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
