ASTM C1874-20

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.
Designation: C1874 − 20
Standard Test Method for
Measuring Rheological Properties of Cementitious Materials
1
Using Coaxial Rotational Rheometer
This standard is issued under the fixed designation C1874; 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* C1738/C1738M Practice for High-Shear Mixing of Hydrau-
lic Cement Pastes
1.1 This test method is used to measure the rheological
C1749 GuideforMeasurementoftheRheologicalProperties
properties such as plastic viscosity and yield stress of cemen-
of Hydraulic Cementious Paste Using a Rotational Rhe-
titious materials with particles up to 1 mm in diameter.
ometer
1.2 The values stated in SI units are to be regarded as
standard. No other units of measurement are included in this
3. Terminology
standard.
3.1 Definitions:
1.3 This standard does not purport to address all of the
3.1.1 For definitions of terms used in this test method, refer
safety concerns, if any, associated with its use. It is the
to Terminology C125 and Terminology C219.
responsibility of the user of this standard to establish appro-
3.2 Definitions of Terms Specific to This Standard:
priate safety, health, and environmental practices and deter-
3.2.1 shear rate, n—the rate of change of the shear strain
mine the applicability of regulatory limitations prior to use.
with time.
1.4 This international standard was developed in accor- 3
3.2.1.1 Discussion—The shear strain (1) is the relative
dance with internationally recognized principles on standard-
in-plane displacement of two parallel layers in a material body
ization established in the Decision on Principles for the -1
divided by the separation distance, in units of s .
Development of International Standards, Guides and Recom-
3.2.2 shear stress, n—the component of stress that causes
mendations issued by the World Trade Organization Technical
successive parallel layers of a material body to move, in their
Barriers to Trade (TBT) Committee.
own planes (that is, plane of shear), relative to each other, in
units of Pa.
2. Referenced Documents
3.2.3 relative viscosity, n—the ratio between the viscosity of
2
2.1 ASTM Standards:
a material and the viscosity of a reference material as a
C125 Terminology Relating to Concrete and Concrete Ag-
function of shear rate, both viscosities measured using the
gregates
same rheometer and with the same procedure.
C219 Terminology Relating to Hydraulic and Other Inor-
ganic Cements
4. Summary of Test Method
C305 Practice for Mechanical Mixing of Hydraulic Cement
4.1 This method allows the measurement of the shear stress
Pastes and Mortars of Plastic Consistency
of cementitious paste or mortar, using a rotational rheometer
C1005 Specification for Reference Masses and Devices for
withvariousspindlegeometries.Theplasticviscosityandyield
Determining Mass and Volume for Use in the Physical
stress are determined per the Bingham model.
Testing of Hydraulic Cements
C1602/C1602M Specification for Mixing Water Used in the
4.2 As cementitious slurries are thixotropic, the shear his-
Production of Hydraulic Cement Concrete
tory has an impact on the rheological measurements; mixing
-1
the sample, for instance 200 s for 60 s, is needed to ensure
correct preparation of the sample, prior to the measurements.
1
This test method is under the jurisdiction ofASTM Committee C01 on Cement
4.3 This mixing procedure is followed by the measurements
and is the direct responsibility of Subcommittee C01.22 on Workability.
of the shear stress evolution as a function of the shear rate in
CurrenteditionapprovedJune1,2020.PublishedJuly2020.Originallyapproved
-1
the range of 0.1 to 50 s . Before the standardization of the
in 2019. Last previous edition approved in 2019 as C1874 – 19. DOI: 10.1520/
C1874-19.
2
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
3
Standards volume information, refer to the standard’s Document Summary page on The boldface numbers in parentheses refer to the list of references at the end of
the ASTM website. this standard.
*A Summary of Changes section appears at the end of this standard
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C1874 − 20
NOTE 2—The gap between the spindle and the container is calculated as
rheometer, the she
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