ASTM C957/C957M-14
(Specification)Standard Specification for High-Solids Content, Cold Liquid-Applied Elastomeric Waterproofing Membrane With Integral Wearing Surface
Standard Specification for High-Solids Content, Cold Liquid-Applied Elastomeric Waterproofing Membrane With Integral Wearing Surface
ABSTRACT
This specification describes the required properties and test methods for high-solids content, cold liquid-applied elastomeric membrane with integral wearing surface for waterproofing building decks not subject to hydrostatic pressure. This specification does not include specific requirements for skid resistance or fire retardance, although both may be important in specific uses. The properties to which the materials will be tested upon for conformance are as follows: weight loss of base coat; low temperature crack bridging; adhesion-in-peel to cement mortar and plywood substrates after water immersion; chemical resistance after water, ethylene glycol, and mineral spirits exposure; weathering resistance, recovery from elongation, tensile retention, and elongation retention; abrasion resistance; and stability.
SCOPE
1.1 This specification describes the required properties and test methods for a cold liquid-applied elastomeric membrane for waterproofing building decks not subject to hydrostatic pressure. The specification applies only to a membrane system that has an integral wearing surface. This specification does not include specific requirements for skid resistance or fire retardance, although both may be important in specific uses.
1.2 The type of membrane system described in this specification is used for pedestrian and vehicular traffic and in high-abrasion applications. The membrane may be single- or multi-component, and may consist of one or more coats (for example base coat, top coat, etc.). The coat(s) may be built to the desired thickness in one or more applications. One coat (base coat) provides the primary waterproofing function and normally comprises the major amount of organic material in the membrane. The function of the top coat(s) is to resist wear and weather. Aggregate may be used as a component of the membrane system, as all or part of a course, to increase wear and skid resistance.
1.3 The committee with jurisdiction over this standard is not aware of any comparable standards published by other organizations.
1.4 Test methods in this specification require a minimum 0.5-mm [0.020-in.] base coat dry film thickness. Actual thickness required for a particular application and the use of aggregate in topcoats shall be established by the membrane manufacturer.
1.5 The values stated in either SI units or inch-pound units are to be regarded separately as standard. The values stated 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 non-conformance with the standard.
1.6 The following safety hazards caveat pertains only to the test method portion, Section 5, of this specification: This standard does not purport to address all of the safety problems, 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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Designation:C957/C957M −14
StandardSpecification for
High-Solids Content, Cold Liquid-Applied Elastomeric
Waterproofing Membrane With Integral Wearing Surface
This standard is issued under the fixed designation C957/C957M; 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 (´) indicates an editorial change since the last revision or reapproval.
1. Scope 1.6 The following safety hazards caveat pertains only to the
test method portion, Section 5, of this specification:This
1.1 This specification describes the required properties and
standard does not purport to address all of the safety problems,
test methods for a cold liquid-applied elastomeric membrane
if any, associated with its use. It is the responsibility of the user
for waterproofing building decks not subject to hydrostatic
of this standard to establish appropriate safety and health
pressure. The specification applies only to a membrane system
practices and determine the applicability of regulatory limita-
thathasanintegralwearingsurface.Thisspecificationdoesnot
tions prior to use.
include specific requirements for skid resistance or fire
retardance, although both may be important in specific uses.
2. Referenced Documents
1.2 The type of membrane system described in this speci- 2
2.1 ASTM Standards:
fication is used for pedestrian and vehicular traffic and in
C501 Test Method for Relative Resistance to Wear of
high-abrasion applications. The membrane may be single- or
Unglazed Ceramic Tile by the Taber Abraser
multi-component, and may consist of one or more coats (for
C794 Test Method forAdhesion-in-Peel of Elastomeric Joint
example base coat, top coat, etc.). The coat(s) may be built to
Sealants
the desired thickness in one or more applications. One coat
C1250 Test Method for Nonvolatile Content of Cold Liquid-
(base coat) provides the primary waterproofing function and
Applied Elastomeric Waterproofing Membranes
normally comprises the major amount of organic material in
C1305 Test Method for Crack Bridging Ability of Liquid-
the membrane. The function of the top coat(s) is to resist wear
Applied Waterproofing Membrane
and weather. Aggregate may be used as a component of the
C1442 Practice for Conducting Tests on Sealants Using
membrane system, as all or part of a course, to increase wear
Artificial Weathering Apparatus
and skid resistance.
