ASTM C156-09
(Test Method)Standard Test Method for Water Retention by Liquid Membrane-Forming Curing Compounds for Concrete
Standard Test Method for Water Retention by Liquid Membrane-Forming Curing Compounds for Concrete
SIGNIFICANCE AND USE
The moisture retaining ability of a product as determined by this test method is used to assess the suitability of materials for contributing to an appropriate curing environment for concrete. The laboratory test method is used both in formulating and in specifying or qualifying curing products. This test method gives the user a measure of the ability of tested curing materials to impede the escape of moisture from a hydraulic cement mortar. Since it is desirable to retain moisture in fresh concrete to promote the hydration process, failure of the product to minimize the escape of moisture may lead to loss of strength, cracking, shrinkage, or low abrasion resistance of the hardened concrete, or a combination thereof.
Many factors affect the laboratory test results. Test results obtained may be highly variable as indicated by the precision statement. Critical factors include the precision of the control of the temperature, humidity and air circulation in the curing cabinet, preparation and sealing of the mortar specimens, the age and surface condition of the mortar specimen when the curing product is applied, and the uniformity and quantity of application of the curing membrane.
SCOPE
1.1 This test method covers laboratory determination of the efficiency of liquid membrane-forming compounds 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 standard. The values given in parentheses are mathematical conversions to inch-pound units that are provided for information only and are not considered standard.
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.)
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Designation:C156–09
Standard Test Method for
Water Retention by Liquid Membrane-Forming Curing
1
Compounds for Concrete
This standard is issued under the fixed designation C156; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of last revision.Anumber in parentheses indicates the year of last reapproval.A
superscript epsilon (´) 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* D1475 Test Method For Density of Liquid Coatings, Inks,
and Related Products
1.1 This test method covers laboratory determination of the
D1653 Test Methods for Water Vapor Transmission of
efficiency of liquid membrane-forming compounds for curing
Organic Coating Films
concrete, as measured by their ability to reduce moisture loss
D2369 Test Method for Volatile Content of Coatings
during the early hardening period.
E178 Practice for Dealing With Outlying Observations
1.2 The values stated in SI units are to be regarded as
standard. The values given in parentheses are mathematical
3. Significance and Use
conversions to inch-pound units that are provided for informa-
3.1 The moisture retaining ability of a product as deter-
tion only and are not considered standard.
mined by this test method is used to assess the suitability of
1.3 This standard does not purport to address all of the
materialsforcontributingtoanappropriatecuringenvironment
safety concerns, if any, associated with its use. It is the
for concrete. The laboratory test method is used both in
responsibility of the user of this standard to establish appro-
formulating and in specifying or qualifying curing products.
priate safety and health practices and determine the applica-
This test method gives the user a measure of the ability of
bility of regulatory limitations prior to use.(Warning—Fresh
tested curing materials to impede the escape of moisture from
hydraulic cementitious mixtures are caustic and may cause
2
a hydraulic cement mortar. Since it is desirable to retain
chemical burns to skin and tissue upon prolonged exposure.)
moisture in fresh concrete to promote the hydration process,
2. Referenced Documents failure of the product to minimize the escape of moisture may
3
lead to loss of strength, cracking, shrinkage, or low abrasion
2.1 ASTM Standards:
resistance of the hardened concrete, or a combination thereof.
C87 Test Method for Effect of Organic Impurities in Fine
3.2 Many factors affect the laboratory test results. Test
Aggregate on Strength of Mortar
results obtained may be highly variable as indicated by the
C150 Specification for Portland Cement
precisionstatement.Criticalfactorsincludetheprecisionofthe
C230/C230M Specification for Flow Table for Use in Tests
control of the temperature, humidity and air circulation in the
of Hydraulic Cement
curing cabinet, preparation and sealing of the mortar speci-
C305 Practice for Mechanical Mixing of Hydraulic Cement
mens, the age and surface condition of the mortar specimen
Pastes and Mortars of Plastic Consistency
when the curing product is applied, and the uniformity and
C778 Specification for Standard Sand
quantity of application of the curing membrane.
4. Apparatus
1
This test method is under the jurisdiction of ASTM Committee C09 on
4.1 Mechanical Mortar Mixer, as described in Practice
ConcreteandConcreteAggregates andisthedirectresponsibilityofSubcommittee
C09.22 on Materials Applied to New Concrete Surfaces.
C305, or a larger size mixture operating on the same principle.
Current edition approved Nov. 1, 2009. Published December 2009. Originally
4.2 Flow Table, as described in Specification C230/C230M.
approved in 1940. Last previous edition approved in 2005 as C156–05. DOI:
4.3 Molds shall be made of metal, glass, hard rubber, or
10.1520/C0156-09.
