ASTM C806-18
(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 − 18
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.Anumber 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
C157/C157MTest Method for Length Change of Hardened
changesofexpansivecementmortar,whileunderrestraint,due
Hydraulic-Cement Mortar and Concrete
to the development of internal forces resulting from hydration
C219Terminology Relating to Hydraulic Cement
of the cement.
C305Practice for Mechanical Mixing of Hydraulic Cement
1.2 The values stated in inch-pound units are to be regarded
Pastes and Mortars of Plastic Consistency
as standard. The values given in parentheses are mathematical
C490/C490MPractice for Use of Apparatus for the Deter-
conversions to SI units that are provided for information only
mination of Length Change of Hardened Cement Paste,
and are not considered standard.
Mortar, and Concrete
1.3 The text of this standard references notes and footnotes C670Practice for Preparing Precision and Bias Statements
for Test Methods for Construction Materials
which provide explanatory material.These notes and footnotes
(excluding those in tables and figures) shall not be considered C778Specification for Standard Sand
C1005Specification for Reference Masses and Devices for
as requirements of this standard.
Determining Mass and Volume for Use in the Physical
1.4 This standard does not purport to address all of the
Testing of Hydraulic Cements
safety concerns, if any, associated with its use. It is the
F606/F606MTest Methods for Determining the Mechanical
responsibility of the user of this standard to establish appro-
Properties of Externally and Internally Threaded
priate safety, health, and environmental practices and deter-
Fasteners, Washers, Direct Tension Indicators, and Rivets
mine the applicability of regulatory limitations prior to use.
(Warning—Fresh hydraulic cement mixtures are caustic and
2 3. Terminology
maycauseburnstoskinandtissueuponprolongedexposure. )
1.5 This international standard was developed in accor- 3.1 Definitionsoftermsusedinthistestmethodaregivenin
dance with internationally recognized principles on standard- Terminology C219.
ization established in the Decision on Principles for the
Development of International Standards, Guides and Recom- 4. Apparatus
mendations issued by the World Trade Organization Technical
4.1 Molds—The molds for casting test specimens, when
Barriers to Trade (TBT) Committee.
used in conjunction with the restraining cage described in 4.2,
shall provide for forming either 2 by 2 by 10-in. prisms having
2. Referenced Documents
a 10-in. gage length, or 50 by 50 by 250-mm prisms having a
3
2.1 ASTM Standards:
250-mmgagelength.Themoldsshallotherwiseconformtothe
A307Specification for Carbon Steel Bolts, Studs, and requirements of Practice C490/C490M, except that the gage
Threaded Rod 60000 PSI Tensile Strength
stud holder, gage studs, and spacer screws described in that
C109/C109MTest Method for Compressive Strength of specification will not be used.
4.2 Restraining Cage, consisting of a threaded steel rod
with steel end plates held in place by nuts as shown in Fig. 1.
1
This test method is under the jurisdiction ofASTM Committee C01 on Cement
The rod shall be provided with cap nuts for prevention of
and is the direct responsibility of Subcommittee C01.13 on Special Cements.
corrosion. The rod shall conform to Specification A307 Grade
CurrenteditionapprovedJuly1,2018.PublishedJuly2018.Originallyapproved
in 1975. Last previous edition approved in 2012 as C806–12. DOI: 10.1520/
A except, it shall support 1180-lbf (5249 N) proof load when
C0806-18.
tested in accordance with Method 1 of Test Methods F606/
2
SectionofSafety,ManualofCementTesting,AnnualBookofASTMStandards,
F606M.
Vol 04.01.
3
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
4.3 Length Comparator—The length comparator for mea-
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
suring length shall conform to and be used in accordance with
Standards volume information, refer to the standard’s Document Summary page on
the ASTM website. the requirements of Practice C490/C490M. If the terminals of
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken,
...
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 − 12 C806 − 18
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
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 safety, health, and healthenvironmental practices and determine the
applicability of regulatory limitations prior to use. (Warning—Fresh hydraulic cement mixtures are caustic and may cause 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:
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)
C157/C157M Test Method for Length Change of Hardened Hydraulic-Cement Mortar and Concrete
C219 Terminology Relating to Hydraulic Cement
C305 Practice for Mechanical Mixing of Hydraulic Cement Pastes and Mortars of Plastic Consistency
C490C490/C490M Practice for Use of Apparatus for the Determination of Length Change of Hardened Cement Paste, Mortar,
and Concrete
C670 Practice for Preparing Precision and Bias Statements for Test Methods for Construction Materials
C778 Specification for Standard Sand
C1005 Specification for Reference Masses and Devices for Determining Mass and Volume for Use in the Physical Testing of
Hydraulic Cements
F606F606/F606M Test Methods for Determining the Mechanical Properties of Externally and Internally Threaded Fasteners,
Washers, and Rivets (Metric) F0606_F0606M Direct Tension Indicators, and Rivets
3. Terminology
3.1 Definitions of terms used in this test method are given in Terminology C219.
4. Apparatus
4.1 Molds—The molds for casting test specimens, when used in conjunction with the restraining cage described in 4.2, shall
provide for forming either 2 by 2 by 10-in. prisms having a 10-in. gage length, or 50 by 50 by 250-mm prisms having a 250-mm
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 Dec. 15, 2012July 1, 2018. Published February 2013July 2018. Originally approved in 1975. Last previous edition approved in 20042012 as
C806 – 04.C806 – 12. DOI: 10.1520/C0806-12.10.1520/C0806-18.
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.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
1
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C806 − 18
gage length. The molds shall otherwise conform to the requirements of Practice C490C490/C490M, except that the gage stud
holder, gage studs, and spacer screws described in that specification will not be used.
4.2 Restraining Cage, consisting of a threaded steel rod with steel end plates held in place by nuts as shown in Fig. 1. The rod
sh
...
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