ASTM C156-02a

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.

General Information

• Status: Historical
• Publication Date: 09-Sep-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 C156-02 - Standard Test Method for Water Retention by Concrete Curing Materials
• Effective Date: 10-Sep-2002
• Replaced By: ASTM C156-02b - Standard Test Method for Water Retention by Concrete Curing Materials
• Effective Date: 10-Dec-2002
• Referred By: ASTM C1315-19 - Standard Specification for Liquid Membrane-Forming Compounds Having Special Properties for Curing and Sealing Concrete
• Effective Date: 10-Sep-2002
• Referred By: ASTM C309-19 - Standard Specification for Liquid Membrane-Forming Compounds for Curing Concrete
• Effective Date: 10-Sep-2002
• Referred By: ASTM C171-20 - Standard Specification for Sheet Materials for Curing Concrete
• Effective Date: 10-Sep-2002

Standards Content (Sample)

NOTICE: This standard has either been superseded and replaced by a new version or discontinued.
Contact ASTM International (www.astm.org) for the latest information.
Designation: C 156 – 02a
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 * materials for contributing to an appropriate curing environment
for concrete. The laboratory test method is used both in
1.1 This test method covers laboratory determination of the
formulating and in specifying or qualifying curing products.
efficiency of liquid membrane-forming compounds and sheet
This test method gives the user a measure of the ability of
materials for curing concrete, as measured by their ability to
tested curing materials to impede the escape of moisture from
reduce moisture loss during the early hardening period.
a hydraulic cement mortar. Since it is desirable to retain
1.2 The values stated in SI units are to be regarded as the
moisture in fresh concrete to promote the hydration process,
standard. The values given in parentheses are provided for
failure of the product to minimize the escape of moisture may
information purposes only.
lead to loss of strength, cracking, shrinkage, or low abrasion
1.3 This standard does not purport to address all of the
resistance of the hardened concrete, or a combination thereof.
safety concerns, if any, associated with its use. It is the
3.2 Many factors affect the laboratory test results. Test
responsibility of the user of this standard to establish appro-
results obtained may be highly variable as indicated by the
priate safety and health practices and determine the applica-
precision statement. Critical factors include the precision of the
bility of regulatory limitations prior to use.
control of the temperature, humidity and air circulation in the
2. Referenced Documents curing cabinet, preparation and sealing of the mortar speci-
mens, the age and surface condition of the mortar specimen
2.1 ASTM Standards:
when the curing product is applied, and the uniformity and
C 87 Test Method for Effect of Organic Impurities in Fine
2
quantity of application of the curing membrane.
Aggregate on Strength of Mortar
3
C 150 Specification for Portland Cement
4. Apparatus
C 230/C 230M Specification for Flow Table for Use in Tests
3
4.1 Mechanical Mortar Mixer, as described in Practice
of Hydraulic Cement
C 305, or a larger size mixture operating on the same principle.
C 305 Practice for Mechanical Mixing of Hydraulic Cement
3
4.2 Flow Table, as described in Specification C 230/
Pastes and Mortars of Plastic Consistency
3
C 230M.
C 778 Specification for Standard Sand
4.3 Molds shall be made of metal, glass, hard rubber, or
D 1475 Test Method for Density of Liquid Coatings, Inks,
4
plastic, and shall be watertight, and rigidly constructed to
and Related Products
prevent distortion during molding of the specimens or handling
D 1653 Test Methods for Water Vapor Transmission of
4
of the mold containing fresh mortar. They shall have a
Organic Coating Films
2 2
4 minimum surface area of 12000 mm (18.6 in. ), and a
D 2369 Test Method for Volatile Content of Coatings
3
5
minimum depth of 19 mm ( ⁄4 in.). The top surface shall be
E 178 Practice for Dealing with Outlying Observations
round, square, or rectangular with length not more than twice
3. Significance and Use
the width. The top of the mold shall have a rim to provide a
firm level surface to support the wood float and to facilitate the
3.1 The moisture retaining ability of a product as deter-
grooving and sealing steps of the procedure. The rim shall be
mined by this test method is used to assess the suitability of
parallel with the bottom surface of the mold.
1
This test method is under the jurisdiction of ASTM Committee C09 on NOTE 1—Take care to avoid use of an excessive amount of oil, grease,
Concrete and Concrete Aggregates and is the direct responsibility of Subcommittee
or mold release compound on molds, particularly along the top rim where
C09.22 on Materials Applied to New Concrete Surfaces.
sealing compound will be applied. Use of masking tape on the top rim
Current edition approved Sept. 10, 2002. Published October 2002. Originally
during application of release compound to prevent contamination has been
published as C 156 – 40 T. Last previous edition C 156 – 02.
found expedient.
2
Annual Book of ASTM Standards, Vol 04.02.
3
Annual Book of ASTM Standards, Vol 04.01.
4.4 Spoon—A stainless steel serving spoon having a bowl
4
Annual Book of ASTM Standards, Vol 06.01.
75 to 100 mm (3 to 4 in.) long and 50 to
...