D412 Test Methods forVulcanized Rubber andThermoplas-
1.3 Thecommitteewithjurisdictionoverthisstandardisnot tic Elastomers—Tension
aware of any comparable standards published by other orga- D471 Test Method for Rubber Property—Effect of Liquids
nizations. D609 Practice for Preparation of Cold-Rolled Steel Panels
for Testing Paint, Varnish, Conversion Coatings, and
1.4 Test methods in this specification require a minimum
Related Coating Products
0.5-mm [0.020-in.] base coat dry film thickness. Actual thick-
D1079 Terminology Relating to Roofing and Waterproofing
ness required for a particular application and the use of
D1133 Test Method for Kauri-Butanol Value of Hydrocar-
aggregate in topcoats shall be established by the membrane
bon Solvents
manufacturer.
D2370 Test Method for Tensile Properties of Organic Coat-
1.5 The values stated in either SI units or inch-pound units
ings
are to be regarded separately as standard. The values stated in
G113 Terminology Relating to Natural andArtificial Weath-
each system may not be exact equivalents; therefore, each
ering Tests of Nonmetallic Materials
system shall be used independently of the other. Combining
values from the two systems may result in non-conformance
with the standard.
This specification is under the jurisdiction of ASTM Committee D08 on
Roofing and Waterproofing and is the direct responsibility of Subcommittee D08.25
on Liquid Applied Polymeric Materials Used for Roofing and Waterproofing
Membranes that are Directly Exposed to the Weather. For referenced ASTM standards, visit the ASTM website, www.astm.org, or
Current edition approved Nov. 1, 2014. Published December 2014. Originally contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
approved in 1981. Last previous edition approved in 2010 as C957/C957M – 10. Standards volume information, refer to the standard’s Document Summary page on
DOI: 10.1520/C0957_C0957M-14. the ASTM website.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
C957/C957M−14
2.2 U.S. Department of Commerce Standard: 5.4 Primer—When required by the manufacturer, use a
Product Standard PS-1, Construction and Industrial Ply- primer, as directed by the manufacturer, on all substrate
wood materials in all test assemblies.
5.5 Low-Temperature Crack Bridging—Perform the test as
3. Terminology
specified in Test Method C1305 with the following exceptions.
3.1 Definitions—Refer to Terminology D1079 for defini-
5.5.1 Test the total membrane system (primers, base coat(s)
tions of terms used in this guide.
and top coat(s)) including any aggregate specified. Total
thicknessofthecuredmembrane,excludingaggregate,shallbe
3.2 The definitions given in Terminology G113 for terms
a minimum of 0.5 mm [0.020 in.].
related to natural and artificial weathering tests are applicable
5.5.2 Extend the blocks until the space between each is 1.6
to this specification.
1 1
mm [ ⁄16 in.] rather than 3.2 mm [ ⁄8 in.].
4. Physical Requirements
5.6 Adhesion-in-Peel after Water Immersion—Perform the
4.1 Material—Membrane materials shall cure, after appli-
test as specified in Test Method C794 with the following
cation by spreading or spraying, to form an elastomeric film
qualifications:
system composed of one or more layers and capable of
5.6.1 Cement mortar shall be used as the test substrate.
maintaining a seal against water despite the existence or
Additional substrates, such as plywood, shall be used when
development of small (1.6 mm [ ⁄16 in.] maximum) cracks in
specified.
the substrate. It must maintain complete integrity under pedes-
5.6.2 Test only the base coat and any primer.
trian or vehicular traffic.
5.6.3 Cast the base coat in the thickness specified by the
manufacturer for one coat of the base coat, or the wet-film
4.2 The physical, mechanical, and performance properties
thickness necessary to attain a dry-film thickness of 0.5 mm
of the membrane shall conform to the requirements described
[0.020 in.], whichever is greater. Follow the instructions of the
in Table 1.
manufacturer regarding the time of placement of the airplane
5. Test Methods
cloth or aluminum screen.
