1、Designation: C957/C957M 10Standard Specification forHigh-Solids Content, Cold Liquid-Applied ElastomericWaterproofing Membrane With Integral Wearing Surface1This standard is issued under the fixed designation C957/C957M; the number immediately following the designation indicates the yearof original
2、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. Scope1.1 This specification describes the required properties andtest methods
3、 for a cold liquid-applied elastomeric membranefor waterproofing building decks not subject to hydrostaticpressure. The specification applies only to a membrane systemthat has an integral wearing surface. This specification does notinclude specific requirements for skid resistance or fire retar-danc
4、e, 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 inhigh-abrasion applications. The membrane may be single- ormulti-component, and may consist of one or more coats (forexample base coat
5、, top coat, etc.). The coat(s) may be built tothe desired thickness in one or more applications. One coat(base coat) provides the primary waterproofing function andnormally comprises the major amount of organic material inthe membrane. The function of the top coat(s) is to resist wearand weather. Ag
6、gregate may be used as a component of themembrane system, as all or part of a course, to increase wearand skid resistance.1.3 The committee with jurisdiction over this standard is notaware of any comparable standards published by other orga-nizations.1.4 Test methods in this specification require a
7、minimum0.5-mm 0.020-in. base coat dry film thickness. Actual thick-ness required for a particular application and the use ofaggregate in topcoats shall be established by the membranemanufacturer.1.5 The values stated in either SI units or inch-pound unitsare to be regarded separately as standard. Th
8、e values stated ineach system may not be exact equivalents; therefore, eachsystem shall be used independently of the other. Combiningvalues from the two systems may result in non-conformancewith the standard.1.6 The following safety hazards caveat pertains only to thetest method portion, Section 5,
9、of this specification: Thisstandard does not purport to address all of the safety problems,if any, associated with its use. It is the responsibility of the userof this standard to establish appropriate safety and healthpractices and determine the applicability of regulatory limita-tions prior to use
10、.2. Referenced Documents2.1 ASTM Standards:2C501 Test Method for Relative Resistance to Wear ofUnglazed Ceramic Tile by the Taber AbraserC717 Terminology of Building Seals and SealantsC794 Test Method for Adhesion-in-Peel of ElastomericJoint SealantsC1250 Test Method for Nonvolatile Content of ColdL
11、iquid-Applied Elastomeric Waterproofing MembranesC1305 Test Method for Crack Bridging Ability of Liquid-Applied Waterproofing MembraneC1442 Practice for Conducting Tests on Sealants UsingArtificial Weathering ApparatusD412 Test Methods for Vulcanized Rubber and Thermo-plastic ElastomersTensionD471 T
12、est Method for Rubber PropertyEffect of LiquidsD609 Practice for Preparation of Cold-Rolled Steel Panelsfor Testing Paint, Varnish, Conversion Coatings, andRelated Coating ProductsD1133 Test Method for Kauri-Butanol Value of Hydrocar-bon SolventsD2370 Test Method for Tensile Properties of Organic Co
13、at-ingsG113 Terminology Relating to Natural andArtificial Weath-ering Tests of Nonmetallic Materials1This specification is under the jurisdiction of ASTM Committee D08 onRoofing and Waterproofing and is the direct responsibility of Subcommittee D08.22on Waterproofing and Dampproofing Systems.Current
14、 edition approved May 1, 2010. Published May 2010. Originallyapproved in 1981. Last previous edition approved in 2006 as C957 06. DOI:10.1520/C0957_C0957M-10.2For referenced ASTM standards, visit the ASTM website, www.astm.org, orcontact ASTM Customer Service at serviceastm.org. For Annual Book of A
15、STMStandards volume information, refer to the standards Document Summary page onthe ASTM website.1Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.2.2 U.S. Department of Commerce Standard:Product Standard PS-1, Construction and Industr
16、ial Ply-wood33. Terminology3.1 DefinitionsRefer to Terminology C717 for definitionsof terms used in this guide.3.2 The definitions given in Terminology G113 for termsrelated to natural and artificial weathering tests are applicableto this specification.4. Physical Requirements4.1 MaterialMembrane ma
17、terials shall cure, after appli-cation by spreading or spraying, to form an elastomeric filmsystem composed of one or more layers and capable ofmaintaining a seal against water despite the existence ordevelopment of small (1.6 mm 116 in. maximum) cracks inthe substrate. It must maintain complete int
