ASTM C266-20

Standard Test Method for Time of Setting of Hydraulic-Cement Paste by Gillmore Needles

SIGNIFICANCE AND USE
5.1 The purpose of this test method is to establish whether a cement complies with a specification limit on Gillmore time of setting.
SCOPE
1.1 This test method covers the determination of the time of setting of hydraulic-cement paste by means of the Gillmore needles.  
1.2 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard.  
1.3 The text of this standard references notes and footnotes which provide explanatory material. These notes and footnotes (excluding those in tables and figures) shall not be considered as requirements of 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, health, and environmental practices and determine the applicability of regulatory limitations prior to use. (Warning—Fresh hydraulic cementitious mixtures are caustic and may cause chemical burns to skin and tissue upon prolonged exposure.)2  
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.

General Information

• Status: Historical
• Publication Date: 30-Sep-2020
• ICS: 91.100.10 - Cement. Gypsum. Lime. Mortar
• Technical Committee: C01 - Cement
• Drafting Committee: C01.30 - Time of Set

Standards Content (Sample)

NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.
Contact ASTM International (www.astm.org) for the latest information
Designation: C266 − 20
Standard Test Method for
Time of Setting of Hydraulic-Cement Paste by Gillmore
1
Needles
This standard is issued under the fixed designation C266; 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* C183/C183M Practice for Sampling and the Amount of
Testing of Hydraulic Cement
1.1 This test method covers the determination of the time of
C187 Test Method for Amount of Water Required for Nor-
setting of hydraulic-cement paste by means of the Gillmore
mal Consistency of Hydraulic Cement Paste
needles.
C219 Terminology Relating to Hydraulic and Other Inor-
1.2 The values stated in SI units are to be regarded as
ganic Cements
standard. No other units of measurement are included in this
C305 Practice for Mechanical Mixing of Hydraulic Cement
standard.
Pastes and Mortars of Plastic Consistency
1.3 The text of this standard references notes and footnotes C511 Specification for Mixing Rooms, Moist Cabinets,
Moist Rooms, and Water Storage Tanks Used in the
which provide explanatory material. These notes and footnotes
(excluding those in tables and figures) shall not be considered Testing of Hydraulic Cements and Concretes
C670 Practice for Preparing Precision and Bias Statements
as requirements of the standard.
for Test Methods for Construction Materials
1.4 This standard does not purport to address all of the
C1005 Specification for Reference Masses and Devices for
safety concerns, if any, associated with its use. It is the
Determining Mass and Volume for Use in the Physical
responsibility of the user of this standard to establish appro-
Testing of Hydraulic Cements
priate safety, health, and environmental practices and deter-
D1193 Specification for Reagent Water
mine the applicability of regulatory limitations prior to use.
(Warning—Fresh hydraulic cementitious mixtures are caustic
3. Terminology
and may cause chemical burns to skin and tissue upon
2
prolonged exposure.)
3.1 Definitions:
1.5 This international standard was developed in accor-
3.1.1 For definitions of terms used in this test method, refer
dance with internationally recognized principles on standard-
to Terminology C219.
ization established in the Decision on Principles for the
Development of International Standards, Guides and Recom-
4. Summary of Test Method
mendations issued by the World Trade Organization Technical
4.1 Sufficient water is added to the cement that is being
Barriers to Trade (TBT) Committee.
tested to produce a paste of normal consistency.Aspecimen is
2. Referenced Documents molded from this paste and is tested for time of setting by
3 means of the Gillmore initial and final needles.The initial time
2.1 ASTM Standards:
of setting is the time elapsed between initial contact of cement
C151/C151M Test Method for Autoclave Expansion of Hy-
and water and the time when the Gillmore Initial needle does
draulic Cement
not leave a complete circular impression in the paste surface.
The final time of setting is the time elapsed between initial
1
This test method is under the jurisdiction ofASTM Committee C01 on Cement
contact of cement and water and the time when the Gillmore
and is the direct responsibility of Subcommittee C01.30 on Time of Set.
Final needle does not leave a complete circular impression in
Current edition approved Oct. 1, 2020. Published November 2020. Originally
approved in 1951. Last previous edition approved in 2018 as C266 – 18. DOI: the paste surface.
10.1520/C0266-20.
2
Section on Safety, Manual of Cement Testing, Annual Book of ASTM
5. Significance and Use
Standards, Vol 04.01.
3
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
5.1 The purpose of this test method is to establish whether
contact ASTM Customer Service at [e-mail]. For Annual Book of ASTM
a cement complies with a specification limit on Gillmore time
Standards volume information, refer to the standard’s Document Summary page on
the ASTM website. of setting.
*A Summary of Changes section appears at the end of this standard
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
1

