1、Designation: E 1745 97 (Reapproved 2004)Standard Specification forPlastic Water Vapor Retarders Used in Contact with Soil orGranular Fill under Concrete Slabs1This standard is issued under the fixed designation E 1745; the number immediately following the designation indicates the year oforiginal ad
2、option or, in the case of revision, the year of last revision. A number in parentheses indicates the year of last reapproval. Asuperscript epsilon (e) indicates an editorial change since the last revision or reapproval.1. Scope1.1 This specification covers flexible, preformed sheetmembrane materials
3、 to be used as vapor retarders in contactwith soil or granular fill under concrete slabs.1.1.1 A task group in Subcommittee E06.21 is working on aspecification for bituminous vapor retarders.1.2 The specified tests are conducted on new materials andmaterials that have been conditioned or exposed to
4、simulatepotential service conditions.2. Referenced Documents2.1 ASTM Standards:2C 168 Terminology Relating to Thermal Insulation Materi-alsD 828 Test Method for Tensile Properties of Paper andPaperboard Using Constant-Rate-of-Elongation ApparatusD 882 Test Methods for Tensile Properties of Thin Plas
5、ticSheetingD 1709 Test Methods for Impact Resistance of Plastic Filmby the Free-Falling Dart MethodE96 Test Methods for Water Vapor Transmission of Mate-rialsE 154 Test Methods for Water Vapor Retarders Used inContact with Earth under Concrete Slabs, on Walls, or asGround CoverE 631 Terminology of B
6、uilding ConstructionsF 1249 Test Method for Water Vapor Transmission RateThrough Plastic Film and Sheeting Using a ModulatedInfrared Sensor3. Terminology3.1 DefinitionsFor definitions of terms used in this speci-fication, see Terminologies C 168 and E 631.3.2 Definitions of Terms Specific to This St
7、andard:3.2.1 perm, nthe time rate of water vapor migrationthrough a material or a construction of one grain per hour,square 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 re
8、lationships:1 perm = 1 grain/h ft2in. Hg (inchpound)= 57.2 10;12kg/(Pasm2) (SI fundamental units)= 57.2 ng/(Pa s m2) (SI frequently used)= 0.66g/24hm2 mm Hg (SI has been used but is now obso-lete)3.2.2 vapor retarder, n(formerly vapor barrier) a materialor construction that impedes the transmission
9、of water vaporunder specified conditions.3.2.3 water vapor permeability, na property of materialwhich is water vapor permeance through unit thickness. Sincematerials that provide resistance to vapor flow are never usedin unit thickness, the preferred evaluation of both materials andconstructions is
10、the permeance.3.2.4 water-vapor permeance, nthe time rate of watervapor flow through unit area of the known thickness of a flatmaterial or a construction normal to two specific parallelsurfaces induced by unit vapor pressure difference between thetwo surfaces under specific temperature and humidity
11、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 the follo
12、wing: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).1This specification is under the jurisdiction of ASTM Committee E06 on
13、Performance of Buildings and is the direct responsibility of Subcommittee E06.21on Serviceability.Current edition approved May 1, 2004. Published May 2004. Originallyapproved in 1996. Last previous edition approved in 1997 as E 1745 97.2For referenced ASTM standards, visit the ASTM website, www.astm
14、.org, orcontact ASTM Customer Service at serviceastm.org. For Annual Book of ASTMStandards 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.6. Lap Sea
15、ling6.1 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 1 under the following conditions: when
16、tested inaccordance with Test Methods E 154, Section 7 (based on TestMethods E96) or Test Method F 1249, test temperature shallbe 73.4F (23C) and test humidity shall be 50 6 2%.7.1.1 Permeance of New MaterialNo conditioning.7.1.2 Permeance after Wetting, Drying, and SoakingRefer to Test Methods E 15
17、4, Section 8.7.1.3 Permeance after Heat ConditioningRefer to TestMethods E 154, Section 11.7.1.4 Permeance after Low Temperature ConditioningRefer to Test Methods E 154, Section 12.7.1.5 Permeance after Soil Organism ExposureRefer toTest Methods E 154, Section 13.7.2 Tensile Strength of New Material
18、Refer to Test Meth-ods E 154, Section 9. (The apparatus shall be that described ineither Test Method D 828 or Test Methods D 882.)7.3 Resistance to Puncture of New MaterialRefer to TestMethods D 1709, Method B.7.4 Special ConditionsWhen specifically required by thebuyer, due to special conditions wh
19、ich dictate properties of fireresistivity, prolonged exposure to sunlight, or resistance todeterioration from hydrocarbons, the material shall conform tothe following:7.4.1 Flame Spread3Refer to Test Methods E 154, Sec-tion 16, as follows:Class A 025Class B 2675Class C 762007.4.2 Permeance after Soi
20、l Poison Petroleum VehicleExposureRefer to Test Methods E 154, Section 14 (based onTest Methods E96). Conform to permeance requirements inTable 1.7.4.3 Permeance after Exposure to Ultraviolet LightReferto Test Methods E 154, Section 15. Conform to permeancerequirements in Table 1.8. Certification8.1
21、 When specified in the purchase order or contract, thepurchaser shall be furnished with certification that samplesrepresenting each lot have been either tested or inspected asdirected in this specification and that requirements have beenmet.8.2 Upon the request of the purchaser in the contract orord
22、er, the certification of an independent third party (testinglaboratory) indicating conformance to the requirements of thisspecification may be considered.8.3 When specified in the purchase order or contract, theproducer or supplier shall furnish a summary of the testprocedures listed in Table 1, pro
23、viding for each test thelaboratory that performed or witnessed the test, the date of themost recent test, and the test results.8.4 When specified in the purchase order or contract, theproducer or supplier shall furnish copies of the laboratoryreports for each of the tests listed in Table 1.9. Keywor
24、ds9.1 concrete slab; floor; concrete; plastic; vapor retarder3The classes and values shown are distinct from the performance classes listedin Table 1.TABLE 1 Properties for Specified Performance ClassesClass A Class B Class CUS Units SI Units US Units SI Units US Units SI UnitsWater vaporpermeance0.
25、3 perms 0.3 perms 0.3 perms(E 154, Section 7 orF 1249), max(0.3 gr/hft2in.Hg) (17 ng/sm2Pa) (0.3 gr/hft2inHg) (17 ng/sm2Pa) (0.3 gr/hft2in.Hg) (17 ng/sm2Pa)Tensile strength(E 154, Section9),Amin45.0 lbf/in. 7.9 kN/m 30.0 lbf/in. 5.3 kN/m 13.6 lbf/in. 2.4 kN/mPuncture resistance(D 1709, MethodB), min
26、no inch-poundequivalent used2200 g no inch-poundequivalent used1700 g no inch-poundequivalent used475 gATensile strength per unit width for the total sample thickness is used instead of tensile strength per unit area because vapor retarder materials are never used in unitthickness.E 1745 97 (2004)2A
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30、e on Standards, at the address shown below.This standard is copyrighted by ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959,United States. Individual reprints (single or multiple copies) of this standard may be obtained by contacting ASTM at the aboveaddress or at 610-832-9585 (phone), 610-832-9555 (fax), or serviceastm.org (e-mail); or through the ASTM website(www.astm.org).E 1745 97 (2004)3
