ASTM C187-23

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Designation: C187 − 16 C187 − 23 American Association State
Highway and Transportation Officials Standard
AASHTO No.: T 129
Standard Test Method for
Amount of Water Required for Normal Consistency of
Hydraulic Cement Paste
This standard is issued under the fixed designation C187; 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 the normal consistency of hydraulic cement.
1.2 Units—The values stated in SI units are to be regarded as standard. No other units of measurement are included in this
standard.
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 healthsafety, health, and environmental practices and determine the
applicability of regulatory limitations prior to use. See 1.4 for a specific warning statement.
1.4 Warning—Fresh hydraulic cementitious mixtures are caustic and may cause chemical burns to skin and tissue upon prolonged
exposure. The use of gloves, protective clothing, and eye protection is recommended. Wash contact area with copious amounts of
water after contact. Wash eyes for a minimum of 15 min. Avoid exposure of the body to clothing saturated with the liquid phase
of the unhardened material. Remove contaminated clothing immediately after exposure.
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:
C219 Terminology Relating to Hydraulic and Other Inorganic Cements
C305 Practice for Mechanical Mixing of Hydraulic Cement Pastes and Mortars of Plastic Consistency
C511 Specification for Mixing Rooms, Moist Cabinets, Moist Rooms, and Water Storage Tanks Used in the Testing of Hydraulic
Cements and Concretes
C1005 Specification for Reference Masses and Devices for Determining Mass and Volume for Use in Physical Testing of
Hydraulic Cements
D1193 Specification for Reagent Water
E177 Practice for Use of the Terms Precision and Bias in ASTM Test Methods
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 approved Dec. 1, 2016June 15, 2023. Published December 2016July 2023. Originally approved in 1944. Last previous edition approved in 20112016 as
ε1
C187 – 11C187 – 16. . DOI: 10.1520/C0187-16.10.1520/C0187-23.
Section See the section on Safety, Manual of Cement Testing, Annual Book of ASTM Standards, Vol 04.01.
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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C187 − 23
3. Terminology
3.1 Normal consistency is defined in Terminology standard C219.
4. Significance and Use
4.1 This test method is intended to be used to determine the amount of water required to prepare hydraulic cement pastes with
normal consistency, as required for certain standard tests.
5. Apparatus
5.1 Reference Masses and Devices for Determining Mass, conforming to the requirements of Specification C1005. The devices
for determining mass shall be evaluated for precision and bias at a total load of 1000 g.
5.2 Glass Graduates, 200 or 250-mL200 mL or 250 mL capacity, and conforming to the requirements of Specification C1005.
5.3 Vicat Apparatus—The Vicat apparatus shall consist of a frame A (Fig. 1) bearing a movable rod B, weighing 300 g, one end
C, the plunger end, being 10 mm in diameter for a distance of at least 50 mm, and the other end having a removable needle D,
1 mm in diameter and 50 mm in length. The rod B is reversible, and can be held in any desired position by a set screw E, and
has an adjustable indicator F, which moves over a scale (graduated in millimetres) attached to the frame A. The paste is held in
a rigid conical ring G, resting on a plane nonabsorptive square base plate H, about 100 mm on each side. The rod B shall be made
of stainless steel having a hardness of not less than 35 HRC (See HRC, Note 1), and shall be straight with the plunger end which
is perpendicular to the rod axis. The ring shall be made of a noncorroding, nonabsorbent material, and shall have an inside diameter
of 70 mm at the base and 60 mm at the top, and a height of 40 mm. In addition to the above, the Vicat apparatus shall conform
to the following requirements:
Weight of movable rod 300 ± 0.5 g
Diameter of plunger end of rod 10 ± 0.05 mm
Diameter of needle 1 ± 0.05 mm
Inside diameter of ring at bottom 70 ± 3 mm
Inside diameter of ring at top 60 ± 3 mm
Height of ring 40 ± 1 mm
Graduated scale The graduated scale, when compared
with a standard scale accurate to within
0.1 mm at all points, shall not show a
deviation at any point greater than 0.25
mm.
FIG. 1 Vicat Apparatus
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