ASTM_D_6924_-_03_2017.pdf

Designation:D692403(Reapproved 2017)Standard Specification forPreformed Thermoplastic Vulcanizate Elastomeric JointSeals for Bridges1This standard is issued under the fixed designation D6924;the number immediately following the designation indicates the year oforiginal adoption or,in the case of 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 the material requirements forpreformed thermoplastic vulcanizate(TPV)elastomeric jointseals for bridges.The seal consists of a multiple-web designcomposed of a TPV and functions only by compression of theseal between the faces of the joint with the seal folding inwardat the top to facilitate compression.The seal is installed with alubricant adhesive and is designed to seal the joint and rejectincompressibles.NOTE1This specification may not be applicable for seals whoseheight is less than 90%of its nominal width.1.2 The values stated in inch-pound units are to be regardedas the standard.The values given in parentheses are providedfor information only.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 and health practices and determine the applica-bility of regulatory requirements 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:2D395 Test Methods for Rubber PropertyCompression SetD412 Test Methods for Vulcanized Rubber and Thermoplas-tic ElastomersTensionD518 Test Method for Rubber DeteriorationSurfaceCracking(Withdrawn 2007)3D573 Test Method for RubberDeterioration in an AirOvenD575 Test Methods for Rubber Properties in CompressionD1149 Test Methods for Rubber DeteriorationCracking inan Ozone Controlled EnvironmentD2240 Test Method for Rubber PropertyDurometer Hard-nessD4483 Practice for Evaluating Precision for Test MethodStandards in the Rubber and Carbon Black ManufacturingIndustriesD6338 Classification System for Highly Crosslinked Ther-moplastic Vulcanizates(HCTPVs)Based on ASTM Stan-dard Test Methods3.Marking and Ordering Information3.1 Each lot of seal shall be marked with characters of notless than 0.25 in.(6.35 mm)in height on the top of the seal ata maximum of 4-ft(1.22-m)intervals showing the lot number,date of manufacture,and the manufacturing seal designation.3.2 The purchaser shall specify the anticipated requiredminimum acceptable joint movement,and either the minimumjoint opening,or the nominal width of seal.4.Materials and Manufacture4.1 The seals shall be preformed,and the material shall bevulcanized elastomeric compound using a thermoplastic vul-canizate as the compound.A thermoplastic vulcanizate is ablend of a crosslinked rubber and a thermoplastic polymer thatcan be processed on conventional thermoplastic processingmachinery and has the properties of a crosslinked elastomer.Highly crosslinked thermoplastic elastomers are classifiedaccording to Classification System D6338.TPV materials aremade in the dynamic vulcanization process.One example of atypical TPV is crosslinked ethylene propylene diene rubberblended with polypropylene.The TPV material can alsocontain processing oils,antioxidants,fillers,or other additives.1This specification is under the jurisdiction of ASTM Committee D04 on Roadand Paving Materials and is the direct responsibility of Subcommittee D04.34 onPreformed Joint Fillers,Sealers and Sealing Systems.Current edition approved July 1,2017.Published July 2017.Originally approvedin 2003.Last previous edition approved in 2012 as D6924 03(2012).DOI:10.1520/D6924-03R17.2For 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.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 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.1 5.Physical Requirements5.1 The materials shall conform to the physical propertiesprescribed in Table 1.5.2 In the applicable requirements of Table 1 and the testmethods,all deflection shall be based on the nominal widt