1、Designation:E174511Standard Specification forPlastic Water Vapor Retarders Used in Contact with Soil orGranular Fill under Concrete Slabs1This standard is issued under the fixed designation E1745;the number immediately following the designation indicates the year oforiginal adoption or,in the case o
2、f revision,the year of last revision.A number in parentheses indicates the year of last reapproval.Asuperscript epsilon()indicates an editorial change since the last revision or reapproval.1.Scope1.1 This specification covers flexible,preformed sheetmembrane materials to be used as vapor retarders i
3、n contactwith soil or granular fill under concrete slabs.1.1.1 This specification does not cover bituminous vaporretarders.See Specification E1993 for information on bitumi-nous vapor retarders.1.2 The specified tests are conducted on new materials andmaterials that have been conditioned or exposed
4、to simulatepotential service conditions.1.3 The values stated in inch-pound units are to be regardedas standard.The values given in parentheses are mathematicalconversions to SI units that are provided for information onlyand are not considered standard.2.Referenced Documents2.1 ASTM Standards:2C168
5、 Terminology Relating to Thermal InsulationD828 Test Method for Tensile Properties of Paper andPaperboard Using Constant-Rate-of-ElongationApparatus(Withdrawn 2009)3D882 Test Method for Tensile Properties of Thin PlasticSheetingD1709 Test Methods for Impact Resistance of Plastic Filmby the Free-Fall
6、ing Dart MethodE96/E96M Test Methods for Water Vapor Transmission ofMaterialsE154 Test Methods for Water Vapor Retarders Used inContact with Earth Under Concrete Slabs,on Walls,or asGround CoverE631 Terminology of Building ConstructionsE1643 Practice for Selection,Design,Installation,and In-spection
7、 of Water Vapor Retarders Used in Contact withEarth or Granular Fill Under Concrete SlabsE1993 Specification for Bituminous Water Vapor RetardersUsed in Contact with Soil or Granular Fill Under ConcreteSlabsF1249 Test Method for Water Vapor Transmission RateThrough Plastic Film and Sheeting Using a
8、ModulatedInfrared Sensor3.Terminology3.1 DefinitionsFor definitions of terms used in thisspecification,see Terminologies C168 and E631.3.2 Definitions of Terms Specific to This Standard:3.2.1 perm,nthe time rate of water vapor migrationthrough a material or a construction of one grain per hour,squar
9、e foot,inch of mercury pressure difference.3.2.1.1 DiscussionIf a specification states that a one permlimit is required,the same flow rate will be obtained from thefollowing relationships:1 perm=1 grain/h ft2in.Hg(inchpound)=57.2 10;12kg/(Pa s m2)(SI fundamental units)=57.2 ng/(Pa s m2)(SI frequentl
10、y used)=0.66 g/24 h m2 mm Hg(SI has been used but is nowobsolete)3.2.2 vapor retarder,n(formerly vapor barrier)a materialor construction that impedes the transmission of water vaporunder specified conditions.3.2.3 water vapor permeability,na property of materialwhich is water vapor permeance through
11、 unit thickness.Sincematerials that provide resistance to vapor flow are never usedin unit thickness,the preferred evaluation of both materials andconstructions is the permeance.3.2.4 water-vapor permeance,nthe time rate of watervapor flow through unit area of the known thickness of a flatmaterial o
12、r a construction normal to two specific parallel1This specification is under the jurisdiction of ASTM Committee E06 onPerformance of Buildings and is the direct responsibility of Subcommittee E06.21on Serviceability.Current edition approved Oct.1,2011.Published October 2011.Originallyapproved in 199
13、6.Last previous edition approved in 2009 as E1745 09.DOI:10.1520/E1745-11.2For referenced ASTM standards,visit the ASTM website,www.astm.org,orcontact ASTM Customer Service at serviceastm.org.For Annual Book of ASTMStandards volume information,refer to the standards Document Summary page onthe ASTM
14、website.3The last approved version of this historical standard is referenced onwww.astm.org.Copyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.United States1 surfaces induced by unit vapor pressure difference between thetwo surfaces under specific temperat
15、ure and humidity condi-tions.See perm.4.Classification4.1 Materials shall be specified to conform to one of thesethree classes:A,B,or C,or specific requirements shall bespecified in one or more of the properties listed in Table 1.5.Specifying Information5.1 Specifications for materials shall include
16、 the following:5.1.1 This specification number.5.1.2 ClassA,B,or C,or alternatively,specific performancerequirements for each of the properties listed in Table 1.5.1.3 Performance requirements,if any,for special condi-tions(see 7.3).6.Lap Sealing6.1 The producer shall provide instructions for lap sealing,including minimum width of lap,method of sealing,and eithersupply or specify suitable products for lap sealing.7.Properties7.1 PermeanceMaterial shall conform to the requirementslisted in Table