18、egrity under pedes-trian or vehicular traffic.4.2 The physical, mechanical, and performance propertiesof the membrane shall conform to the requirements describedin Table 1.5. Test Methods5.1 Standard ConditionsStandard conditions for all testsshall be 23 6 2C 70 to 77F and 50 6 5 % relativehumidity:
19、5.2 Conditioning and Mixing:5.2.1 Store all membrane materials to be tested in anunopened container at standard conditions for at least 24 hbefore preparing any test specimens.5.2.2 Follow the manufacturers instructions for all mixingand preparation of membrane materials.5.3 SubstratesIn addition to
20、 the substrates specifiedherein, conduct tests on such other substrates as may berequired by the specifier.5.4 PrimerWhen required by the manufacturer, use aprimer, as directed by the manufacturer, on all substratematerials in all test assemblies.5.5 Low-Temperature Crack BridgingPerform the test as
21、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. Totalthickness of the cured membrane, excluding aggregate, shall bea minimum of 0.5 mm 0.020 in.5.5.2 Extend the blocks until the
22、 space between each is 1.6mm 116 in. rather than 3.2 mm 18 in.5.6 Adhesion-in-Peel after Water ImmersionPerform thetest as specified in Test Method C794 with the followingqualifications:5.6.1 Cement mortar shall be used as the test substrate.Additional substrates, such as plywood, shall be used when
23、specified.5.6.2 Test only the base coat and any primer.5.6.3 Cast the base coat in the thickness specified by themanufacturer for one coat of the base coat, or the wet-filmthickness necessary to attain a dry-film thickness of 0.5 mm0.020 in., whichever is greater. Follow the instructions of themanuf
24、acturer regarding the time of placement of the airplanecloth or aluminum screen.5.6.4 For testing on plywood, use the A side of ExteriorType Marine Grade AA, AB, or AC plywood conforming toU.S. Department of Commerce, Plywood Standard PS-1 as thesubstrate.5.6.5 The sample shall be cured 2 weeks at s
25、tandardconditions followed by 1 week at 70C 158F.5.7 Chemical ResistancePerform the test for change intensile strength as specified in Test Method D471, with thefollowing qualifications:5.7.1 Cast test samples of the base coat to a minimum curedthickness of 0.5 mm 0.020 in. in accordance with thedir
26、ections of the manufacturer. Test any required top coatsseparately from the base coat. Cast the top coat test samplesaccording to Method A of Test Methods D412 or, in the case ofcoatings thinner than 0.16 mm 6.25 mils, by Test MethodD2370.5.7.2 Cure all test samples for 3 weeks at standard condi-tio
27、ns.5.7.3 For each test liquid, cut at least five dumbbells asspecified in Method A of Test Methods D412, using Die C. Inaddition, cut and retain ten dumbbells as a control.3Available from Superintendent of Documents, U.S. Government PrintingOffice, Washington, DC 20402.TABLE 1 RequirementsProperty R
28、equirement Test MethodWeight loss of base coat,Amax, % 40 C1250Low temperature crack bridging No cracking in base coat C1305 as modified in 5.5 of this specificationAdhesion-in-peel after water immersion, min, N lbf C794 as modified in 5.6 of this specificationCement mortar substrate 22.2 5Plywood s
29、ubstrate 13.3 3Chemical resistance, min, avg % tensile retention D471 as modified in 5.7 of this specificationWater exposure 70Ethylene glycol exposure 70Mineral spirits exposure 45Weathering resistance and recovery from elongation, min, % 5.8 of this specificationRecovery from elongation, initial 9
30、0Tensile retention 80Elongation retention 90Abrasion resistance, max, mg oz. 50 0.002 C501 as modified in 5.9 of this specificationStability, min, months 6 5.10 of this specificationAA separate top coat or primer, or both, if required by manufacturer, shall comply with the manufacturers specificatio
31、ns.C957/C957M 1025.7.4 The test liquids shall be water, ethylene glycol, andmineral spirits of Kauri Butanol Value 33 to 35, as determinedby Test Method D1133.5.7.5 Immerse the test samples in test liquids for 336 h (14days). Liquid temperature shall be 23 6 1C 73 6 2F. Agethe ten control dumbbells
32、under standard conditions for 2weeks.5.7.6 Test the dumbbells and calculate the tensile propertiesas specified in Test Methods D412. Make the crosshead speed500 mm 20 in./min, and set the jaws 51 mm 2 in. apart. Ifan extensiometer is used, make its gage length 25 6 0.25 mm1.00 6 0.01 in.5.7.7 Determ
33、ine tensile and elongation retention as follows:TR 5PtPc3 100 (1)where:TR = percent retention of tensile property,Pt= property after test exposure, andPc= property of the control.5.8 Weathering Resistance and Recovery from Elongation:5.8.1 Cast a free film of the total membrane system,excluding any
34、aggregate, on release paper or other suitablesubstrate specified by the manufacturer to a minimum curedthickness of 0.5 mm 0.020 in., of sufficient size to provide atleast twenty dumbbell-shaped samples as specified in TestMethods D412, Die C.5.8.2 Cure the film 21 days at standard conditions follow
