1、Designation:D6878/D6878M13Standard Specification forThermoplastic Polyolefin Based Sheet Roofing1This standard is issued under the fixed designation D6878/D6878M;the number immediately following the designation indicates theyear of original adoption or,in the case of revision,the year of last revisi
2、on.A number in parentheses indicates the year of lastreapproval.A superscript epsilon()indicates an editorial change since the last revision or reapproval.1.Scope1.1 This specification covers flexible sheet made fromthermoplastic polyolefin(TPO)as the principal polymer,intended for use in single-ply
3、 roofing membranes exposed tothe weather.The sheet shall contain reinforcing fabrics orscrims.1.2 The tests and property limits used to characterize thesheet are values intended to ensure minimum quality for theintended purpose.In-place roof system design criteria,such asfire resistance,field seamin
4、g strength,material compatibility,and uplift resistance,among others,are factors which should beconsidered but are beyond the scope of this specification.1.3 The values stated in either SI units or inch-pound unitsare to be regarded separately as standard.The values stated ineach system may not be e
5、xact equivalents;therefore,eachsystem shall be used independently of the other.Combiningvalues from the two systems may result in non-conformancewith the standard.1.4 This standard may involve hazardous materials,operations,and equipment.This standard does not purport toaddress all of the safety con
6、cerns,if any,associated with itsuse.It is the responsibility of the user of this standard toestablish appropriate safety and health practices and deter-mine the applicability of regulatory requirements prior to use.2.Referenced Documents2.1 ASTM Standards:2D471 Test Method for Rubber PropertyEffect
7、of LiquidsD573 Test Method for RubberDeterioration in an AirOvenD751 Test Methods for Coated FabricsD1149 Test Methods for Rubber DeteriorationCracking inan Ozone Controlled EnvironmentD1204 Test Method for Linear Dimensional Changes ofNonrigid Thermoplastic Sheeting or Film at ElevatedTemperatureD2
8、137 Test Methods for Rubber PropertyBrittleness Pointof Flexible Polymers and Coated FabricsD5538 PracticeforThermoplasticElastomersTerminology and AbbreviationsD7635/D7635M Test Method for Measurement of Thicknessof Coatings Over Fabric ReinforcementG151 Practice for Exposing Nonmetallic Materials
9、inAccel-erated Test Devices that Use Laboratory Light SourcesG155 Practice for Operating Xenon Arc Light Apparatus forExposure of Non-Metallic Materials3.Materials and Manufacture3.1 The sheet shall be formulated from ethylene and higheralpha-olefin polymers,copolymers,and mixtures thereof,inamounts
10、 greater than 50%,by weight of the total polymercontent suitably compounded to satisfy the physical require-ments in the specification(see Practice D5538).3.2 The sheet shall be capable of being heat welded,fused,or adhesively bonded to itself for making watertight fieldsplices and repairs,and the s
11、upplier or fabricator shall recom-mend suitable methods and materials.3.3 Sheet shall be reinforced with fabric or scrim.4.Physical Properties and Tolerances4.1 Each sheet specimen shall meet or exceed the physicalrequirements prescribed in Table 1.4.2 The tolerance for time conditions(aging,weather
12、ing,and so forth)is 615 min or 61%of the period,whichever isgreater,unless otherwise specified.4.3 The tolerance for temperature conditions(aging,weathering,and so forth)is 62C 64F of the specifiedtemperature,unless otherwise specified.5.Dimensions and Permissible Variations5.1 The width and length
13、of the sheet shall be agreed uponbetween the purchaser and the supplier.5.1.1 The width and length tolerance shall be+3%,0%.5.1.2 The thickness tolerance shall be+15%,10%ofthickness agreed upon by the purchaser and supplier,but in nocase shall it be less than the minimum in Table 1.1This specificati
14、on is under the jurisdiction of ASTM Committee D08 onRoofing and Waterproofing and is the direct responsibility of Subcommittee D08.18on Nonbituminous Organic Roof Coverings.Current edition approved Dec.15,2013.Published December 2013.Originallyapproved in 2003.Last previous edition approved in 2011
15、 as D6878/D6878M 11a.DOI:10.1520/D6878_D6878M-13.2For 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 website.Copyright ASTM In
16、ternational,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.United States1 5.1.3 The thickness of coating over scrim(reinforcingfabric)of the weathering side shall be at least 30%of theoverall thickness as agreed upon by the purchaser and supplier,but in no case shall it be less than the minimum in Table 1.Thetable below can be used as a reference for commonly usedthicknesses.Overall Thickness,mm in.Thickness of Coating Over Scrim,min,mm in.1.1 0.0450.38 0.0151.5 0.0600.48 0.01
