CEN TR 14723-2003 Durability of wood and wood-based products Field and accelerated conditioning tests (FACT) for wood preservative out of ground contact《木材和木制品的耐用性不与地面接触的木材防腐剂的现场和加.pdf

1、PUBLISHED DOCUMENT PD CEN/TR 14723:2003 Durability of wood and wood-based products Field and accelerated conditioning tests (FACT) for wood preservative out of ground contact ICS 71.100.50 PD CEN/TR 14723:2003 This Published Document was published under the authority of the Standards Policy and Stra

2、tegy Committee on 22 January 2004 BSI 22 January 2004 ISBN 0 580 43309 9 National foreword This Published Document is the official English language version of CEN/TR 14723:2003. The UK participation in its preparation was entrusted to Technical Committee B/515, Wood preservation, which has the respo

3、nsibility to: A list of organizations represented on this committee can be obtained on request to its secretary. Cross-references The British Standards which implement international or European publications referred to in this document may be found in the BSI Catalogue under the section entitled “In

4、ternational Standards Correspondence Index”, or by using the “Search” facility of the BSI Electronic Catalogue or of British Standards Online. This publication does not purport to include all the necessary provisions of a contract. Users are responsible for its correct application. Compliance with a

5、 British Standard does not of itself confer immunity from legal obligations. aid enquirers to understand the text; present to the responsible European committee any enquiries on the interpretation, or proposals for change, and keep the UK interests informed; monitor related international and Europea

6、n developments and promulgate them in the UK. Summary of pages This document comprises a front cover, an inside front cover, the CEN/TR title page, pages 2 to 74, an inside back cover and a back cover. The BSI copyright notice displayed in this document indicates when the document was last issued. A

7、mendments issued since publication Amd. No. Date CommentsTECHNICALREPORT RAPPORTTECHNIQUE TECHNISCHERBERICHT CEN/TR14723 December2003 ICS71.100.50 Englishversion DurabilityofwoodandwoodbasedproductsFieldand acceleratedconditioningtests(FACT)forwoodpreservativeout ofgroundcontact Durabilitduboisetdes

8、matriauxdrivsdubois Essaisdechampetdeconditionnementacclr(FACT) pourlesproduitsdeprservationduboishorscontactdu sol DauerhauftigkeitvonHolzundHolzwerkstoffenFreiland undbeschleunigteAlterungsprfverfahren(FACT) ThisTechnicalReportwasapprovedbyCENon26November2003.IthasbeendrawnupbytheTechnicalCommitte

9、eCEN/TC38. CENmembersarethenationalstandardsbodiesofAustria,Belgium,CzechRepublic,Denmark,Finland,France,Germany,Greece, Hungary,Iceland,Ireland,Italy,Luxembourg,Malta,Netherlands,Norway,Portugal,Slovakia,Spain,Sweden,SwitzerlandandUn ited Kingdom. EUROPEANCOMMITTEEFORSTANDARDIZATION COMITEUROPENDEN

10、ORMALISATION EUROPISCHESKOMITEEFRNORMUNG ManagementCentre:ruedeStassart,36B1050Brussels 2003CEN Allrightsofexploitationinanyformandbyanymeansreserved worldwideforCENnationalMembers. Ref.No.CEN/TR14723:2003ECEN/TR14723:2003(E) 2 Contents 1 Scope . 4 2A c r o n y m s . 5 3 Descriptionoftheproject,back

11、groundandobjectives . 5 4 Projectcontributorsandroles . 6 5 Coretask1partA:weatheringcycles(EUC1,2and3),superficialtreatments 7 5.1 Introduction . 7 5.2 Aimsandobjectives . 8 5.3 Deliverables. 9 5.4 Materialandmethods . 9 5.5 Resultsanddiscussion 10 5.6 Conclusions. 14 6 Coretask1PartB:Weatheringcyc

12、les(EUC3),impregnationtreatments 14 7 Coretask2:afieldstudyofpreservativetreatedwoodinEUC3(lapjointtest) 17 7.1 Introduction . 17 7.2 Aimsandobjectives . 18 7.3 Deliverables. 18 7.4 Materialsandmethods . 18 7.5 Resultsanddiscussion 20 7.6 Conclusions. 25 7.7 Subtask2.1:Chemicalanalysisoflapjoints 26

