameter of the mortar
4.4 Trowel, having a steel blade 100 to 150 mm (4 to 6 in.)
along the four lines scribed in the table top, recording each
in length, with straight edges. The edges when placed on a
diameter to the nearest millimetre.
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This test method is under the jurisdiction of ASTM Committee C-1 on Cement
8. Calculation
and is the direct responsibility of Subcommittee C01.22 on Workability.
Current edition Aug. 10, 1999. Published September 1999.
8.1 The flow is the resulting increase in average base
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Annual Book of ASTM Standards, Vol 04.01.
Copyright © ASTM, 100 Barr Harbor Drive, West Conshohocken, PA 19428-2959, United States.
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C 1437
diameter of the mortar mass, expressed as a percentage of the 9.
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