ASTM C490-07

Standard Practice for Use of Apparatus for the Determination of Length Change of Hardened Cement Paste, Mortar, and Concrete

SIGNIFICANCE AND USE
This practice is intended to provide standard requirements for apparatus common to many test methods used in connection with cement and concrete and standardized procedures for its use. The detailed requirements as to materials, mixtures, specimens, conditioning of specimens, number of specimens, ages at which measurements are to be made, interpretation of results, and precision and bias are left to be dealt with in specific test methods.
SCOPE
1.1 This practice covers the requirements for the apparatus and equipment used to prepare specimens for the determination of length change in hardened cement paste, mortar, and concrete, the apparatus and equipment used for the determination of these length changes, and the procedures for its use.
1.2 Methods for the preparation and curing of test specimens, conditions of testing and curing, and detailed procedures for calculating and reporting test results are contained in applicable test methods.
1.3 The values stated in SI units or inch-pound units are to be regarded as standard. The values in each system may not be exact equivalents; therefore, each system shall be used independently of the other. Combining values from the two systems may result in nonconformance with the standard.

General Information

• Status: Historical
• Publication Date: 31-May-2007
• ICS: 91.100.10 - Cement. Gypsum. Lime. Mortar
• ICS: 91.100.30 - Concrete and concrete products
• Technical Committee: C01 - Cement
• Drafting Committee: C01.95 - Coordination of Standards

Relations

• Replaces: ASTM C490-04 - Standard Practice for Use of Apparatus for the Determination of Length Change of Hardened Cement Paste, Mortar, and Concrete
• Effective Date: 01-Jun-2007
• Replaced By: ASTM C490/C490M-08 - Standard Practice for Use of Apparatus for the Determination of Length Change of Hardened Cement Paste, Mortar, and Concrete
• Effective Date: 01-Jun-2008
• Referred By: ASTM C1105-08a(2016) - Standard Test Method for Length Change of Concrete Due to Alkali-Carbonate Rock Reaction
• Effective Date: 01-Jun-2007
• Referred By: ASTM C531-18 - Standard Test Method for Linear Shrinkage and Coefficient of Thermal Expansion of Chemical-Resistant Mortars, Grouts, Monolithic Surfacings, and Polymer Concretes
• Effective Date: 01-Jun-2007
• Referred By: ASTM C1038/C1038M-19 - Standard Test Method for Expansion of Hydraulic Cement Mortar Bars Stored in Water
• Effective Date: 01-Jun-2007
• Referred By: ASTM C666/C666M-15 - Standard Test Method for Resistance of Concrete to Rapid Freezing and Thawing
• Effective Date: 01-Jun-2007
• Referred By: ASTM C1646/C1646M-16 - Standard Practice for Making and Curing Test Specimens for Evaluating Resistance of Coarse Aggregate to Freezing and Thawing in Air-Entrained Concrete
• Effective Date: 01-Jun-2007
• Referred By: ASTM C157/C157M-17 - Standard Test Method for Length Change of Hardened Hydraulic-Cement Mortar and Concrete
• Effective Date: 01-Jun-2007

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:C490–07
Standard Practice for
Use of Apparatus for the Determination of Length Change of
1
Hardened Cement Paste, Mortar, and Concrete
This standard is issued under the fixed designation C 490; 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.
1. Scope* mixtures, specimens, conditioning of specimens, number of
specimens, ages at which measurements are to be made,
1.1 This practice covers the requirements for the apparatus
interpretation of results, and precision and bias are left to be
andequipmentusedtopreparespecimensforthedetermination
dealt with in specific test methods.
of length change in hardened cement paste, mortar, and
concrete, the apparatus and equipment used for the determina-
5. Apparatus
tion of these length changes, and the procedures for its use.
5.1 Reference Masses and Devices for Determining Mass
1.2 Methods for the preparation and curing of test speci-
andVolume, shall conform to the requirements of Specification
mens, conditions of testing and curing, and detailed procedures
C 1005.
for calculating and reporting test results are contained in
5.2 Molds, shall have either one or two compartments and
applicable test methods.
shall be constructed as shown in Fig. 1 or Fig. 2. Molds for test
1.3 The values stated in SI units or inch-pound units are to
specimens used in determining the length change of cement
be regarded as standard. The values in each system may not be
pastes and mortars shall provide for 25 by 25 by 285-mm
exact equivalents; therefore, each system shall be used inde-
1
prisms having a 250-mm gauge length, or for 1 by 1 by 11 ⁄4
pendentlyoftheother.Combiningvaluesfromthetwosystems
–in. prisms having a 10–in. gauge length. Molds for test
may result in nonconformance with the standard.
specimens used in the length change of concretes shall provide
2. Referenced Documents for prisms of the desired cross section having a 10-in. or
2
250-mm gauge length. In some routine tests, 25 by 25 by
2.1 ASTM Standards:
160-mm specimens with a gauge length of 125 mm, or 1 by 1
C511 Specification for Mixing Rooms, Moist Cabinets,
1
by 6 ⁄4 –in. specimens with a gauge length of 5-in. are
Moist Rooms, and Water Storage Tanks Used in the
permitted, but in case of dispute, results obtained with speci-
Testing of Hydraulic Cements and Concretes
mens of 250-mm [10-in.] gauge length shall govern.
C 1005 Specification for Reference Masses and Devices for
5.2.1 The gauge length shall be considered as the nominal
Determining Mass and Volume for Use in the Physical
length between the innermost ends of the gauge studs. The
Testing of Hydraulic Cements
parts of the molds shall be tight fitting and firmly held together
3. Terminology when assembled, and their surfaces shall be smooth and free of
pits. The molds shall be made of steel or other hard metal not
3.1 length change—an increase or decrease in the linear
readily attacked by the cement paste, mortar, or concrete. The
dimension of a test specimen, measured along the longitudinal
sides of the molds shall be sufficiently rigid to prevent
axis, due to causes other than applied load.
spreading or warping. For the molds shown in Fig. 1, the
4. Significance and Use
tolerance on dimensionAis 60.7 mm. For the molds shown in
Fig. 2, the tolerance on dimension A is 60.03 in.
4.1 This practice is intended to provide standard require-
5.2.2 Each end plate of the mold shall be equipped to hold
ments for apparatus common to many test methods used in
properly in place, during the setting period, one of the gauge
connection with cement and concrete and standardized proce-
studs shown in Fig. 1 or Fig. 2. The gauge studs shall be of
dures for its use. The detailed requirements as to materials,
3
American Iron and Steel Institute (AISI) Type 316 stainless
steel or other corrosion-resistant metal of similar hardness.
1
Gauge studs of Invar or similar metal shall be used when
This practice is under the jurisdiction ofASTM Committee C01 on Cement and
is the direct responsibility of Subcommittee C01.95 on Coordination of Standards.
specimens are tested at widely different temperatures. To
CurrenteditionapprovedJune1,2007.PublishedJuly2007.Originallyapproved
in 1962. Last previous edition approved in 2004 as C 490 – 04.
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
3
contact ASTM Customer Service at [e-mail]. For Annual Book of ASTM Details on this material are available from American Iron and Steel Institute
Standards volume information, refer to the standard’s Document Summary page on (AISI), 1140 Connecticut Ave., NW, Sui
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