Standard Test Method for Length Change of Hardened Hydraulic-Cement, Mortar, and Concrete

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1.1 This test method covers the determination of the length changes that are produced by causes other than externally applied forces and temperature changes in hardened hydraulic-cement mortar and concrete specimens made in the laboratory and exposed to controlled conditions of temperature and moisture.
1.2 The values stated in either inch-pound or SI units are to be regarded separately as standard. An exception is with regard to sieve sizes and nominal size of aggregate, in which the SI values are the standard as stated in Specification E 11. Within the text, the SI units are shown in brackets. The values stated in each system are not exact equivalents; therefore, each system must be used independently of the other, without combining values in any way.
1.3 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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09-Jun-2003
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ASTM C157/C157M-03 - Standard Test Method for Length Change of Hardened Hydraulic-Cement, Mortar, and Concrete
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NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.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: C 157/C 157M – 03
Standard Test Method for
Length Change of Hardened Hydraulic-Cement Mortar and
1
Concrete
This standard is issued under the fixed designation C 157/C 157M; 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 (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
,
3 2
Concrete
1.1 This test method covers the determination of the length
C 511 Specification for Moist Cabinets, Moist Rooms, and
changes that are produced by causes other than externally
Water Storage Tanks Used in the Testing of Hydraulic
applied forces and temperature changes in hardened hydraulic-
3,2
Cements and Concretes
cement mortar and concrete specimens made in the laboratory
C 596 Test Method for Drying Shrinkage of Mortar Con-
and exposed to controlled conditions of temperature and
3
taining Hydraulic Cement
moisture.
C 1437 Test Method for Determining Flow of Hydraulic
1.2 The values stated in either inch-pound or SI units are to
3
Cement Mortar
be regarded separately as standard. An exception is with regard
E 11 Specification for Wire Cloth and Sieves for Testing
to sieve sizes and nominal size of aggregate, in which the SI
4
Purposes
values are the standard as stated in Specification E 11. Within
E 337 Test Method for Measuring Humidity with a Psy-
the text, the SI units are shown in brackets. The values stated
chrometer (the Measurement of Wet- and Dry-Bulb Tem-
in each system are not exact equivalents; therefore, each
5
peratures)
system must be used independently of the other, without
combining values in any way.
3. Terminology
1.3 This standard does not purport to address all of the
3.1 Definitions—The terms used in this test method are
safety concerns, if any, associated with its use. It is the
defined in Terminology C 125.
responsibility of the user of this standard to establish appro-
3.2 Definitions of Terms Specific to This Standard:
priate safety and health practices and determine the applica-
3.2.1 length change, n—an increase or decrease in the
bility of regulatory limitations prior to use.
length of a test specimen that has been caused to change by any
2. Referenced Documents factor other than externally applied forces and temperature
changes.
2.1 ASTM Standards:
C 125 Terminology Relating to Concrete and Concrete
4. Significance and Use
2
Aggregates
4.1 Measurement of length change permits assessment of
C 143/C 143M Test Method for Slump of Hydraulic Ce-
2 the potential for volumetric expansion or contraction of mortar
ment Concrete
2 or concrete due to various causes other than applied force or
C 172 Practice for Sampling Freshly Mixed Concrete
temperature change. This test method is particularly useful for
C 192/C 192M Practice for Making and Curing Concrete
2 comparative evaluation of this potential in different hydraulic-
Test Specimens in the Laboratory
cement mortar or concrete mixtures.
C 305 Practice for Mechanical Mixing of Hydraulic Cement
3
4.2 This test method provides useful information for experi-
Pastes and Mortars of Plastic Consistency
mental purposes or for products that require testing under
C 490 Practice for Use of Apparatus for the Determination
nonstandard mixing, placing, handling, or curing conditions,
such as high product workability or different demolding times.
Standard conditions are described in 5.4.1.
1
This test method is under the jurisdiction of ASTM Committee C09 on
4.3 If conditions for mixing, curing, sampling, and storage
Concrete and Concrete Aggregates and is the direct responsibility of Subcommittee
other than specified in this test method are required, they shall
C09.68 on Methods of Testing for Volume Changes of Concrete and Concrete
Aggregates.
Current edition approved June 10, 2003. Published September 2003. Originally
approved in 1940. Last previous edition approved in 1999 as C 157/C 157M – 99.
2 4
Annual Book of ASTM Standards, Vol 04.02. Annual Book of ASTM Standards, Vol 14.02.
3 5
Annual Book of ASTM Standards, Vol 04.01. Annual Book of ASTM Standards, Vol 11.03.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.
1

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C 157/C 157M – 03
FIG. 1 Atmometer
be reported but are not to be considered as standard conditions departure from standard conditions shall be reported clearly
of this test method. Nonstandard conditions and the reasons for and prominently with comparator values.
2

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