1、Designation: C957/C957M 15C957/C957M 17Standard 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 safety, health, and healthenvironmental practices and determine the a
10、pplicability ofregulatory limitations prior to use.1.7 This international standard was developed in accordance with internationally recognized principles on standardizationestablished in the Decision on Principles for the Development of International Standards, Guides and Recommendations issuedby th
11、e World Trade Organization Technical Barriers to Trade (TBT) Committee.2. Referenced Documents2.1 ASTM Standards:2C501 Test Method for Relative Resistance to Wear of Unglazed Ceramic Tile by the Taber AbraserC794C794 06 Test Method for Adhesion-in-Peel of Elastomeric Joint SealantsC1305C1305/C1305M
12、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 PropertyEffect of Liquids1 This s
13、pecification 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 Jan. 1
14、, 2015Oct. 1, 2017. Published January 2015October 2017. Originally approved in 1981. Last previous edition approved in 20142015 asC957/C957M 14.C957/C957M 15. DOI: 10.1520/C0957_C0957M-15.10.1520/C0957_C0957M-17.2 For referencedASTM standards, visit theASTM website, www.astm.org, or contactASTM Cust
15、omer Service 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 th
16、e previous version. 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 A
17、STM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States1D609 Practice for Preparation of Cold-Rolled Steel Panels for Testing Paint, Varnish, Conversion Coatings, and Related CoatingProductsD1079 Terminology Relating to Roofing and WaterproofingD1133 Te
18、st Method for Kauri-Butanol Value of Hydrocarbon SolventsD2370 Test Method for Tensile Properties of Organic CoatingsD6511D6511/D6511M Test Methods for Solvent Bearing Bituminous CompoundsG113 Terminology Relating to Natural and Artificial Weathering Tests of Nonmetallic MaterialsC957/C957M 1722.2 U
19、.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 artificial weathering test
20、s 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 existence or development o
21、f 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 Standard ConditionsStan
22、dard 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 the manufacturers inst
23、ructions 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 manufacturer, on all sub
24、strate materials in alltest assemblies.5.5 Low-Temperature Crack BridgingPerform the test as specified in Test Method C1305C1305/C1305M with the followingexceptions.5.5.1 Test the total membrane system (primers, base coat(s) and top coat(s) including any aggregate specified. Total thicknessof the cu
25、red 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 064 with the followingqualifications:5.
26、6.1 Cement mortar shall be used as the test substrate. Additional substrates, such as plywood, shall be used when specified.3 Available from Superintendent of Documents, U.S. Government Printing Office, Washington, DC 20402.4 The 2006 edition of Test Method C794 is suitable for testing liquid-applie
27、d membranes. Changes to Test Method C794 since then have optimized the standard for testingsealants but render it less useful for testing liquid-applied membranes. Test Method C794 06 is available for purchase at the ASTM website.TABLE 1 RequirementsProperty Requirement Test MethodWeight loss of bas
28、e coat,A max, % 40 D6511 as modified in 5.11Weight loss of base coat,A max, % 40 D6511/D6511M as modified in 5.11Low temperature crack bridging No cracking in base coat C1305 as modified in 5.5 of this specificationLow temperature crack bridging No cracking in base coat C1305/C1305M as modified in 5
29、.5 of this specifica-tionAdhesion-in-peel after water immersion, min, N lbf C794 06 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 g
30、lycol exposure 70Mineral spirits exposure 45Weathering resistance 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 specificationStabilit
31、y, min, months 6 5.10 of this specificationA A separate top coat or primer, or both, if required by manufacturer, shall comply with the manufacturers specifications.C957/C957M 1735.6.2 Test only the base coat and any primer.5.6.3 Cast the base coat in the thickness specified by the manufacturer for
32、one coat of the base coat, or the wet-film thicknessnecessary 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.5.6.4 For testing on plywood, use the A side of
33、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 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 sp
34、ecified 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 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 acco
35、rding 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 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
36、 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 Butanol 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 7
37、3 6 2F. Age theten control dumbbells under standard conditions for 2 weeks.5.7.6 Test the dumbbells and calculate the tensile properties as 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
38、 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 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
39、the total membrane system, excluding any aggregate, on release paper or other suitable substratespecified by the manufacturer to a minimum 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
40、 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, 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 unexpo
41、sed file specimens.5.8.4 Expose the ten specimens in one of the three types of laboratory accelerated weathering devices described in PracticeC1442. The devices use either xenon arc, fluorescent UV, or open flame carbon arc radiation. Consult Practice C1442 for the testparameters. Because of differe
42、nces 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 mutual 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
43、productswith unacceptable weather resistance. The required duration may differ with the type of weathering device used. For the xenon arcdevice, 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
44、the exposure time required to obtain the same radiant exposure at other irradiance levels.5.8.6 After weathering, allow the specified samples 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, a
45、s specified in Test Methods D412. Followingthe specified procedures, test the sample pieces for tensile strength and elongation, using a crosshead 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:
46、R = percent recovery,EB = percent elongation at break, andER = percent elongation after recovery.Tensile and elongation retention are defined in 5.7.7.C957/C957M 1745.9 Abrasion ResistancePerform the test as specified in Test Method C501, with the following qualifications:5.9.1 Cast test samples of
47、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 with 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.
48、5.9.2 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 1000 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 protec
49、ted from moisture,or both, the membrane material shall be capable of meeting the requirements of this specification for at least six months from thetime of production.5.11 Test in compliance with the requirements of Test Method D6511D6511/D6511M, Section 7; utilize a forced draft ovencontrolled to 70 6 2C 158 6 3.6F for 72 h. Remove the specimens from the oven and allow to cool at standard conditionsfor 30 minutes prior to weighing samples.6. Rejection and Resubmittal6.1
