ASTM_E_1555_-_12.pdf

Designation:E155512Standard Specification forStructural Paste Adhesive for Sandwich Panel Repair1This standard is issued under the fixed designation E1555;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.This standard has been approved for use by agencies of the Department of Defense.1.Scope1.1 This specification defines those characteristics that arerequired of adhesives to be used in the repair of sandwichpanels for durable,rigidwall,relocatable structures.1.1.1 This specification covers two-part epoxy adhesivesuitable for bonding aluminum alloy facings to nonmetalliccore,core to core,and core to perimeter aluminum extrusionframe in the repair of durable rigidwall relocatable structures.The adhesive shall be suitable for forming bonds that willwithstand exposure to temperatures from 54 to 93C(65 to199F)and high relative humidity and will also withstand thecombinations of stress,temperature,and relative humidity thatare expected to be encountered in service.The adhesive shallalso be suitable for the bonding of panel inserts and edgeattachments.1.2 The values stated in SI units are to be regarded as thestandard where only SI units are given,or where SI units aregiven first followed by inch-pound units;where inch-poundunits are given first followed by SI units,the inch-pound unitsare to be regarded as the standard.1.3 The following safety hazards caveat pertains only to thetest methods described in this specification.This standard doesnot purport to address all of the safety concerns,if any,associated with its use.It is the responsibility of the user of thisstandard to establish appropriate safety and health practicesand determine the applicability of regulatory limitations priorto use.2.Referenced Documents2.1 ASTM Standards:2B209 Specification for Aluminum and Aluminum-AlloySheet and PlateD1002 Test Method for Apparent Shear Strength of Single-Lap-Joint Adhesively Bonded Metal Specimens by Ten-sion Loading(Metal-to-Metal)D1781 Test Method for Climbing Drum Peel for AdhesivesD2919 Test Method for Determining Durability of AdhesiveJoints Stressed in Shear by Tension LoadingE4 Practices for Force Verification of Testing MachinesE631 Terminology of Building ConstructionsE864 Practice for Surface Preparation of Aluminum Alloysto Be Adhesively Bonded in Honeycomb Shelter PanelsE1091 Specification for Nonmetallic Honeycomb Core forUse in Shelter PanelsE1749 Terminology Relating to Rigid Wall RelocatableShelters2.2 Federal Specifications:3MIL-STD-401 Sandwich Constructions and Core Materials;General Test MethodsQQ-A-250/8d Aluminum Alloy 5052 H34 Plate and SheetQQ-A-250/11d Aluminum Alloy 6061 T6 Plate and Sheet3.Terminology3.1 DefinitionsSee Terminologies E631 and E1749 fordefinitions of general terms used in this specification.4.Material4.1 The adhesive shall be a two-part thermosetting epoxypaste containing no asbestos and when tested using the testmethods described in Section 7,shall meet the requirements ofSection 5.The adhesive shall not have a deleterious effect onthe components being bonded over the range of temperatures atwhich the adhesive will be used.5.Physical Requirements5.1 Working Characteristics:5.1.1 ApplicationThe adhesive shall be suitable for appli-cation to facings and core materials.The adhesive shall not dripand shall not develop an overall average sag of 6.3 mm(0.25in.)or more when tested in accordance with the proceduresdescribed in 7.7.1This specification is under the jurisdiction of ASTM Committee E06 onPerformance of Buildings and is the direct responsibility of Subcommittee E06.53on Materials and Processes for Durable Rigidwall Relocatable Structures.Current edition approved Nov.1,2012.Published December 2012.Originallyapproved in 1993.Last previous edition approved in 2008 as E1555 08.DOI:10.1520/E1555-12.2For 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.3Available from Standardization Documents Order Desk,DODSSP,Bldg.4,SectionD,700RobbinsAve.,Philadelphia,PA19111-5098,http:/www.dodssp.daps.mil.Copyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.United States1 5.1.2 Adhesive LifeThe adhesive,when mixed in 1-qt kitquantities in a standard quart paint can,allowed to sit for 30min at 23 6 3C(73.4 6 5.4F),and then used to prepare testspecimens as prescribed in 7.1-7.3,shall still be able to deliverthe lap shear property levels listed in Table 1 for the 23Ctemperature test condition.5.1.3 The adhesive,when mixed in a quart kit and allowedto stand in ambient still air,shall not,as a result of anexothermic reaction,heat itself t