ASTM_D_8138_-_18.pdf

Designation:D813818Standard Specification forPreformed Silicone Joint Sealing System for Bridges1This standard is issued under the fixed designation D8138;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 silicone joint seals for bridges.The seal consists ofa silicone rubber gland preformed to a continuous length.Itsdesign shall prevent any tension from occurring in the seal orbonding point during normal movement.The seal is installedby bonding it to the joint header with a silicone-based adhesiveand is designed to seal the joint,preventing liquid intrusion.1.2 The values given in parentheses are mathematical con-versions to SI units that are provided for information only andare not considered 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:2C639 Test Method for Rheological(Flow)Properties ofElastomeric SealantsC679 Test Method for Tack-Free Time of Elastomeric Seal-antsC793 Test Method for Effects of Laboratory AcceleratedWeathering on Elastomeric Joint SealantsD395 Test Methods for Rubber PropertyCompression SetD412 Test Methods for Vulcanized Rubber and Thermoplas-tic ElastomersTensionD573 Test Method for RubberDeterioration in an AirOvenD624 Test Method for Tear Strength of Conventional Vul-canized Rubber and Thermoplastic ElastomersD2240 Test Method for Rubber PropertyDurometer Hard-ness3.Materials and Manufacture3.1 The seals shall be preformed to a continuous length,andthe material shall be silicone rubber.3.2 The adhesive shall be a silicone-based adhesive.4.Physical Requirements4.1 The materials for the seal shall conform to the physicalproperties prescribed in Table 1.4.2 The materials for the adhesive shall conform to thephysical properties prescribed in Table 2.4.3 In the applicable requirements of Table 1 and the testmethod,all deflection shall be based on the nominal width.5.Dimensions and Working Parameters5.1 The size,shape,and dimensional tolerances shall be asoutlined in 5.2.5.2 Measurements used for physical laboratory testing shallbe taken to the nearest 0.01 in.(0.3 mm)and reported/recordedto the nearest 0.1 in.(3 mm)as the average of the measure-ments.The measured width shall be greater than or equal to thenominal width.Measurements shall be taken at quarter pointsof the sample.5.3 The lengths of samples for performance testing purposesshall be 2 ft 6 0.25 in.(601 6 6 mm)length for the seal andappropriate amount of silicone-based adhesive per manufac-turers recommendation.6.Sampling6.1 Samples shall be taken at random from each shipment ofmaterial.If the shipment consists of more than one lot,each lotshall be sampled.6.2 A lot shall consist of the quantity for each copioussection agreed upon between the purchaser and the supplier.1This specification is under the jurisdiction of ASTM Committee D04 on Roadand Paving Materials and is the direct responsibility of Subcommittee D04.32 onBridges and Structures.Current edition approved April 1,2018.Published April 2018.Originallyapproved in 2018.DOI:10.1520/D8138-18.2For 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.1 7.Specimen Preparation7.1 All tests in Tables 1 and 2 shall be done in accordancewith the referenced ASTM test method.7.2 All performance test specimens cut shall be square towithin 2 and smooth,with no roughness visible to the nakedeye and cleaned of debris.This process will eliminate irregu-larities.The 2-ft(601-mm)long test specimens shall be fullyinstalled with the adhesive per manufacturer recommendationson a ste