1、Designation: C957/C957M 14C957/C957M 15Standard 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 yea
2、rof 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. Scope1.1 This specification describes the required properties an
3、d test methods for a cold liquid-applied elastomeric membrane forwaterproofing building decks not subject to hydrostatic pressure. The specification applies only to a membrane system that has anintegral wearing surface. This specification does not include specific requirements for skid resistance or
4、 fire retardance, althoughboth 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-abrasionapplications. The membrane may be single- or multi-component, and may consist of one or more coats (for ex
5、ample 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 theprimary waterproofing function and normally comprises the major amount of organic material in the membrane. The function ofthe top coat(s) is to resist wea
6、r and weather. Aggregate may be used as a component of the membrane system, as all or part of acourse, to increase wear and skid resistance.1.3 The committee with jurisdiction over this standard is not aware of any comparable standards published by otherorganizations.1.4 Test methods in this specifi
7、cation require a minimum 0.5-mm 0.020-in. base coat dry film thickness. Actual thicknessrequired 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 separat
8、ely as standard. The values stated in eachsystem may not be exact equivalents; therefore, each system shall be used independently of the other. Combining values from thetwo systems may result in non-conformance with the standard.1.6 The following safety hazards caveat pertains only to the test metho
9、d portion, Section 5, of this specification:This standarddoes not purport to address all of the safety problems, if any, associated with its use. It is the responsibility of the user of thisstandard to establish appropriate safety and health practices and determine the applicability of regulatory li
10、mitations prior to use.2. Referenced Documents2.1 ASTM Standards:2C501 Test Method for Relative Resistance to Wear of Unglazed Ceramic Tile by the Taber AbraserC794 Test Method for Adhesion-in-Peel of Elastomeric Joint SealantsC1250 Test Method for Nonvolatile Content of Cold Liquid-Applied Elastome
11、ric Waterproofing MembranesC1305 Test Method for Crack Bridging Ability of Liquid-Applied Waterproofing MembraneC1442 Practice for Conducting Tests on Sealants Using Artificial Weathering ApparatusD412 Test Methods for Vulcanized Rubber and Thermoplastic ElastomersTensionD471 Test Method for Rubber
12、PropertyEffect of LiquidsD609 Practice for Preparation of Cold-Rolled Steel Panels for Testing Paint, Varnish, Conversion Coatings, and Related CoatingProductsD1079 Terminology Relating to Roofing and WaterproofingD1133 Test Method for Kauri-Butanol Value of Hydrocarbon Solvents1 This specification
13、is under the jurisdiction of ASTM Committee D08 on Roofing and Waterproofing and is the direct responsibility of Subcommittee D08.25 on LiquidApplied Polymeric Materials Used for Roofing and Waterproofing Membranes that are Directly Exposed to the Weather.Current edition approved Nov. 1, 2014Jan. 1,
14、 2015. Published December 2014January 2015. Originally approved in 1981. Last previous edition approved in 20102014as C957/C957M 10.C957/C957M 14. DOI: 10.1520/C0957_C0957M-14.10.1520/C0957_C0957M-15.2 For referencedASTM standards, visit theASTM website, www.astm.org, or contactASTM Customer Service
15、 at serviceastm.org. For Annual Book of ASTM Standardsvolume information, refer to the standards Document Summary page on the ASTM website.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 v
16、ersion. Becauseit 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 versionof the standard as published by ASTM is to be considered the official document.Copyright ASTM Internat
17、ional, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States1D2370 Test Method for Tensile Properties of Organic CoatingsD6511 Test Methods for Solvent Bearing Bituminous CompoundsG113 Terminology Relating to Natural and Artificial Weathering Tests of Nonmetallic Materi