13、 7.8 Subtask2.2:Microbialecology 35 7.9 Subtask2.3:Suitabilityoflapjointsforcomposites . 36 7.10 Subtask2.4:Naturaldurability . 49 7.11 Subtask2.5:COSTclimateindex:effectoflocalclimateondecay(P2) . 50 7.12 Subtask2.6:Moisturemeasurementsinlapjoints(partner15) 51 7.13 Subtask2.7:LeachingofsolublesinE

14、UC2temporarilyexposedtoEUC3 53 8 Coretask3:microbiologicalpreconditioningforEUC3 54 8.1 Objectives 54 8.2 Descriptionoftask 54 8.3 Outputs 55 8.4 Introduction . 55 8.5 Subtask3.1:Superficiallytreatedspecimens 55 8.6 Subtask3.2:Impregnatedtestblocks . 61 9 Coretask4:preconditioninginrelationtoEUC4and

15、relatedfieldecologystudies(combined reportofsubtasks4.1and4.2). 67 9.1 Objectives 67 9.2 Descriptionofthetask . 67 9.3 Outputs 67 9.4 Subtasks4.1and4.2 . 67 Bibliography 72 pageCEN/TR14723:2003(E) 3 Foreword Thisdocument(CEN/TR14723:2003)hasbeenpreparedbyTechnicalCommitteeCEN/TC38“Durabilityofwood a

16、ndwoodbasedproducts”,thesecretariatofwhichisheldbyAFNOR. ThisstatusofthisdocumentasTechnicalReporthasbeenchosenbecauseitscontentistheresultofthe conormativeresearchasfieldtestsforwoodpreservativesoutofgroundcontactinconjunctionwithmethodsfor preconditioningtestspecimenspriortotest. Thisconormativere

17、searchhasbeenundertakenintheframeworkoftheSMTProject:F.A.C.TSMT4CT962135. (Coordinators:DrD.J.DICKINSONandDrS.MOLNARfromImperialCollegeofScience,Technologyand Medicine(London). AccordingtotheCEN/CENELECInternalRegulations,thenationalstandardsorganizationsofthefollowing countriesareboundtoannouncethi

18、sTechnicalReport:Austria,Belgium,CzechRepublic,Denmark,Finland, France,Germany,Greece,Hungary,Iceland,Ireland,Italy,Luxembourg,Malta,Netherlands,Norway,Portugal, Slovakia,Spain,Sweden,SwitzerlandandtheUnitedKingdom.CEN/TR14723:2003(E) 4 1Scope ThisTechnicalReportpresentsasummaryoftheresearchoftheS.M

19、.T.Project:F.A.C.T,SMT4CT962135.As suchitdetailsthesupportinginformationfortheproposalsforanewconditioningstandardtoreplaceEN73and EN84andformodificationandvalidationofENV12037.ThefullreportispresentedandreferencedtoTechnical annexes,whichareavailableonrequest. TheFACTprojectinvolvedthestudyofthefat

20、eofchosenwoodpreservativesinfieldandlaboratorytestsandthe affectonbiologicalperformance.Theworkconsistedoffourcoretasksandassociatedsubtasksdesignedto providethescientificbackgroundtotheproposalsmade. Task1 Thisconsistedofastudyofartificialweatheringtechniquesfortheconditioningoftreatedtestblockspri

21、orto biologicaltest.Itwasoriginallyhopedthatitmightbepossibletorelatedifferentweatheringcyclestothedifferent climaticconditionsfoundwithinEurope.Howeverthisdidnotprovepossiblebutitispossibletorecommenda singleweatheringcycletoreplacetheuseofEN73andEN84.Adraftexperimentalstandardhasbeenprepared based

22、onthefindingsofthiswork. AllthesupportingdataandassociatedstudiesaresummarisedinthisTechnicalreportinclauses5and6. Task2 ThistaskconsistedofanextensivefieldtestbasedonENV12037andassociatedsubtasks.Themethodproved veryrobustbutsignificantmodificationsarerecommendedandtheENVistoberedraftedinthelightof