35、edby 7 days at 70 6 2C 158 6 4F in a circulating hot-airoven.5.8.3 Cut 20 dumbbell specimens, as specified in TestMethods D412, Die C from the cured film. Ten specimens areweathered as described in 5.8.4 and 5.8.5 and ten specimensare retained as unexposed file specimens.5.8.4 Expose the ten specime
36、ns in one of the three types oflaboratory accelerated weathering devices described in PracticeC1442. The devices use either xenon arc, fluorescent UV, oropen flame carbon arc radiation. Consult Practice C1442 forthe test parameters. Because of differences in type of lightsource and test conditions,
37、test results may differ with the typeof device used. The choice of device shall be by mutualagreement among the interested parties.5.8.5 Expose the ten specimens for a minimum of 500 h.The exposure duration shall be sufficiently long to screen forproducts with unacceptable weather resistance. The re
38、quiredduration may differ with the type of weathering device used.For the xenon arc device, the radiant exposure is 500 h at anirradiance level of 0.51 W/(m2nm) at 340 nm is 917.5kJ/(m2nm) at 340 nm. See Annex A1 in Practice C1442 fordetermining the exposure time required to obtain the sameradiant e
39、xposure at other irradiance levels.5.8.6 After weathering, allow the specified samples toequilibrate for at least 24 h under standard conditions. Set thejaws of the tension tester 51 mm 2 in. apart. Place the benchmarks on the sample pieces, as specified in Test MethodsD412. Following the specified
40、procedures, test the samplepieces for tensile strength and elongation, using a crossheadspeed of 500 mm 20 in./min. Allow them to recover for 30min and measure elongation after recovery. Determine recov-ery as follows:R 5EB EREB3 100 (2)where:R = percent recovery,EB= percent elongation at break, and
41、ER= percent elongation after recovery.Tensile and elongation retention are defined in 5.7.7.5.9 Abrasion ResistancePerform the test as specified inTest Method C501, with the following qualifications:5.9.1 Cast test samples of the entire membrane excludingaggregate to a minimum total cured thickness
42、of 0.5 mm 0.020in. on a 102 mm 4-in. square steel panel 3 mm 0.125 in.thick with a 6.33-mm 14-in. hole drilled in the center. Preparepanels as specified in Practice D609. Steel shall be Type 3.Preparation shall be Method D.5.9.2 Cure the samples 14 days at standard conditionsfollowed by 7 days at 70
43、 6 2C 158 6 4F in a circulatinghot-air oven.5.9.3 Run test for 1000 cycles using 1000-g weight and theCS-17 abrasion wheel.5.10 StabilityWhen stored at a temperature not exceeding27C 80F in a dry environment, or kept protected frommoisture, or both, the membrane material shall be capable ofmeeting t
44、he requirements of this specification for at least sixmonths from the time of production.6. Rejection and Resubmittal6.1 Failure to conform to any one of the requirementsprescribed in this specification shall constitute grounds forrejection. The seller shall have the right to reinspect therejected s
45、hipment and resubmit the lot after removal of thosepackages not conforming to the specified requirements.7. Packaging and Product Marking7.1 The date of production shall be marked on each pack-age.7.2 Unless otherwise specified in the contract or order, thematerial shall be packaged in standard comm
46、ercial containersconstructed so as to ensure acceptance by common or othercarrier for safe transportation to the point of delivery. Shippingcontainers shall be marked with the name, type, and quantity ofthe material contained therein, as defined by the contract ororder under which the shipments are
47、made.8. Report8.1 The test report shall include a brief description of thesystem tested including thicknesses of layers of material,substrates used on and whether a primer was used.8.2 Report type and description of laboratory acceleratedweathering device, test cycle, test parameters, and duration o
48、fexposure.9. Keywords9.1 liquid-applied; membrane; waterproofingC957/C957M 103ASTM International takes no position respecting the validity of any patent rights asserted in connection with any item mentionedin this standard. Users of this standard are expressly advised that determination of the valid
49、ity of any such patent rights, and the riskof infringement of such rights, are entirely their own responsibility.This standard is subject to revision at any time by the responsible technical committee and must be reviewed every five years andif not revised, either reapproved or withdrawn. Your comments are invited either for revision of this standard or for additional standardsand should be addressed to ASTM International Headquarters. Your comments will receive careful consideration at