18、alsC957/C957M 1522.2 U.S. Department of Commerce Standard:Product Standard PS-1, Construction and Industrial Plywood33. Terminology3.1 DefinitionsRefer to Terminology D1079 for definitions of terms used in this guide.3.2 The definitions given in Terminology G113 for terms related to natural and arti
19、ficial weathering tests are applicable to thisspecification.4. Physical Requirements4.1 MaterialMembrane materials shall cure, after application by spreading or spraying, to form an elastomeric film systemcomposed of one or more layers and capable of maintaining a seal against water despite the exis
20、tence or development of small (1.6mm 116 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 inTable 1.5. Test Methods5.1 S
21、tandard ConditionsStandard conditions for all tests shall be 23 6 2C 70 to 77F 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 preparingany test specimens.5.2.2 Follow
22、the manufacturers instructions for all mixing and preparation of membrane materials.5.3 SubstratesIn addition to the substrates specified herein, conduct tests on such other substrates as may be required by thespecifier.5.4 PrimerWhen required by the manufacturer, use a primer, as directed by the ma
23、nufacturer, on all substrate materials in alltest assemblies.5.5 Low-Temperature Crack BridgingPerform 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 thickne
24、ssof the cured membrane, excluding aggregate, shall be a minimum of 0.5 mm 0.020 in.5.5.2 Extend the blocks until the space between each is 1.6 mm 116 in. rather than 3.2 mm 18 in.5.6 Adhesion-in-Peel after Water ImmersionPerform the test as specified in Test Method C794 with the followingqualificat
25、ions: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 thick
26、nessnecessary to attain a dry-film thickness of 0.5 mm 0.020 in., whichever is greater. Follow the instructions of the manufacturerregarding the time of placement of the airplane cloth or aluminum screen.3 Available from Superintendent of Documents, U.S. Government Printing Office, Washington, DC 20
27、402.TABLE 1 RequirementsProperty Requirement Test MethodWeight loss of base coat,A max, % 40 C1250Weight loss of base coat,A max, % 40 D6511 as modified in 5.11Low temperature crack bridging No cracking in base coat C1305 as modified in 5.5 of this specificationAdhesion-in-peel after water immersion
28、, min, N lbf C794 as modified in 5.6 of this specificationCement mortar substrate 22.2 5Plywood substrate 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
29、and recovery from elongation,min, %5.8 of this specificationRecovery from elongation, initial 90Tensile 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 specificationA A separate top coat o
30、r primer, or both, if required by manufacturer, shall comply with the manufacturers specifications.C957/C957M 1535.6.4 For testing on plywood, use the A side of Exterior Type Marine Grade AA, AB, or AC plywood conforming to U.S.Department of Commerce, Plywood Standard PS-1 as the substrate.5.6.5 The
31、 sample shall be cured 2 weeks at standard conditions followed by 1 week at 70C 158F.5.7 Chemical ResistancePerform the test for change in tensile strength as specified in Test Method D471, with the followingqualifications:5.7.1 Cast test samples of the base coat to a minimum cured thickness of 0.5
32、mm 0.020 in. in accordance with the directionsof the manufacturer. Test any required top coats separately from the base coat. Cast the top coat test samples according to MethodA of Test Methods D412 or, in the case of coatings thinner than 0.16 mm 6.25 mils, by Test Method D2370.5.7.2 Cure all test
33、samples for 3 weeks at standard conditions.5.7.3 For each test liquid, cut at least five dumbbells as specified in Method A of Test Methods D412, using Die C. In addition,cut and retain ten dumbbells as a control.5.7.4 The test liquids shall be water, ethylene glycol, and mineral spirits of Kauri Bu
34、tanol Value 33 to 35, as determined by TestMethod D1133.5.7.5 Immerse the test samples in test liquids for 336 h (14 days). Liquid temperature shall be 23 6 1C 73 6 2F. Age theten control dumbbells under standard conditions for 2 weeks.5.7.6 Test the dumbbells and calculate the tensile properties as
35、 specified in Test Methods D412. Make the crosshead speed 500mm 20 in./min, and set the jaws 51 mm 2 in. apart. If an extensiometer is used, make its gage length 25 6 0.25 mm 1.00 60.01 in.5.7.7 Determine tensile and elongation retention as follows:TR5PtPc3100 (1)where:TR = percent retention of tens
