ASTM C531-00

Standard Test Method for Linear Shrinkage and Coefficient of Thermal Expansion of Chemical-Resistant Mortars, Grouts, Monolithic Surfacings, and Polymer Concretes

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.

General Information

• Status: Historical
• Publication Date: 09-Mar-2000
• ICS: 91.100.10 - Cement. Gypsum. Lime. Mortar
• Technical Committee: D01 - Paint and Related Coatings, Materials, and Applications
• Drafting Committee: D01.46 - Industrial Protective Coatings

Relations

• Replaced By: ASTM C531-00(2005) - Standard Test Method for Linear Shrinkage and Coefficient of Thermal Expansion of Chemical-Resistant Mortars, Grouts, Monolithic Surfacings, and Polymer Concretes
• Effective Date: 01-Apr-2005
• Referred By: ASTM C722-18(2023) - Standard Specification for Chemical-Resistant Monolithic Floor Surfacings
• Effective Date: 10-Mar-2000

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NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.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:C531–00
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 (e) 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 of Length Change of Hardened Cement Paste, Mortar, and
Concrete
1.1 This test method covers the measurement of the linear
C904 Terminology Relating to Chemical-Resistant Non-
shrinkage during setting and curing and the coefficient of
metallic Materials
thermalexpansionofchemical-resistantmortars,grouts,mono-
lithic surfacings, and polymer concretes.
3. Terminology
1.2 A bar of square cross-section is cast to a prescribed
3.1 Definitions—For definitions of terms used in this test
lengthinamoldthatholdsmeasuringstudsthatarecapturedin
method, see Terminology C904.
the ends of the finished casting.
1.2.1 The change in length after curing is measured and
4. Significance and Use
used to calculate shrinkage.
4.1 This test method offers a means of comparing the
NOTE 1—Shrinkage determinations should not be made on sulfur
relative linear shrinkage and coefficient of thermal expansion.
mortars, since this test method cannot truly reflect the overall linear
4.1.1 The material to be tested is placed in the mold in a
shrinkage of a sulfur mortar.
fluid or plastic state. As the material makes a transition to a
1.2.2 Thechangeinlengthataspecificelevatedtemperature
solid state, it adheres to and captures the end studs.
is measured and used to calculate the coefficient of thermal
4.1.2 The linear shrinkage measured is the change in length
expansion.
thatoccursafterthematerialisrigidenoughandstrongenough
1.3 This test method is limited to materials with aggregate
to move the studs.
size of 0.25 in. (6 mm) or less.
4.2 This test method can be used for research purposes to
1.4 The values stated in inch-pound units are to be regarded
provide information on linear changes taking place in the test
as the standard. The values given in parentheses are for
materials. Other dimensional changes may occur that do not
information only.
manifest themselves as changes in length.
1.5 This standard does not purport to address all of the
5. Apparatus
safety concerns, if any, associated with its use. It is the
responsibility of the user of this standard to establish appro-
5.1 Weighing Equipment, shall be capable of weighing
priate safety and health practices and determine the applica-
materials or specimens to 60.3% accuracy.
bility of regulatory limitations prior to use.
5.2 Equipment for Mixing, consisting of a container of
suitable size preferably made of corrosion-resistant metal, or a
2. Referenced Documents
porcelain pan, and a sturdy spatula or trowel.
2.1 ASTM Standards:
5.3 Specimen Mold, (see Practice C490) permitting the
C287 Specification for Chemical-Resistant Sulfur Mortar
molding of bars with a metal stud embedded in each end. The
C490 Practice for Use of Apparatus for the Determination
barsshallbe1in.(25mm)squareby10in.(250mm)between
studs when molded. A standard 10-in. (250-mm) metal bar
shall be provided; this is used to space the studs.
This test method is under the jurisdiction of ASTM Committee C-3 on
5.4 Studs—Nickel alloy studs, which have linear coefficient
Chemical-Resistant Nonmetallic Materialsand is the direct responsibility of Sub-
−6 −6
of thermal expansion of 7.2 310 per °F (4 310 per °C),
committee C03.01 on Test Methods.
Current edition approved March 10, 2000. Published April 2000. Originally
published as C531–63 T. Last previous edition C531–95.
2 3
Annual Book of ASTM Standards, Vol 04.05. Annual Book of ASTM Standards, Vol 04.01.
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C531
knurled on one end and threaded on the other (for securing in 7. Conditioning
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
5.5 Comparator—Adirect-reading dial or digital microme-
suitable by the manufacturer.
ter 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
NOTE 2—In cases where shrinkage in the specimens is great enough
that comparator readings are no longer possible, insertion of a spacer
6.1 Temperature— The standard temperature of the product
(such as a metal washer) under the bottom stud holder of the comparator
constituents, mold apparatus, and the temperature in the
will enable readings to be made. When this is necessary, standard bar
vicinityofthemixingoperationshallbe73 64°F(23 62°C),
readings will also change and proper adjustments in calculation must be
unless
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