ASTM C806-23
(Test Method)Standard Test Method for Restrained Expansion of Expansive Cement Mortar
Standard Test Method for Restrained Expansion of Expansive Cement Mortar
ABSTRACT
This test method covers the standard procedure for determination of length changes of expansive cement mortar, while under restraint, due to the development of internal forces resulting from hydration of the cement. The test apparatus is comprised of the following: molds for casting test specimens; restraining cage which consists of a threaded steel rod with steel end plates held in place by cap nuts for corrosion prevention; length comparator; tamper which shall be made of nonabsorptive, nonabrasive material such as medium-hard rubber or seasoned oak wood; device for demolding specimens; weights and weighing devices; glass graduates to measure the mixing water in a single operation; an electrically driven mechanical mixer equipped with paddle and mixing bowl; and trowel which shall have a steel blade with straight edges. The sand to be used shall comply with the graded sand requirement and shall be handled in such a manner as to prevent segregation. Details on preparation and assembly of specimen molds and restraining cage, proportioning and mixing of mortars, molding, and curing of specimens are discussed. The expansion and shrinkage of the test specimens at any age shall be calculated and the length-change data, expressed as linear expansion or contraction based on the length of the specimen at any time of molding, shall be reported. Bias and precision in the batch, single, and multi-laboratory operation shall also be identified.
SCOPE
1.1 This test method covers the determination of length changes of expansive cement mortar, while under restraint, due to the development of internal forces resulting from hydration of the cement.
1.2 The values stated in inch-pound units are to be regarded as standard. The values given in parentheses are mathematical conversions to SI units that are provided for information only and are not considered 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 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, health, and environmental practices and determine the applicability of regulatory limitations prior to use. (Warning—Fresh hydraulic cement mixtures are caustic and may cause 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.
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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: C806 − 23
Standard Test Method for
1
Restrained Expansion of Expansive Cement Mortar
This standard is issued under the fixed designation C806; 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* Hydraulic Cement Mortars (Using 2-in. or [50 mm] Cube
Specimens)
1.1 This test method covers the determination of length
C150 Specification for Portland Cement
changes of expansive cement mortar, while under restraint, due
C157/C157M Test Method for Length Change of Hardened
to the development of internal forces resulting from hydration
Hydraulic-Cement Mortar and Concrete
of the cement.
C219 Terminology Relating to Hydraulic and Other Inor-
1.2 The values stated in inch-pound units are to be regarded
ganic Cements
as standard. The values given in parentheses are mathematical
C305 Practice for Mechanical Mixing of Hydraulic Cement
conversions to SI units that are provided for information only
Pastes and Mortars of Plastic Consistency
and are not considered standard.
C490/C490M Practice for Use of Apparatus for the Deter-
1.3 The text of this standard references notes and footnotes mination of Length Change of Hardened Cement Paste,
Mortar, and Concrete
which provide explanatory material. These notes and footnotes
(excluding those in tables and figures) shall not be considered C595 Specification for Blended Hydraulic Cements
C670 Practice for Preparing Precision and Bias Statements
as requirements of this standard.
for Test Methods for Construction Materials
1.4 This standard does not purport to address all of the
C778 Specification for Standard Sand
safety concerns, if any, associated with its use. It is the
C845 Specification for Expansive Hydraulic Cement
responsibility of the user of this standard to establish appro-
C1005 Specification for Reference Masses and Devices for
priate safety, health, and environmental practices and deter-
Determining Mass and Volume for Use in Physical Testing
mine the applicability of regulatory limitations prior to use.
of Hydraulic Cements
(Warning—Fresh hydraulic cement mixtures are caustic and
2
F606/F606M Test Methods for Determining the Mechanical
may cause burns to skin and tissue upon prolonged exposure. )
Properties of Externally and Internally Threaded
1.5 This international standard was developed in accor-
Fasteners, Washers, Direct Tension Indicators, and Rivets
dance with internationally recognized principles on standard-
4
ization established in the Decision on Principles for the
2.2 ACI Documents:
Development of International Standards, Guides and Recom- ACI 223 Shrinkage – Compensating Concrete – Guide
mendations issued by the World Trade Organization Technical
Barriers to Trade (TBT) Committee.