5.6.4 For testing on plywood, use the A side of Exterior
5.1 Standard Conditions—Standard conditions for all tests
Type Marine Grade AA, AB, or AC plywood conforming to
shall be 23 6 2°C [70 to 77°F] and 50 6 5 % relative
U.S. Department of Commerce, Plywood Standard PS-1 as the
humidity:
substrate.
5.2 Conditioning and Mixing:
5.6.5 The sample shall be cured 2 weeks at standard
5.2.1 Store all membrane materials to be tested in an
conditions followed by 1 week at 70°C [158°F].
unopened container at standard conditions for at least 24 h
5.7 Chemical Resistance—Perform the test for change in
before preparing any test specimens.
tensile strength as specified in Test Method D471, with the
5.2.2 Follow the manufacturer’s instructions for all mixing
following qualifications:
and preparation of membrane materials.
5.7.1 Cast test samples of the base coat to a minimum cured
5.3 Substrates—In addition to the substrates specified
thickness of 0.5 mm [0.020 in.] in accordance with the
herein, conduct tests on such other substrates as may be
directions of the manufacturer. Test any required top coats
required by the specifier.
separately from the base coat. Cast the top coat test samples
according to MethodAofTest Methods D412 or, in the case of
coatings thinner than 0.16 mm [6.25 mils], by Test Method
Available from Superintendent
...
This document is not an ASTM standard and is intended only to provide the user of an ASTM 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: C957/C957M − 10 C957/C957M − 14
Standard Specification for
High-Solids Content, Cold Liquid-Applied Elastomeric
Waterproofing Membrane With Integral Wearing Surface
This standard is issued under the fixed designation C957/C957M; 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 (´) indicates an editorial change since the last revision or reapproval.
1. Scope
1.1 This specification describes the required properties and test methods for a cold liquid-applied elastomeric membrane for
waterproofing building decks not subject to hydrostatic pressure. The specification applies only to a membrane system that has an
integral wearing surface. This specification does not include specific requirements for skid resistance or fire retardance, although
both may be important in specific uses.
1.2 The type of membrane system described in this specification is used for pedestrian and vehicular traffic and in high-abrasion
applications. The membrane may be single- or multi-component, and may consist of one or more coats (for example base coat,
top coat, etc.). The coat(s) may be built to the desired thickness in one or more applications. One coat (base coat) provides the
primary waterproofing function and normally comprises the major amount of organic material in the membrane. The function of
the top coat(s) is to resist wear and weather. Aggregate may be used as a component of the membrane system, as all or part of a
course, to increase wear and skid resistance.
1.3 The committee with jurisdiction over this standard is not aware of any comparable standards published by other
organizations.
1.4 Test methods in this specification require a minimum 0.5-mm [0.020-in.] base coat dry film thickness. Actual thickness
required for a particular application and the use of aggregate in topcoats shall be established by the membrane manufacturer.
1.5 The values stated in either SI units or inch-pound units are to be regarded separately as standard. The values stated 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 non-conformance with the standard.
1.6 The following safety hazards caveat pertains only to the test method portion, Section 5, of this specification:This standard
does not purport to address all of the safety problems, 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.
2. Referenced Documents
2.1 ASTM Standards:
C501 Test Method for Relative Resistance to Wear of Unglazed Ceramic Tile by the Taber Abraser
C717 Terminology of Building Seals and Sealants
C794 Test Method for Adhesion-in-Peel of Elastomeric Joint Sealants
C1250 Test Method for Nonvolatile Content of Cold Liquid-Applied Elastomeric Waterproofing Membranes
C1305 Test Method for Crack Bridging Ability of Liquid-Applied Waterproofing Membrane
C1442 Practice for Conducting Tests on Sealants Using Artificial Weathering Apparatus
D412 Test Methods for Vulcanized Rubber and Thermoplastic Elastomers—Tension
D471 Test Method for Rubber Property—Effect of Liquids
D609 Practice for Preparation of Cold-Rolled Steel Panels for Testing Paint, Varnish, Conversion Coatings, and Related Coating
Products
D1079 Terminology Relating to Roofing and Waterproofing
This specification is under the jurisdiction of ASTM Committee D08 on Roofing and Waterproofing and is the direct responsibility of Subcommittee D08.25 on Liquid
Applied Polymeric Materials Used for Roofing and Waterproofing Membranes that are Directly Exposed to the Weather.