23、results containedinthisreport.Thisfieldtestshouldbeconsideredassimulatedservicetrialratherthananaccelerated fieldtest;aconceptthatneedscarefulconsiderationwithintheEN599framework. Subtasks2.3and2.4examinedthesuitabilityofthemethodforcompositesandthetestingofnaturallydurable timbers.Atthisstageitisto

24、oearlytomakerecommendationfortheirinclusioninthestandardbuttheresultslook promisingandthemethodwillprobablybemodifiedatalaterrevision. Tasks3and4 Thesetasksexaminedtheroleofbioconditioningoftestsamplesinuseclass3and4.Theresultsarepresented inclauses8and9andclearlyindicatetheimportanceofthissubject.I

25、tisrecommendedthaturgentattentionis giventotakingthisworkfurtherparticularlyforthetestingoforganicbasedpreservatives.Althoughnotyetready forstandardisation,theresultspresentedherewillproveinvaluabletoindustryindesigningdevelopment programmesforthenewgenerationoforganicbasedpreservatives. Insummary:

26、anewexperimentalstandardwillbeproducedtoreplaceEN73andEN84forthephysicalconditioningoftest blocks; ENV12037willbemodifiedtotakeintoaccounttheextensivefindingsoftheproject; theuseofENV12037fornaturaldurabilityandcompositetestingwillbeconsideredwhenmoreresultsare available; furtherworkonbiologicalcond

27、itionsisurgentlyrecommended.CEN/TR14723:2003(E) 5 2Acronyms a.i Activeingredient(biocide) EUC EuropeanUseClass HDO NCyclohexyldiazeniumdioxid UC useclass ICP inductioncoupledplasmaatomicemissionspectroscopy m.corMC moisturecontent m/m mass/mass nrofreps numberofreplicates OSB orientedstrandboard QUV

28、 UVartificialweatheringmachinemanufacturedbyQpanelCo.Cleveland,Ohio,USA r.h relativehumidity SD standarddeviation TM trademark TBTO/TnBTO trinbutyltinoxide UVSCabinet cabinetwithUVlightandsprayoptionforartificialweatheringoftreatedwood WHC waterholdingcapacity WMC woodmoisturecontentin% 3 Descriptio

29、noftheproject,backgroundandobjectives CENTC38WG25(exWG5)hasclearlyidentifiedimportantgapsinthetestmethodsnecessaryfortestingwood preservatives.Thereisanurgentneedfornewwoodpreservatives,particularlyintheaboveground,exposed situation,(UseClass3).Nosuitablefieldtestexistsforthisuseclassforunpaintedtim

30、ber.Alsocurrent preconditioningsystemsareinadequateandinsomecasesarenotrelevanttocertainuseclassesorindustrys needs.Thereexiststherefore,aneedtoestablishasuitablefieldtestandasingleprogressive,preconditioning systemsuitableforeachoftheuseclassesinwhichconstructiontimbersareexposed.Thedevelopmentofne

31、w, environmentallysafewoodpreservativesisurgentlyneededasthepressureontheoldersystemsincreasesandthe useofdurable,tropicaltimbersbecomelessacceptable. Insummarytheobjectivesconsistof: a) toidentifyandquantifytheroleofleaching,light,hydrolysisandnondecay,biologicalfactorsinthelongterm performanceofwo

32、odpreservatives.ThesefactorsaretoberelateddirectlytothespecificEuropeanUse Classesi.e.: EUC1(Drytimberinbuilding,subjectedtoinsectattack); EUC2(Timberinbuildingsubjectedtooccasionalwettingandatriskfrominsectsandbrownrotfungi);CEN/TR14723:2003(E) 6 EUC3(Timberexposedtotheweatherbutoutofgroundcontacta

33、ndsubjecttoinsectandfungaldecay frombothwhiteandbrownrotfungi); EUC4(Timberingroundcontactorfreshwaterandsubjecttoallbiologicalagenciesofattackincluding softrotfungi); Theimportantfactorstudiedwillberelateddirectlytothefateofthepreservativeinthefieldandtotheexisting biologicaltestrelevanttoeachusecl

