ASTM_C_557_-_03_2017.pdf

Designation:C55703(Reapproved 2017)Standard Specification forAdhesives for Fastening Gypsum Wallboard to WoodFraming1This standard is issued under the fixed designation C557;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 U.S.Department of Defense.1.Scope1.1 This specification includes properties and covers mini-mum performance standards for adhesives intended to bond theback surface paper of gypsum wallboard to wood framingmembers.1.2 This specification also covers test requirements and testmethods for the adhesive used for the application of allthicknesses of gypsum wallboard.1.3 The values stated in inch-pound units are to be regardedas standard.The values given in parentheses are mathematicalconversions to SI units that are provided for information onlyand are not considered standard.1.4 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 limitations prior to use.1.5 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:2C1396/C1396M Specification for Gypsum BoardD905 Test Method for Strength Properties of AdhesiveBonds in Shear by Compression LoadingD907 Terminology of AdhesivesE4 Practices for Force Verification of Testing MachinesE177 Practice for Use of the Terms Precision and Bias inASTM Test Methods3.Terminology3.1 DefinitionsMany terms in this specification are de-fined in Terminology D907.4.Significance and Use4.1 The specification applies to adhesives for bonding theback surface paper of gypsum wallboard of any thickness towood-framing members.4.2 This specification provides a basis for ensuring thequality of the adhesives.4.3 Although the bonds rendered by these adhesives shallhave enough strength by themselves to maintain the bondbetween adherends,they are not intended as a substitute for thecommon practice of using mechanical fasteners to maximizeintegrity of drywall-wood-framing structures.4.4 The tests are suitable for products performance certifi-cation and quality control programs and can be useful to thegeneral public,adhesive manufacturers,distributors,specifiers,architects,contractors,testing laboratories and other businessesand professionals4.5 The results do not include all possible conditions,whichmay occur during final assembly,but indicate a set of perfor-mance characteristics for laboratory controlled bonding vari-ables.5.Adhesive Physical Property Requirements5.1 AdhesivesThe adhesives shall be uniform,homoge-neous mixtures of elastomeric polymers or viscoelastic resins,or both,free of lumps or foreign matter.5.1.1 WorkabilityWhen applied to the framing memberwith a caulking gun or notched trowel,or both,in accordancewith the manufacturers instructions,the adhesive shall exhibita consistency capable of ensuring non-sagging properties.5.1.2 Open TimeThe adhesive shall have an open assem-bly time of between 10 to 20 min to give the user sufficient1This specification is under the jurisdiction of ASTM Committee D14 onAdhesives and is the direct responsibility of Subcommittee D14.70 on ConstructionAdhesives.Current edition approved April 1,2017.Published May 2017.Originallyapproved in 1965.Last previous edition approved in 2009 as C557 03(2009)1.DOI:10.1520/C0557-03R17.2For 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.*A Summary of Changes section appears at the end of this standardCopyright 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 time to apply and,if necessary,reposition the gypsum wall-board at ambient temperatures,ranging from 40 to 100F(4 to38C).5.1.3 Storage LifeThe adhesive shall remain serviceableand meet all the requirements of this specification for not lessthan six months after delivery,when stored in original un-opened containers at