Current edition approved May 1, 2010Nov. 1, 2014. Published May 2010December 2014. Originally approved in 1981. Last previous edition approved in 20062010 as
C957 – 06.C957/C957M – 10. DOI: 10.1520/C0957_C0957M-10.10.1520/C0957_C0957M-14.
For referenced ASTM standards, visit the ASTM website, www.astm.org, or contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM Standards
volume information, refer to the standard’s Document Summary page on the ASTM website.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
C957/C957M − 14
D1133 Test Method for Kauri-Butanol Value of Hydrocarbon Solvents
D2370 Test Method for Tensile Properties of Organic Coatings
G113 Terminology Relating to Natural and Artificial Weathering Tests of Nonmetallic Materials
C957/C957M − 14
2.2 U.S. Department of Commerce Standard:
Product Standard PS-1, Construction and Industrial Plywood
3. Terminology
3.1 Definitions—Refer to Terminology C717D1079 for definitions of terms used in this guide.
3.2 The definitions given in Terminology G113 for terms related to natural and artificial weathering tests are applicable to this
specification.
4. Physical Requirements
4.1 Material—Membrane materials shall cure, after application by spreading or spraying, to form an elastomeric film system
composed of one or more layers and capable of maintaining a seal against water despite the existence or development of small (1.6
mm [ ⁄16 in.] maximum) cracks in the substrate. It must maintain complete integrity under pedestrian or vehicular traffic.
4.2 The physical, mechanical, and performance properties of the membrane shall conform to the requirements described in
Table 1.
5. Test Methods
5.1 Standard Conditions—Standard conditions for all tests shall be 23 6 2°C [70 to 77°F] and 50 6 5 % relative humidity:
5.2 Conditioning and Mixing:
5.2.1 Store all membrane materials to be tested in an unopened container at standard conditions for at least 24 h before preparing
any test specimens.
5.2.2 Follow the manufacturer’s instructions for all mixing and preparation of membrane materials.
5.3 Substrates—In addition to the substrates specified herein, conduct tests on such other substrates as may be required by the
specifier.
5.4 Primer—When required by the manufacturer, use a primer, as directed by the manufacturer, on all substrate materials in all
test assemblies.
5.5 Low-Temperature Crack Bridging—Perform the test as specified in Test Method C1305 with the following exceptions.
5.5.1 Test the total membrane system (primers, base coat(s) and top coat(s)) including any aggregate specified. Total thickness
of the cured membrane, excluding aggregate, shall be a minimum of 0.5 mm [0.020 in.].
1 1
5.5.2 Extend the blocks until the space between each is 1.6 mm [ ⁄16 in.] rather than 3.2 mm [ ⁄8 in.].
5.6 Adhesion-in-Peel after Water Immersion—Perform the test as specified in Test Method C794 with the following
qualifications:
5.6.1 Cement mortar shall be used as the test substrate. Additional substrates, such as plywood, shall be used when specified.
5.6.2 Test only the base coat and any primer.
5.6.3 Cast the base coat in the thickness specified by the manufacturer for one coat of the base coat, or the wet-film thickness
necessary to attain a dry-film thickness of 0.5 mm [0.020 in.], whichever is greater. Follow the instructions of the manufacturer
regarding the time of placement of the airplane cloth or aluminum screen.
Available from Superintendent of Documents, U.S. Government Printing Office, Washington, DC 20402.
TABLE 1 Requirements
Property Requirement Test Method
A
Weight loss of base coat, max, % 40 C1250
Low temperature crack bridging No cracking in base coat C1305 as modified in 5.5 of this specification
Adhesion-in-peel after water immersion, min, N [lbf] C794 as modified in 5.6 of this specification
Cement mortar substrate 22.2 [5]
Plywood substrate 13.3 [3]
Chemical resistance, min, avg % tensile retention D471 as modified in 5.7 of this specification
Water exposure 70
Ethylene glycol
...
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