ASTM C156-02b

Standard Test Method for Water Retention by Concrete Curing Materials

SCOPE
1.1 This test method covers laboratory determination of the efficiency of liquid membrane-forming compounds and sheet materials for curing concrete, as measured by their ability to reduce moisture loss during the early hardening period.
1.2 The values stated in SI units are to be regarded as the standard. The values given in parentheses are provided for information purposes only.
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. (Warning—Fresh hydraulic cementitious mixtures are caustic and may cause chemical burns to skin and tissue upon prolonged exposure.)

General Information

• Status: Historical
• Publication Date: 09-Dec-2002
• ICS: 91.100.30 - Concrete and concrete products
• Technical Committee: C09 - Concrete and Concrete Aggregates
• Drafting Committee: C09.22 - Materials Applied to New Concrete Surfaces

Relations

• Replaces: ASTM C156-02a - Standard Test Method for Water Retention by Concrete Curing Materials
• Effective Date: 10-Dec-2002
• Replaced By: ASTM C156-03 - Standard Test Method for Water Retention by Concrete Curing Materials
• Effective Date: 10-Jul-2003
• Referred By: ASTM C1315-19 - Standard Specification for Liquid Membrane-Forming Compounds Having Special Properties for Curing and Sealing Concrete
• Effective Date: 10-Dec-2002
• Referred By: ASTM C171-20 - Standard Specification for Sheet Materials for Curing Concrete
• Effective Date: 10-Dec-2002
• Referred By: ASTM C309-19 - Standard Specification for Liquid Membrane-Forming Compounds for Curing Concrete
• Effective Date: 10-Dec-2002

Standards Content (Sample)

NOTICE: This standard has either been superceded and replaced by a new version or discontinued.
Contact ASTM International (www.astm.org) for the latest information.
Designation: C 156 – 02b
Standard Test Method for
1
Water Retention by Concrete Curing Materials
This standard is issued under the fixed designation C 156; 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 * 3. Significance and Use
1.1 This test method covers laboratory determination of the 3.1 The moisture retaining ability of a product as deter-
efficiency of liquid membrane-forming compounds and sheet mined by this test method is used to assess the suitability of
materials for curing concrete, as measured by their ability to materials for contributing to an appropriate curing environment
reduce moisture loss during the early hardening period. for concrete. The laboratory test method is used both in
1.2 The values stated in SI units are to be regarded as the formulating and in specifying or qualifying curing products.
standard. The values given in parentheses are provided for This test method gives the user a measure of the ability of
information purposes only. tested curing materials to impede the escape of moisture from
1.3 This standard does not purport to address all of the a hydraulic cement mortar. Since it is desirable to retain
safety concerns, if any, associated with its use. It is the moisture in fresh concrete to promote the hydration process,
responsibility of the user of this standard to establish appro- failure of the product to minimize the escape of moisture may
priate safety and health practices and determine the applica- lead to loss of strength, cracking, shrinkage, or low abrasion
bility of regulatory limitations prior to use.(Warning—Fresh resistance of the hardened concrete, or a combination thereof.
hydraulic cementitious mixtures are caustic and may cause 3.2 Many factors affect the laboratory test results. Test
2
chemical burns to skin and tissue upon prolonged exposure.) results obtained may be highly variable as indicated by the
precision statement. Critical factors include the precision of the
2. Referenced Documents
control of the temperature, humidity and air circulation in the
2.1 ASTM Standards:
curing cabinet, preparation and sealing of the mortar speci-
C 87 Test Method for Effect of Organic Impurities in Fine mens, the age and surface condition of the mortar specimen
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Aggregate on Strength of Mortar
when the curing product is applied, and the uniformity and
4
C 150 Specification for Portland Cement quantity of application of the curing membrane.
C 230/C 230M Specification for Flow Table for Use in Tests
4
4. Apparatus
of Hydraulic Cement
C 305 Practice for Mechanical Mixing of Hydraulic Cement 4.1 Mechanical Mortar Mixer, as described in Practice
4
Pastes and Mortars of Plastic Consistency C 305, or a larger size mixture operating on the same principle.
4
C 778 Specification for Standard Sand 4.2 Flow Table, as described in Specification C 230/
D 1475 Test Method for Density of Liquid Coatings, Inks, C 230M.
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and Related Products 4.3 Molds shall be made of metal, glass, hard rubber, or
D 1653 Test Methods for Water Vapor Transmission of plastic, and shall be watertight, and rigidly constructed to
5
Organic Coating Films prevent distortion during molding of the specimens or handling
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D 2369 Test Method for Volatile Content of Coatings of the mold containing fresh mortar. They shall have a
6 2 2
E 178 Practice for Dealing with Outlying Observations minimum surface area of 12000 mm (18.6 in. ), and a
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minimum depth of 19 mm ( ⁄4 in.). The top surface shall be
round, square, or rectangular with length not more than twice
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This test method is under the jurisdiction of ASTM Committee C09 on
the width. The top of the mold shall have a rim to provide a
Concrete and Concrete Aggregates and is the direct responsibility of Subcommittee
firm level surface to support the wood float and to facilitate the
C09.22 on Materials Applied to New Concrete Surfaces.
grooving and sealing steps of the procedure. The rim shall be
Current edition approved Dec. 10, 2002. Published January 2003. Originally
approved in 1940. Last previous edition approved in 2002 as C 156 – 02a.
parallel with the bottom surface of the mold.
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Section on Safety Precautions, Manual of Aggregate and Concrete Testing,
Annual Book of ASTM Standards, Vol 04.02. NOTE 1—Take care to avoid use of an excessive amount of oil, grease,
3
Annual Book of ASTM Standards, Vol 04.02.
or mold release compound on molds, particularly along the top rim where
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Annual Book of ASTM Standards, Vol 04.01.
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Annual Book of ASTM Standards, Vol
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