36、ile 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 aggregate, on release paper or other suitable substratespecified by the manufacturer to a minimum
37、cured thickness of 0.5 mm 0.020 in., of sufficient size to provide at least twentydumbbell-shaped samples as specified in Test Methods D412, Die C.5.8.2 Cure the film 21 days at standard conditions followed by 7 days at 70 6 2C 158 6 4F in a circulating hot-air oven.5.8.3 Cut 20 dumbbell specimens,
38、as specified in Test Methods D412, Die C from the cured film. Ten specimens are weatheredas described in 5.8.4 and 5.8.5 and ten specimens are retained as unexposed file specimens.5.8.4 Expose the ten specimens in one of the three types of laboratory accelerated weathering devices described in Pract
39、iceC1442. The devices use either xenon arc, fluorescent UV, or open flame carbon arc radiation. Consult Practice C1442 for the testparameters. Because of differences in type of light source and test conditions, test results may differ with the type of device used.The choice of device shall be by mut
40、ual agreement 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 for productswith unacceptable weather resistance. The required duration may differ with the type of weathering device used. For the xenon arcde
41、vice, the radiant exposure is 500 h at an irradiance level of 0.51 W/(m2nm) at 340 nm is 917.5 kJ/(m2nm) at 340 nm. SeeAnnexA1 in Practice C1442 for determining the exposure time required to obtain the same radiant exposure at other irradiance levels.5.8.6 After weathering, allow the specified sampl
42、es to equilibrate for at least 24 h under standard conditions. Set the jaws ofthe tension tester 51 mm 2 in. apart. Place the bench marks on the sample pieces, as specified in Test Methods D412. Followingthe specified procedures, test the sample pieces for tensile strength and elongation, using a cr
43、osshead speed of 500 mm 20 in./min.Allow them to recover for 30 min and measure elongation after recovery. Determine recovery as follows:R5EB 2EREB3100 (2)where:R = percent recovery,EB = percent elongation at break, andER = percent elongation after recovery.Tensile and elongation retention are defin
44、ed in 5.7.7.5.9 Abrasion ResistancePerform the test as specified in Test Method C501, with the following qualifications:5.9.1 Cast test samples of the entire membrane excluding aggregate to a minimum total cured thickness of 0.5 mm 0.020 in.on a 102 mm 4-in. square steel panel 3 mm 0.125 in. thick w
45、ith a 6.33-mm 14-in. hole drilled in the center. Prepare panelsas specified in Practice D609. Steel shall be Type 3. Preparation shall be Method D.C957/C957M 1545.9.2 Cure the samples 14 days at standard conditions followed by 7 days at 7062C 15864F in a circulating hot-air oven.5.9.3 Run test for 1
46、000 cycles using 1000-g weight and the CS-17 abrasion wheel.5.10 StabilityWhen stored at a temperature not exceeding 27C 80F in a dry environment, or kept protected from moisture,or both, the membrane material shall be capable of meeting the requirements of this specification for at least six months
47、 from thetime of production.5.11 Test in compliance with the requirements of Test Method D6511, Section 7; utilize a forced draft oven controlled to 70 62C 158 6 3.6F for 72 h. Remove the specimens from the oven and allow to cool at standard conditions for 30 minutes priorto weighing samples.6. Reje
48、ction and Resubmittal6.1 Failure to conform to any one of the requirements prescribed in this specification shall constitute grounds for rejection. Theseller shall have the right to reinspect the rejected shipment and resubmit the lot after removal of those packages not conformingto the specified re
49、quirements.7. Packaging and Product Marking7.1 The date of production shall be marked on each package.7.2 Unless otherwise specified in the contract or order, the material shall be packaged in standard commercial containersconstructed so as to ensure acceptance by common or other carrier for safe transportation to the point of delivery. Shippingcontainers shall be marked with the name, type, and quantity of the material contained therein, as defined by the contract or orderunder
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