2
plastic, and shall be watertight and rigidly constructed to
Section on Safety Precautions, Manual of Aggregate and Concrete Testing,
Annual Book of ASTM Standards, Vol 04.02.
preventdistortionduringmoldingofthespecimensorhandling
3
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
of the mold containing fresh mortar. They shall have a
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
2 2
minimum surface area of 12000 mm (18.6 in. ), and a
Standards volume information, refer to the standard’s Document Summary page on
3
the ASTM website. minimum depth of 19 mm ( ⁄4 in.). The top surface shall be
*A Summary of Changes section appears at the end of this standard.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.
1
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C156–09
NOTE 3—Tissue embedding wax, readily ava
...
This document is not anASTM standard and is intended only to provide the user of anASTM standard an indication of what changes have been made to the previous version. Because
it may not be technically possible to adequately depict all changes accurately, ASTM recommends that users consult prior editions as appropriate. In all cases only the current version
of the standard as published by ASTM is to be considered the official document.
Designation:C156–05 Designation:C156–09
Standard Test Method for
Water Retention by Liquid Membrane-Forming Curing
1
Compounds for Concrete
This standard is issued under the fixed designation C156; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of last revision.Anumber in parentheses indicates the year of last reapproval.A
superscript epsilon (´) 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*
1.1 This test method covers laboratory determination of the efficiency of liquid membrane-forming compounds for curing
concrete, as measured by their ability to reduce moisture loss during the early hardening period.
1.2ThevaluesstatedinSIunitsaretoberegardedasthestandard.Thevaluesgiveninparenthesesareprovidedforinformation
purposes only.
1.2 The values stated in SI units are to be regarded as standard. The values given in parentheses are mathematical conversions
to inch-pound units that are provided for information only and are not considered standard.
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
2
tissue upon prolonged exposure.)
2. Referenced Documents
3
2.1 ASTM Standards:
C87 Test Method for Effect of Organic Impurities in Fine Aggregate on Strength of Mortar
C150 Specification for Portland Cement
C230/C230M Specification for Flow Table for Use in Tests of Hydraulic Cement
C305 Practice for Mechanical Mixing of Hydraulic Cement Pastes and Mortars of Plastic Consistency
C778 Specification for Standard Sand
D1475 Test Method For Density of Liquid Coatings, Inks, and Related Products
D1653 Test Methods for Water Vapor Transmission of Organic Coating Films
D2369 Test Method for Volatile Content of Coatings
E178 Practice for Dealing With Outlying Observations
3. Significance and Use
3.1 The moisture retaining ability of a product as determined by this test method is used to assess the suitability of materials
for contributing to an appropriate curing environment for concrete. The laboratory test method is used both in formulating and in
specifying or qualifying curing products. This test method gives the user a measure of the ability of tested curing materials to
impedetheescapeofmoisturefromahydrauliccementmortar.Sinceitisdesirabletoretainmoistureinfreshconcretetopromote
the hydration process, failure of the product to minimize the escape of moisture may lead to loss of strength, cracking, shrinkage,
or low abrasion resistance of the hardened concrete, or a combination thereof.
3.2 Many factors affect the laboratory test results. Test results obtained may be highly variable as indicated by the precision
statement.Criticalfactorsincludetheprecisionofthecontrolofthetemperature,humidityandaircirculationinthecuringcabinet,
preparation and sealing of the mortar specimens, the age and surface condition of the mortar specimen when the curing product
is applied, and the uniformity and quantity of application of the curing membrane.
1
This test method is under the jurisdiction ofASTM Committee C09 on Concrete and ConcreteAggregates and is the direct responsibility of Subcommittee C09.22 on
Materials Applied to New Concrete Surfaces.
Current edition approved Nov. 1, 2005.2009. Published November 2005.December 2009. Originally approved in 1940. Last previous edition approved in 20032005 as
C156–035. DOI: 10.1520/C0156-059.
2
Section on Safety Precautions, Manual of Aggregate and Concrete Testing, Annual Book of ASTM Standards, Vol 04.02.
3
ForreferencedASTMstandards,visittheASTMwebsite,www.astm.org,orcontactASTMCustomerServiceatservice@astm.org.ForAnnualBookofASTMStandards
volume information, refer to the standard’s Document Summary page on the ASTM website.
*A Summary of Changes section appears at the end of this standard.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.
1
---------------------- Page: 1 ----------------------
C156–09
4. Apparatus
4.1 Mechanical Mortar Mixer, as described in Practice C305, or a larger size mixture operating on the same principle.
4.2 Flow Table, as described in Specification
...
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