3. Terminology
3.1 Definitions of terms used in this test method are given in
2. Referenced Documents
Terminology C219.
3
2.1 ASTM Standards:
3.2 Definitions:
A307 Specification for Carbon Steel Bolts, Studs, and
3.2.1 expansive component system, n—a combination of
Threaded Rod 60 000 PSI Tensile Strength
portland cement conforming to Specification C150 or portland-
C109/C109M Test Method for Compressive Strength of
limestone cement conforming to Specification C595 and an
expansive component that, when mixed with water, forms a
paste that increases in volume after setting.
1
This test method is under the jurisdiction of ASTM Committee C01 on Cement
3.2.1.1 Discussion—The expansive component system is an
and is the direct responsibility of Subcommittee C01.13 on Special Cements.
Current edition approved Dec. 15, 2023. Published December 2023. Originally
alternate way to produce a cement that meets Specification
approved in 1975. Last previous edition approved in 2018 as C806 – 18. DOI:
C845 performance requirements. Expansive component system
10.1520/C0806-23.
is also defined in ACI 223.
2
Section of 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 service@astm.org. For Annual Book of ASTM
4
Standards volume information, refer to the standard’s Document Summary page on Available from American Concrete Institute (ACI), 38800 Country Club Dr.,
the ASTM website. Farmington Hills, MI 48331-3439, http://www.concrete.org.
*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 19428-29
...
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: C806 − 18 C806 − 23
Standard Test Method for
1
Restrained Expansion of Expansive Cement Mortar
This standard is issued under the fixed designation C806; 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 Scope*
1.1 This test method covers the determination of length changes of expansive cement mortar, while under restraint, due to the
development of internal forces resulting from hydration of the cement.
1.2 The values stated in inch-pound units are to be regarded as standard. The values given in parentheses are mathematical
conversions to SI units that are provided for information only and are not considered 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 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, health, and environmental practices and determine the applicability of
regulatory limitations prior to use. (Warning—Fresh hydraulic cement mixtures are caustic and may cause burns to skin and tissue
2
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:
A307 Specification for Carbon Steel Bolts, Studs, and Threaded Rod 60 000 PSI Tensile Strength
C109/C109M Test Method for Compressive Strength of Hydraulic Cement Mortars (Using 2-in. or [50 mm] Cube Specimens)
C150 Specification for Portland Cement
C157/C157M Test Method for Length Change of Hardened Hydraulic-Cement Mortar and Concrete
C219 Terminology Relating to Hydraulic and Other Inorganic Cements
C305 Practice for Mechanical Mixing of Hydraulic Cement Pastes and Mortars of Plastic Consistency
C490/C490M Practice for Use of Apparatus for the Determination of Length Change of Hardened Cement Paste, Mortar, and
Concrete
C595 Specification for Blended Hydraulic Cements
C670 Practice for Preparing Precision and Bias Statements for Test Methods for Construction Materials
C778 Specification for Standard Sand
C845 Specification for Expansive Hydraulic Cement
1
This test method is under the jurisdiction of ASTM Committee C01 on Cement and is the direct responsibility of Subcommittee C01.13 on Special Cements.
Current edition approved July 1, 2018Dec. 15, 2023. Published July 2018December 2023. Originally approved in 1975. Last previous edition approved in 20122018 as
C806 – 12.C806 – 18. DOI: 10.1520/C0806-18.10.1520/C0806-23.
2
Section of 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 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
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
1
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C806 − 23
C1005 Specification for Reference Masses and Devices for Determining Mass and Volume for Use in Physical Testing of
Hydraulic Cements
F606/F606M Test Methods for Determining the Mechanical Properties of Externally and Internally Threaded Fasteners,
Washers, Direct Tension Indicators, and Rivets
4
2.2 ACI Documents:
ACI 223 Shrinkage – Compensating Concrete – Guide
3. Terminology
3.1 Definitions of terms used in this test method are given in Terminology C219.
3.2 Definitions:
3.2.1 expansive component system, n—a combination of portland cement conforming to Specification C150 or portland-limestone
cement conforming to Specification C595 and an expansive component that, when mixed with water, forms a paste that increases
in volume after setting.
3.2.1.1 Discussion—
The expansive component system is an alternate way
...
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