ASTM_D_2178_-_D_2178M_-_15a_2021.pdf

Designation:D2178/D2178M15a(Reapproved 2021)Standard Specification forAsphalt Glass Felt Used in Roofing and Waterproofing1This standard is issued under the fixed designation D2178/D2178M;the number immediately following the designation indicates theyear of original adoption or,in the case of revision,the year of last revision.A number in parentheses indicates the year of lastreapproval.A superscript epsilon()indicates an editorial change since the last revision or reapproval.This standard has been approved for use by agencies of the U.S.Department of Defense.1.Scope1.1 This specification covers glass felts impregnated tovarying degrees with asphalt intended to be used with asphaltsconforming to the requirements of Specification D312/D312Mor D7654/D7654M in the construction of built-up roofs,andwith asphalts conforming to the requirements of SpecificationD449/D449M in the construction of waterproofing systems.1.2 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 exact equivalents;therefore,eachsystem shall be used independently of the other.Combiningvalues from the two systems may result in nonconformancewith the standard.1.3 This standard does not purport to address all of thesafety concerns,if any,associated with its use.It is theresponsibility of the user of this standard to establish appro-priate safety,health,and environmental practices and deter-mine the applicability of regulatory limitations prior to use.1.4 This international standard was developed in accor-dance with internationally recognized principles on standard-ization established in the Decision on Principles for theDevelopment of International Standards,Guides and Recom-mendations issued by the World Trade Organization TechnicalBarriers to Trade(TBT)Committee.2.Referenced Documents2.1 ASTM Standards:2D146/D146M Test Methods for Sampling and TestingBitumen-Saturated Felts and Woven Fabrics for Roofingand WaterproofingD312/D312M Specification for Asphalt Used in RoofingD449/D449M Specification forAsphalt Used in Dampproof-ing and WaterproofingD1079 Terminology Relating to Roofing and WaterproofingD7654/D7654M Specification for Asphalt Used in RoofingMeasured by Dynamic Shear Rheometer3.Terminology3.1 Definitions:3.1.1 For definitions of terms used in this specification,referto Terminology D1079.3.2 Definitions of Terms Specific to This Standard:3.2.1 net dry massthe mass of the asphalt-impregnatedglass felt exclusive of wrapping and packing material,afterdrying to constant weight and after removing all detachedcomminuted surfacing material as described in 8.2.4.Classification4.1 Asphalt-impregnated glass felts Types IV and VI arecovered by this specification.5.Materials and Manufacture5.1 The felt shall be a thin,porous sheet of uniformlydistributed glass fibers,with or without the addition of rein-forcing stranded glass yarns,and bonded with a water-resistantresinous binder.5.2 In the process of manufacture,the felt shall be impreg-nated with asphalt which shall be permitted to contain amineral stabilizer so that the individual glass fibers are coatedand the asphalt is evenly distributed throughout.5.3 The impregnated glass felt shall be surfaced with amaterial to prevent sticking in the roll.The nature and quantityof the surfacing material shall not interfere with adhesionbetween the plies of a membrane.6.Physical Properties,Dimensions,Masses,andPermissible Variations6.1 The finished product shall conform to the physicalproperties,dimensions,masses,and permissible variations asprescribed in Tables 1 and 2.6.2 The finished product shall not crack nor be so sticky asto cause tearing or other damage upon being unrolled attemperatures between 10 and 60 C 50 and 140 F.1This specification is under the jurisdiction of ASTM Committee D08 onRoofing and Waterproofing and is the direct responsibility of Subcommittee D08.04on Felts,Fabrics and Bituminous Sheet Materials.Current edition approved July 1,2021.Published July 2021.Originally approvedin 1963.Last previous edition approved in 2015 as D2178/D2178M 15a.DOI:10.1520/D2178_D2178M-15AR21.2For 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 International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.United StatesThis international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for theDevelopment of International Standards,Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade(TBT)Committee.16.3 After extraction of the asphalt in accordance withSection 16 of Test Methods D146/D146M,the desaturated feltshall remain flat and unbuckled,shall retain its original shapeand d