34、ass. b) tostudyacceleratedageingproceduresandbiologicalpreconditioningprocedurescapableofreproducingthe ageingeffectsoccurringinpractice.Thiswillbedonebystudyingthelossesandchangesofchosen preservativesincomparisontofielddata.Thiswillthenenableschedulesandprocedurestobedefinedin ordertosimulatenatur

35、allongtermexposureofpreservativetreatedwood; c) toprepareatechnicalcasetorecommendspecificageingandpreconditioningcyclessuitabletobeusedas standardlaboratoryproceduresforacceleratedageingoftreatedwoodsamples,priortobiologicaltest. 4 Projectcontributorsandroles P1.ImperialCollegeofScience,Technologya

36、ndMedicine(IMPCOL)UK Partner1(IMPCOL)wasresponsibleforcoordinatingtheproject.Theyactedasasiteforthefieldtestinorderto provideidenticalconditionsfortheirworkinTask3concernedwithbiopreconditioning.Theywerealsoresponsible forstudyingbioconditioninginEUC4.Boththesetaskswerelongtermandfeddirectlyfromthew

37、orkoftheother participants.(Coretasks2,3and4;Subtask2.5). P2.BuildingResearchEstablishment(BRE)UK Partner2(BRE)wasresponsibleforcarryingoutthefundamentallaboratoryworkonthestabilityofinsecticidesin EUC1and2.Thisworkhelpedidentifythetrueroleofassociatedfactorsinthelossofefficacyandunderpinthe laborat

38、oryweatheringtrials.(Subtasks1.1and2.5). P3.TNO.BuildingConstructionResearch(T.N.O)Netherlands Partner3(TNO)tookresponsibilityforthelaboratoryweatheringtrialswithTnBTOandalsoforthechemical analysisofthispreservativeinthefieldtrials.Theyexposedsuperficiallytreatedsamplesinthelapjointtrialand alsostud

39、iednaturaldurabilityofimportedtimbersinthelapjointtrial.TheyalsocooperatedwithP15onM/C studies.(Coretasks1(b)and2;Subtasks2.1,2.4and2.6). P4.BundesanstaltfrMaterialforschungundprfung(BAM)Germany Partner4(BAM)wasakeypartnerinlaboratoryweatheringtrials.Theyassumedresponsibilityforthe organometallicpre

40、servativeinboththelaboratoryandfieldtrialsincooperationwiththeirindustrialpartner (Wolman).Theyalsoexposedsuperficiallytreatedlapjointsandconductedecologicalstudiesonthesejoints.They alsocomparedthelaboratoryageingprocedurestotheGermanRALtestsinanassociatedtrialfundednationally. Theyalsocarriedoutbi

41、opreconditioningtrialswithsuperficiallytreatedtimber.Partner4coordinatedthefield trials.(Coretasks1(b),1.2and2;Subtasks2.1,2.2and3.1). P5.UniversiteitGhent(RUG)Belgium Partner5(RUG)wasresponsibleforthelaboratorytrialsandfieldtrialswithregardtothetriazolepreservative. Thiswasincooperationwiththeirind

42、ustrialpartner,Janssen.(Coretasks1(b)and2;Subtask2.1). P6.CentreTechniqueduBoisetdelAmeublement(CTBA)France Partner6(CTBA)exposedfieldtrialsintwositeswithimpregnatedjoints.Theywillalsocarriedoutmildleaching proceduresforEUC2.(Coretask2;Subtask2.7).CEN/TR14723:2003(E) 7 P7.SwedishUniversityofAgricult

43、uralSciences.DepartmentofWoodScience(Formerly:Departmentof ForestProducts).(SLU)Sweden Partner7(SLU)exposedimpregnatedlapjointsandcarriedoutecologicalstudiesofthejoints.Theyalsoexposed naturaldurabilitytrialsinparallel.SLUalsocooperatedwithP1inthebiopreconditioningworkinEUC4,where theyprovidedtheessentialfielddatafromtheirfieldsites.(Coretasks2and4;Subtasks2.2and2.4). P8.JanssenPharmaceutica(Janssen)Belgium Partner8(Janssen)providedthetechnicalknowledgeonthetriaz