ASTM_D_173_-_D_173M_-_03_2011e1.pdf

Designation:D173/D173M03(Reapproved 2011)1Standard Specification forBitumen-Saturated Cotton Fabrics Used in Roofing andWaterproofing1This standard is issued under the fixed designation D173/D173M;the number immediately following the designation indicates the yearof 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.This standard has been approved for use by agencies of the Department of Defense.This standard replaces Federal Specification SS-C-450.1NOTEUnits information was editorially corrected in January 2012.1.Scope1.1 This specification covers woven cotton fabrics saturatedwith either asphalt or coal-tar pitch intended to be used withasphalts conforming to Specifications D312 or D449,coal-tarpitches conforming to Specification D450,or appropriatesolvent bearing bituminous materials in the construction ofroofing and waterproofing systems.1.1.1 Asphalt-saturated cotton fabric shall be used withasphalt base plying cement;typical ones are mopping asphaltsconforming to Specifications D312 or D449 or appropriatesolvent bearing asphaltic compounds.1.1.2 Coal-tar-saturated cotton fabric shall be used withcoal-tar based plying cements;a typical one is coal-tar pitchconforming to Specification D450 or appropriate solvent bear-ing coal-tar compounds.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 non-conformancewith the standard.2.Referenced Documents2.1 ASTM Standards:2D146 Test Methods for Sampling and Testing Bitumen-Saturated Felts and Woven Fabrics for Roofing andWaterproofingD312 Specification for Asphalt Used in RoofingD449 Specification for Asphalt Used in Dampproofing andWaterproofingD450 Specification for Coal-Tar Pitch Used in Roofing,Dampproofing,and WaterproofingD1079 Terminology Relating to Roofing and WaterproofingD3775 Test Method for Warp(End)and Filling(Pick)Countof Woven Fabrics3.Terminology3.1 DefinitionsFor definitions of terms used in this speci-fication,refer to Terminology D1079.4.Materials and Manufacture4.1 In the process of manufacture,the dry cotton fabric shallbe thoroughly and uniformly saturated with bitumen.This shallbe accomplished by passing the fabric through the saturant orby spraying with saturant,calendering in the presence of heat,and then cooling before winding on a core.4.2 If fabric with a selvage is used,the selvage shall not bemore than 16 mm 58in.wide.4.3 The fabric shall be woven entirely from cotton fibers,but customary sizing materials not exceeding 8%by weight ofthe moisture-free cotton shall be permitted to be used.5.Physical Properties5.1 The material shall conform to the physical requirementsprescribed in Table 1 and the dimensions and masses pre-scribed in Table 2.5.2 The finished product shall not crack nor be so sticky asto cause tearing or other damage upon being unrolled attemperatures between 10 and 60C 50 and 140F.6.Workmanship,Finish,and Appearance6.1 The meshes of the fabric shall not be completely closedor sealed by the process of saturation.There shall be sufficientporosity maintained to allow successive moppings of theplying cement to seep through.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 Nov.1,2011.Published January 2012.Originallyapproved in 1923.Last previous edition approved in 2003 as D173 03.DOI:10.1520/D0173_D0173M-03R11E01.2For 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 States1 6.2 The surface of the fabric shall not be coated or coveredwith talc or other substances that would tend to interfere withadhesion between the fabric and the plying cement.The use ofsilica or wood flour is permissible.6.3 The surface shall be uniformly smooth and free ofirregularities,folds,or knots.6.4 The finished material shall be free of visible externaldefects such as ragged or untrue edges,breaks,rents,or cracks.7.Sampling and Test Methods7.1 Sample the material and determine compliance withthese specifications in accordance with Test Methods D146.7.2 Determine the pliability of the saturated fabric at 0C32F by bending over a 1.6-mm 116-in.diameter mandrelthrough an arc of 180 in one direction and then through 360in the opposite direction.7.3 Determine the thread count in accordance with TestMethod D3775.8.I