1、Designation:D343400(Reapproved 2013)Standard Test Method forMultiple-Cycle Accelerated Aging Test(Automatic Boil Test)for Exterior Wet Use Wood Adhesives1This standard is issued under the fixed designation D3434;the number immediately following the designation indicates the year oforiginal adoption
2、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 test method covers a procedure for testing thedurability of wood adhesives that
3、 may be suitable for exterior(wet use)exposure conditions.The possible use of adhesivessuitable for evaluation includes,but is not limited to those usedfor laminating large members,manufacturing plywood,orfabricating wood joints such as finger or scarf joints.Thispractice is not suitable for interio
4、r type glues.2,31.2 The test does not evaluate for any biological effects.1.3 The test subjects specimens to a large number ofalternate boil/dry cycles.1.4 The values stated in SI units are to be regarded as thestandard.The inch-pound units in parentheses are provided forinformation only.1.5 This st
5、andard 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.2.Referenced Documents2.1 AST
6、M Standards:4D906 Test Method for Strength Properties of Adhesives inPlywood Type Construction in Shear by Tension LoadingD907 Terminology of AdhesivesD2339 Test Method for Strength Properties of Adhesives inTwo-Ply Wood Construction in Shear by Tension LoadingD4422 Test Method for Ash in Analysis o
7、f Petroleum CokeE122 Practice for Calculating Sample Size to Estimate,WithSpecified Precision,the Average for a Characteristic of aLot or Process3.Terminology3.1 DefinitionsDefinitions of terms in this test methodmay be found in Terminology D907.4.Summary of Test Method4.1 The lumber is selected,adh
8、esive obtained,and testspecimens prepared.4.2 The specimens are subjected to the required number ofboil/dry cycles.4.3 The specimens are withdrawn from the test at therequired periodic intervals.4.4 The designated number of specimens are tested intensile shear at the end of the specified number of b
9、oil/drycycles.4.5 Plot shear strength,kPa(psi),or percent of wood failure,or both,versus the number of boil/dry cycles to which thespecimens have been subjected.4.6 The graph is compared for the test adhesives.Because ofthe variables occurring in wood,a known performance adhe-sive control should be
10、run for each test set being evaluated.5.Significance and Use5.1 This test method is intended to differentiate between theexterior durability of two or more adhesives.At present,this isdone by comparing the adhesives as described in 4.5 and 4.6rather than by assigning absolute numerical values for du
11、ra-bility performance.5.2 The test method as described is for comparing potentiallong-term durability rather than for use as a quality controlprocedure.This makes it suitable for research,adhesiveevaluation,process evaluation,and product design.A modifi-cation could be made,that is,shorten the numbe
12、r of cyclesused so the test method would be suitable for quality control inproduction mills.The results obtained for a particular adhesivecan be used to show how many cycles are required for a millquality control test of that adhesive.1This test method is under the jurisdiction of ASTM Committee D14
13、 onAdhesives and is the direct responsibility of Subcommittee D14.30 on WoodAdhesives.Current edition approved May 1,2013.Published May 2013.Originallyapproved in 1975.Last previous edition approved in 2006 as D3434 00(2006).DOI:10.1520/D3434-00R13.2Walser and Colbeck,“Bond-Degrade Accelerating Mach
14、ine Helps PredictBond Life,”Adhesives Age,Vol 10(11),November 1967,pp.3335.3Kreibich and Freeman,“Development and Design of an Accelerated BoilMachine,”Forest Products Journal,Vol 18,No.12,December 1968.4For referenced ASTM standards,visit the ASTM website,www.astm.org,orcontact ASTM Customer Servic
15、e 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 States1 5.3 The test method assumes that boil/dry cycling is
16、anadequate and useful accelerated aging technique.Evaluation oflong-term durability of adhesives in wood joints under severeservice conditions,including extended exterior exposure,is acomplex field,and no entirely reliable short-term test is knownto ensure that a new type of adhesive system will satisfactorilyresist all of the chemical,moisture,microorganism,and solventeffects that such severe service may involve.Except for effectsof microorganisms and other similar biological influences,thistes