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C266 − 20
6. Apparatus 9.3 Maintain the moist cabinet or moist room in accordance
with the requirements of Specification C511.
6.1 Flat Trowel, having a sharpened straight-edged steel
blade 100 to 150 mm in length. The edges when placed on a
10. Procedure
plane surface shall not depart from straightness by more than
10.1 PreparationofCementPaste—Obtainthecementpaste
1 mm.
used for determination of the time
...

This document is not an ASTM standard and is intended only to provide the user of an ASTM standard an indication of what changes have been made to the previous version. Because
it may not be technically possible to adequately depict all changes accurately, ASTM recommends that users consult prior editions as appropriate. In all cases only the current version
of the standard as published by ASTM is to be considered the official document.
Designation: C266 − 18 C266 − 20
Standard Test Method for
Time of Setting of Hydraulic-Cement Paste by Gillmore
1
Needles
This standard is issued under the fixed designation C266; 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 time of setting of hydraulic-cement paste by means of the Gillmore needles.
1.2 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 health practices and determine the applicability of regulatory
limitations prior to use.
Warning: Fresh hydraulic cementitious mixtures are caustic and may cause chemical burns to skin and tissue upon prolonged
2
exposure.
1.3 The text of this standard references notes and footnotes which provide explanatory material. These notes and footnotes
(excluding those in tables and figures) shall not be considered as requirements of 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, health, and environmental practices and determine the applicability of
regulatory limitations prior to use. (Warning—Fresh hydraulic cementitious mixtures are caustic and may cause chemical burns
2
to skin and tissue upon prolonged 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
3
2.1 ASTM Standards:
C151/C151M Test Method for Autoclave Expansion of Hydraulic Cement
C183/C183M Practice for Sampling and the Amount of Testing of Hydraulic Cement
C187 Test Method for Amount of Water Required for Normal Consistency of Hydraulic Cement Paste
C219 Terminology Relating to Hydraulic and Other Inorganic Cements
C305 Practice for Mechanical Mixing of Hydraulic Cement Pastes and Mortars of Plastic Consistency
1
This test method is under the jurisdiction of ASTM Committee C01 on Cement and is the direct responsibility of Subcommittee C01.30 on Time of Set.
Current edition approved Oct. 1, 2018Oct. 1, 2020. Published October 2018November 2020. Originally approved in 1951. Last previous edition approved in 20152018
as C266 – 15.C266 – 18. DOI: 10.1520/C0266-18.10.1520/C0266-20.
2
Section on Safety, Manual of Cement Testing, Annual Book of ASTM Standards, Vol 04.01.
3
For referenced ASTM standards, visit the ASTM website, www.astm.org, or contact ASTM Customer Service at [e-mail]. 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
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
1

---------------------- Page: 1 ----------------------
C266 − 20
C511 Specification for Mixing Rooms, Moist Cabinets, Moist Rooms, and Water Storage Tanks Used in the Testing of Hydraulic
Cements and Concretes
C670 Practice for Preparing Precision and Bias Statements for Test Methods for Construction Materials
C1005 Specification for Reference Masses and Devices for Determining Mass and Volume for Use in the Physical Testing of
Hydraulic Cements
D1193 Specification for Reagent Water
3. Terminology
3.1 Refer to Terminology C219 for definitions of terms.
3.1 Definitions:
3.1.1 For definitions of terms used in this test method, refer to Terminology C219.
4. Summary of Test Method
4.1 Sufficient water is added to the cement that is being tested to produce a paste of normal consistency. A specimen is molded
from this paste and is tested for time of setting by means of the Gillmore initial and final needles. The initial time of setting is the
time elapsed between initial contact of cement and water and the time when the Gillmore Initial needle does not leave a
...