ASTM C1437-20

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Designation: C1437 − 15 C1437 − 20
Standard Test Method for
Flow of Hydraulic Cement Mortar
This standard is issued under the fixed designation C1437; 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 the determination of flow of hydraulic cement mortars.
1.2 The values stated in SI units are to be regarded as the standard. No other units of measurement are included in this standard.
When combined standards are cited, the selection of the measurement systems is at the user’s discretion subject to the requirements
of the referenced standard.
1.3 The text of this standard refers to notes and footnotes that provide explanatory material. These notes and footnotes (excluding
those in tables and figures) shall not be considered as requirements of this 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 safety, health, and healthenvironmental practices and determine the
applicability of regulatory limitations prior to use.
1.5 This international standard was developed in accordance with internationally recognized principles on standardization
established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued
by the World Trade Organization Technical Barriers to Trade (TBT) Committee.
2. Referenced Documents
2.1 ASTM Standards:
C109/C109M Test Method for Compressive Strength of Hydraulic Cement Mortars (Using 2-in. or [50 mm] Cube Specimens)
C185C219 Test Method for Air Content of Hydraulic Cement MortarTerminology Relating to Hydraulic and Other Inorganic
Cements
C230/C230M Specification for Flow Table for Use in Tests of Hydraulic Cement
C511 Specification for Mixing Rooms, Moist Cabinets, Moist Rooms, and Water Storage Tanks Used in the Testing of Hydraulic
Cements and Concretes
3. Terminology
3.1 Definitions:
3.1.1 For definitions of terms used in this test method, refer to Terminology C219.
This test method is under the jurisdiction of ASTM Committee C01 on Cement and is the direct responsibility of Subcommittee C01.22 on Workability.
Current edition Dec. 1, 2015Oct. 1, 2020. Published December 2015October 2020. Originally approved in 1999. Last previous edition approved in 20132015 as
C1437 – 13.C1437 – 15. DOI: 10.1520/C1437-15.10.1520/C1437-20.
For referenced ASTM standards, visit the ASTM website, www.astm.org, or contact ASTM Customer Service at service@astm.org. 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
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C1437 − 20
4. Significance and Use
4.1 This test method is intended to be used to determine the flow of hydraulic cement mortars, and of mortars containing
cementitious materials other than hydraulic cements.
4.2 While flow is not usually included in hydraulic cement specifications, it is commonly used in standard tests that require the
mortar to have a water content that provides a specified flow level.
5. Apparatus
5.1 Flow Table, Flow Mold, Conformingconforming to the requirements of Specification C230/C230M.
5.2 Caliper, Conformingconforming to the requirements of Specification C230/C230M. Alternatively, any outside-measuring
caliper constructed of corrosion-resistant material may be used, provided that it is incremented in millimetres and its maximum
extent of measuring is at least 260 mm.
5.3 Tamper, conforming to the requirements of Test Method C109/C109M.
5.4 Trowel, having a steel blade 100 to 150 mm in length, with straight edges. The edges when placed on a plane surface shall
not depart from straightness by more than 1 mm.
5.5 Straightedge, made of steel, shall be at least 200 mm long and not less than 1.5 mm nor more than 3.5 mm in thickness. Its
edge shall not depart from a plane surface by more than 1 mm.
6. Temperature and Humidity
6.1 The temperature and relative humidity of the air in the mixing room shall be as prescribed in Specification C511.
7. Materials
7.1 Hydraulic Cement Mortar—A mortar for which the determination of flow is specified or desired.
8. Procedure
8.1 Determination of Flow:
8.1.1 Carefully wipe the flow table cl
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