ASTM C1038/C1038M-14

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Designation: C1038/C1038M − 14
StandardTest Method for
Expansion of Hydraulic Cement Mortar Bars Stored in
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Water
This standard is issued under the fixed designation C1038/C1038M; 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* C778 Specification for Sand
C1005 Specification for Reference Masses and Devices for
1.1 This test method covers the determination of the expan-
Determining Mass and Volume for Use in the Physical
sion of mortar bars made using hydraulic cement, of which
Testing of Hydraulic Cements
sulfate is an integral part.
C1437 Test Method for Flow of Hydraulic Cement Mortar
1.2 The values stated in either SI units or inch-pound units
D1193 Specification for Reagent Water
are to be regarded separately as standard. The values stated in
3. Significance and Use
each system may not be exact equivalents; therefore, each
system shall be used independently of the other. Combining
3.1 This test method is used to determine the amount of
values from the two systems may result in non-conformance
expansion of a mortar bar when it is stored in water. The
with the standard.
amount of mortar-bar expansion may relate to the amount of
sulfate in the cement; expansion may become excessive when
1.3 This standard does not purport to address all of the
the cement contains too much sulfate.
safety concerns, if any, associated with its use. It is the
responsibility of the user of this standard to establish appro-
3.2 Some cement specifications limit the amount of sulfate
priate safety and health practices and determine the applica-
contained in hydraulic cement by requiring that the amount of
bility of regulatory limitations prior to use. (Warning —Fresh
expansion in water not exceed a specified value.
hydraulic cementitious mixtures are caustic and may cause
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4. Apparatus
chemical burns to skin and tissue upon prolonged exposure. )
4.1 Reference Masses and Mass-Determining Devices, con-
2. Referenced Documents
forming to the requirements of Specification C1005. Evaluate
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the device for precision and bias at a total load of 2 Kg.
2.1 ASTM Standards:
C109/C109M Test Method for Compressive Strength of
4.2 Glass Graduates, Molds, and Length Comparator, con-
Hydraulic Cement Mortars (Using 2-in. or [50-mm] Cube
forming to the requirements of Specification C490.
Specimens)
4.3 MoistCabinetorRoom, conforming to the requirements
C305 Practice for Mechanical Mixing of Hydraulic Cement
of Specification C511.
Pastes and Mortars of Plastic Consistency
4.4 Mixer, Bowl, and Paddle, conforming to the require-
C490 Practice for Use ofApparatus for the Determination of
ments of Practice C305.
Length Change of Hardened Cement Paste, Mortar, and
Concrete
4.5 Trowel and Tamper, conforming to the requirements of
C511 Specification for Mixing Rooms, Moist Cabinets,
Test Method C109/C109M.
Moist Rooms, and Water Storage Tanks Used in the
5. Temperature and Relative Humidity
Testing of Hydraulic Cements and Concretes
5.1 Molding Room, Dry Materials, and Mixing Water—
Maintain the temperature of the molding room, dry materials,
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This test method is under the jurisdiction ofASTM Committee C01 on Cement and mixing water at 23.0 6 4.0 °C [73.5 6 7.0 °F], and
and is the direct responsibility of Subcommittee C01.28 on Sulfate Content.
maintain the relative humidity of the molding room at not less
Current edition approved Jan. 15, 2014. Published March 2014. Originally
than 50 %.
approved in 1985. Last previous edition approved in 2010 as C1038–10. DOI:
10.1520/C1038_C1038M-14.
6. Reagents and Materials
2
Section on Safety, Manual of Cement Testing, Annual Book of Standards, Vol.
04.01.
6.1 Mixing Water—Potable water is satisfactory for routine
3
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
tests. For all cooperative tests and in case of dispute, use
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
reagent water conforming to the numerical limits ofType III of
Standards volume information, refer to the standard’s Document Summary page on
the ASTM website. Specification D1193.
*A Summary of Changes section appears at the end of this standard
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C1038/C1038M − 14
6.2 GradedSand—Sand for making the test specimens shall place in water or saturated lime water maintained at 23.0 6 2.0
conform to the requirements for graded standard sand in °C[73.5 63.5°F]foratleast30minpriortomakingtheinitial
Specification C778. measure
...