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ASTM C957-C957M-17(1).pdf
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ASTM C957-C957M-17(1).pdf
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Designation: C957/C957M − 17
Standard Specification for
High-Solids Content, Cold Liquid-Applied Elastomeric
Waterproofing Membrane With Integral Wearing Surface
1
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 speci-
fication 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 orga-
nizations.
1.4 Test methods in this specification require a minimum
0.5-mm [0.020-in.] base coat dry film thickness. Actual thick-
ness 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, health, and
environmental practices and determine the applicability of
regulatory limitations prior to use.
1.7 This international standard was developed in accor-
dance with internationally recognized principles on standard-
ization established in the Decision on Principles for the
Development of International Standards, Guides and Recom-
mendations issued by the World Trade Organization Technical
Barriers to Trade (TBT) Committee.
2. Referenced Documents
2.1 ASTM Standards:
2
C501 Test Method for Relative Resistance to Wear of
Unglazed Ceramic Tile by the Taber Abraser
C794 – 06 Test Method for Adhesion-in-Peel of Elastomeric
Joint Sealants
C1305/C1305M 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 Thermoplas-
tic 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
D1133 Test Method for Kauri-Butanol Value of Hydrocar-
bon Solvents
D2370 Test Method for Tensile Properties of Organic Coat-
ings
D6511/D6511M Test Methods for Solvent Bearing Bitumi-
nous Compounds
1
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 Oct. 1, 2017. Published October 2017. Originally
approved in 1981. Last previous edition approved in 2015 as C957/C957M – 15.
DOI: 10.1520/C0957_C0957M-17.
2
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
This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the
Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.
1
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