1、Designation:D557494(Reapproved 2021)Standard Test Methods forEstablishing Allowable Mechanical Properties of Wood-Bonding Adhesives for Design of Structural Joints1This standard is issued under the fixed designation D5574;the number immediately following the designation indicates the year oforiginal
2、 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 These test methods cover the principles for establishingallowable mechanic
3、al properties for adhesives that can be usedto design adhesive-bonded joints for structural components andassemblies of wood or wood with other materials.These testmethods are modeled after Practice D245.1.2 The properties determined are allowable shear stress,allowable tensile stress,and allowable
4、shear modulus.1.3 In determination of allowable shear-and tensile-stresslevels,these test methods are limited by the horizontal shearand tension perpendicular-to-the-grain capacity of the woodadherends(hard maple,Acer saccharum,Marsh.).The adhe-sives so tested may actually have shear or tensile allo
5、wablestresses exceeding the wood,but the determined allowabledesign stress levels are limited(upper bounded)by the wood inthese test methods.If a wood other than hard maple is used fortesting the adhesive,then the allowable strengths are upperbounded by the properties of that particular wood.1.4 The
6、 strength properties are determined by standardASTM test methods.As a result,only procedural variationsfrom the standards and special directions for applying theresults are given in these test methods.1.5 Time-to-failure data derived from creep-rupture testing(see Test Method D4680)provide a measure
7、 of the ultimatestrength of an adhesive bond as a function of time at variouslevels of temperature and moisture.1.5.1 With proper caution,useful service life at a givenshear stress level may be extrapolated from relatively shortloading periods.1.6 The resistance of the adhesive to permanent loss ofp
8、roperties due to aging(permanence)is assessed by means ofstrength tests after constant elevated-temperature and moistureaging of test specimens.1.6.1 If the subject adhesives will be used to bond wood thathas been treated with a preservative,fire retardant,or any otherchemical to modify its properti
9、es,then the permanence of theadhesive shall be tested using wood adherends treated in thesame manner.1.7 Factors for durability,permanence,and creep derived byshear tests and analysis,are assumed to apply to tension(normal-to-the-bond)strength as well.1.8 Requirements for production,inspection,and c
10、ertifica-tion of adhesives evaluated under these test methods are notincluded.1.9 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.1.10 Thi
11、s 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(T
12、BT)Committee.2.Referenced Documents2.1 ASTM Standards:2D245 Practice for Establishing Structural Grades and Re-lated Allowable Properties for Visually Graded LumberD897 Test Method for Tensile Properties of Adhesive BondsD905 Test Method for Strength Properties of AdhesiveBonds in Shear by Compressi
13、on LoadingD907 Terminology of AdhesivesD1101 Test Methods for Integrity of Adhesive Joints inStructural Laminated Wood Products for Exterior UseD1151 Practice for Effect of Moisture and Temperature onAdhesive BondsD2555 Practice for Establishing Clear Wood Strength ValuesD2559 Specification for Adhe
14、sives for Bonded Structural1These test methods are under the jurisdiction of ASTM Committee D14 onAdhesives and are the direct responsibility of Subcommittee D14.70 on Construc-tion Adhesives.Current edition approved March 1,2021.Published March 2021.Originallyapproved in 1994.Last previous edition
15、approved in 2012 as D5574 94(2012).DOI:10.1520/D5574-94R21.2For 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.Copyrig
16、ht 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.1Wood Products for Use Under Exterior Exposure Condi-tionsD2915 Practice for Sampling