ASTM C531-00(2005)
(Test Method)Standard Test Method for Linear Shrinkage and Coefficient of Thermal Expansion of Chemical-Resistant Mortars, Grouts, Monolithic Surfacings, and Polymer Concretes
Standard Test Method for Linear Shrinkage and Coefficient of Thermal Expansion of Chemical-Resistant Mortars, Grouts, Monolithic Surfacings, and Polymer Concretes
SIGNIFICANCE AND USE
This test method offers a means of comparing the relative linear shrinkage and coefficient of thermal expansion.
4.1.1 The material to be tested is placed in the mold in a fluid or plastic state. As the material makes a transition to a solid state, it adheres to and captures the end studs.
4.1.2 The linear shrinkage measured is the change in length that occurs after the material is rigid enough and strong enough to move the studs.
This test method can be used for research purposes to provide information on linear changes taking place in the test materials. Other dimensional changes may occur that do not manifest themselves as changes in length.
SCOPE
1.1 This test method covers the measurement of the linear shrinkage during setting and curing and the coefficient of thermal expansion materials.
1.2 A bar of square cross-section is cast to a prescribed length. The change in length is calculated and shown in percent. The change in length at a specific elevated temperature is measured and used to calculate the coefficient of thermal expansion.
1.3 This test method is limited to materials with aggregate size of 0.25 in. (6 mm) or less.
1.4 The values stated in inch-pound units are to be regarded as the standard. The values given in parentheses are for information only.
1.5 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.
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Standards Content (Sample)
NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.
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Designation: C531 − 00(Reapproved 2005)
Standard Test Method for
Linear Shrinkage and Coefficient of Thermal Expansion of
Chemical-Resistant Mortars, Grouts, Monolithic Surfacings,
and Polymer Concretes
This standard is issued under the fixed designation C531; 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.
This standard has been approved for use by agencies of the Department of Defense.
1. Scope 2. Referenced Documents
2.1 ASTM Standards:
1.1 This test method covers the measurement of the linear
C287Specification for Chemical-Resistant Sulfur Mortar
shrinkage during setting and curing and the coefficient of
C490PracticeforUseofApparatusfortheDeterminationof
thermalexpansionofchemical-resistantmortars,grouts,mono-
Length Change of Hardened Cement Paste, Mortar, and
lithic surfacings, and polymer concretes.
Concrete
1.2 A bar of square cross-section is cast to a prescribed
C904Terminology Relating to Chemical-Resistant Nonme-
lengthinamoldthatholdsmeasuringstudsthatarecapturedin
tallic Materials
the ends of the finished casting.
3. Terminology
1.2.1 The change in length after curing is measured and
used to calculate shrinkage.
3.1 Definitions—For definitions of terms used in this test
method, see Terminology C904.
NOTE 1—Shrinkage determinations should not be made on sulfur
mortars, since this test method cannot truly reflect the overall linear
4. Significance and Use
shrinkage of a sulfur mortar.
4.1 This test method offers a means of comparing the
1.2.2 Thechangeinlengthataspecificelevatedtemperature
relative linear shrinkage and coefficient of thermal expansion.
is measured and used to calculate the coefficient of thermal
4.1.1 The material to be tested is placed in the mold in a
expansion.
fluid or plastic state. As the material makes a transition to a
1.3 This test method is limited to materials with aggregate
solid state, it adheres to and captures the end studs.
size of 0.25 in. (6 mm) or less.
4.1.2 The linear shrinkage measured is the change in length
thatoccursafterthematerialisrigidenoughandstrongenough
1.4 Thevaluesstatedininch-poundunitsaretoberegarded
to move the studs.
as the standard. The values given in parentheses are for
information only. 4.2 This test method can be used for research purposes to
provide information on linear changes taking place in the test
1.5 This standard does not purport to address all of the
materials. Other dimensional changes may occur that do not
safety concerns, if any, associated with its use. It is the
manifest themselves as changes in length.
responsibility of the user of this standard to establish appro-
priate safety and health practices and determine the applica-
5. Apparatus
bility of regulatory limitations prior to use.
5.1 Weighing Equipment, shall be capable of weighing
materials or specimens to 60.3% accuracy.
5.2 Equipment for Mixing, consisting of a container of
suitable size preferably made of corrosion-resistant metal, or a
porcelain pan, and a sturdy spatula or trowel.
This test method is under the jurisdiction of ASTM Committee C03 on
Chemical-Resistant Nonmetallic Materialsand is the direct responsibility of Sub-
committee C03.01 on Mortars and Carbon Brick. For referenced ASTM standards, visit the ASTM website, www.astm.org, or
Current edition approved April 1, 2005. Published April 2005. Originally contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
approved in 1963. Last previous edition approved in 2000 as C531–00. DOI: Standards volume information, refer to the standard’s Document Summary page on
10.1520/C0531-00R05. the ASTM website.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
C531 − 00 (2005)
5.3 Specimen Mold, (see Practice C490) permitting the thintrowel.Levelthetopsurfacewiththespatulaandstrikeoff
molding of bars with a metal stud embedded in each end. The the excess evenly. In the case of sulfur mortars, at least three
barsshallbe1in.(25mm)squareby10in.(250mm)between separate pourings shall be made.
studs when molded. A standard 10-in. (250-mm) metal bar 6.4.7 After casting the specimens, remove the machine
shall be provided; this is used to space the studs.
screws holding the end blocks to permit free movement of the
blocks.
5.4 Studs—Nickel alloy studs, which have linear coefficient
−6 −6
of thermal expansion of 7.2×10 per °F (4×10 per °C),
7. Conditioning
knurled on one end and threaded on the other (for securing in
end blocks), approximately 0.8 in. (20 mm) long. Remove any
7.1 Resin and Sulfur Materials —Test specimens shall be
machining burrs from the flat end of the stud.
removed from molds only after an initial curing time deemed
suitable by the manufacturer.
5.5 Comparator—A direct-reading dial or digital microm-
eter to permit readings to 0.0001 in. (0.0025 mm).
7.2 Silica and Silicate Materials —Immediately after mold-
ing the specimens, cover the mold with polyethylene sheeting
5.6 Micrometers, one having a range suitable for measuring
or other suitable material to prevent rapid evaporation of
the studs (0.8 in.), and one having a range suitable for
surface moisture and subsequent deformation of the specimen
measuring the standard 10-in. (254-mm) bar, both readable to
bar. Disassemble the mold (deviations in the time mortars, etc.
0.0001 in. (0.0025 mm).
are kept in the mold, are to be reported) as described in 7.1.
5.7 Constant-Temperature Oven—An oven capable of at-
taining temperatures to 210°F (99°C) is required. The oven
8. Procedure for Linear Shrinkage
should be capable of maintaining a set temperature constant to
8.1 Determine the length of the bar by inserting it in the
63°F (61.5°C).
length comparator.
6. Test Specimens
NOTE2—Incaseswhereshrinkageinthespecimensisgreatenoughthat
comparator readings are no longer possible, insertion of a spacer (such as
6.1 Temperature— The standard temperature of the product
a metal washer) under the
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