CEN TS 12037-2003 Wood preservatives C Field test method for determining the relative protective effectiveness of a wood preservative exposed out of ground contact C Horizontal lap.pdf

1、DRAFT FOR DEVELOPMENT DD CEN/TS 12037:2003 Wood preservatives Field test method for determining the relative protective effectiveness of a wood preservative exposed out of ground contact Horizontal lap-joint method ICS 71.100.50 DD CEN/TS 12037:2003 This Draft for Development was published under the

2、 authority of the Standards Policy and Strategy Committee on 17 February 2004 BSI 17 February 2004 ISBN 0 580 43448 6 National foreword This Draft for Development is the official English language version of CEN/TS 12037:2003 and supersedes DD ENV 12037:1996. This publication is not to be regarded as

3、 a British Standard. It is being issued in the Draft for Development series of publications and is of a provisional nature because there is insufficient experience in use of the test method. It should be applied on this provisional basis, so that information and experience of its practical applicati

4、on may be obtained. Comments arising from the use of this Draft for Development are requested so that UK experience can be reported to the European organization responsible for its conversion to a European standard. A review of this publication will be initiated 2 years after its publication by the

5、European organization so that a decision can be taken on its status at the end of its 3-year life. Notification of the start of the review period will be made in an announcement in the appropriate issue of Update Standards. According to the replies received by the end of the review period, the respo

6、nsible BSI Committee will decide whether to support the conversion into a European standard, to extend the life of the Technical Specification or to withdraw it. Comments should be sent in writing to the Secretary of BSI Technical Committee B/515, Wood preservation, at British Standards House, 389 C

7、hiswick High Road, London W4 4AL, giving the document reference and clause number and proposing, where possible, an appropriate revision of the text. A list of organizations represented on this committee can be obtained on request to its secretary. Cross-references The British Standards which implem

8、ent international or European publications referred to in this document may be found in the BSI Catalogue under the section entitled “International Standards Correspondence Index”, or by using the “Search” facility of the BSI Electronic Catalogue or of British Standards Online. Summary of pages This

9、 document comprises a front cover, an inside front cover, the CEN/TS title page, pages 2 to 30, an inside back cover and a back cover. The BSI copyright notice displayed in this document indicates when the document was last issued. Amendments issued since publication Amd. No. Date CommentsTECHNICALS

10、PECIFICATION SPCIFICATIONTECHNIQUE TECHNISCHESPEZIFIKATION CEN/TS12037 December2003 ICS71.100.50 SuperscedesENV12037:1996 Englishversion WoodpreservativesFieldtestmethodfordeterminingthe relativeprotectiveeffectivenessofawoodpreservativeexposed outofgroundcontactHorizontallapjointmethod Produitsdepr

11、servationduboisEssaisdechamppour dterminerlefficacitprotectricedunproduitde prservationduboishorsdecontactaveclesolMthode avecunassemblagejointsuperpos HolzschutzmittelFreilandversuchezurBestimmungder relativenWirksamkeiteinesHolzschutzmittelsohne ErdkontaktVerfahrenmithorizontalerberlappung(Lap joi

12、nt) ThisTechnicalSpecification(CEN/TS)wasapprovedbyCENon8October2003forprovisionalapplication. TheperiodofvalidityofthisCEN/TSislimitedinitiallytothreeyears.AftertwoyearsthemembersofCENwillberequested tosubmittheir comments,particularlyonthequestionwhethertheCEN/TScanbeconvertedintoaEuropeanStandard

13、. CENmembersarerequiredtoannouncetheexistenceofthisCEN/TSinthesamewayasforanENandtomaketheCEN/TSavailable .It ispermissibletokeepconflictingnationalstandardsinforce(inparalleltotheCEN/TS)untilthefinaldecisionaboutthep ossible conversionoftheCEN/TSintoanENisreached. CENmembersarethenationalstandardsb

14、odiesofAustria,Belgium,CzechRepublic,Denmark,Finland,France,Germany,Greece, Hungary,Iceland,Ireland,Italy,Luxembourg,Malta,Netherlands,Norway,Portugal,Slovakia,Spain,Sweden,SwitzerlandandUn ited Kingdom. EUROPEANCOMMITTEEFORSTANDARDIZATION COMITEUROPENDENORMALISATION EUROPISCHESKOMITEEFRNORMUNG Mana

15、gementCentre:ruedeStassart,36B1050Brussels 2003CEN Allrightsofexploitationinanyformandbyanymeansreserved worldwideforCENnationalMembers. Ref.No.CEN/TS12037:2003ECEN/TS12037:2003(E) 2 Contents Page 1 Scope 5 2 Normativereference. .5 3 Definitions,symbolsandabbreviations 5 4 Principle6 5 Materials .7

16、6 Apparatusandequipment . .9 7 Sampleofpreservative .11 8 Testlapjoints . .11 9 Untreatedcontrollapjoints 13 10 Exposuretestsite. .13 11 Inspections.13 12 Assessment13 13 Durationofthetest. .14 14 Validityoftest . .14 15 Testreport 15 AnnexA (informative) Informationonanadditionaltestwithareferencep

17、reservativeand ontreatmentprocesses . .17 AnnexB (informative) Exampleofatestreport.21 AnnexC(informative)Determinationofthepreventiveefficacyofatestpreservativeor componentsofatestpreservativeagainststainingfungiusinghorizontallapjoint method27 AnnexD (informative) Testfieldsite . 29 Bibliography30

18、CEN/TS12037:2003(E) 3 Foreword Thisdocument(CEN/TS12037:2003)hasbeenpreparedbyTechnicalCommitteeCEN/TC 38 “Durabilityofwoodandwoodbasedproducts”,thesecretariatofwhichisheldbyAFNOR. ThisdocumentsupersedesENV 12037:1996. AccordingtotheCEN/CENELECInternalRegulations,thenationalstandardsorganizationsoft

19、he followingcountriesareboundtoannouncethisTechnicalSpecification:Austria,Belgium,Czech Republic,Denmark,Finland,France,Germany,Greece,HungaryIceland,Ireland,Italy,Luxembourg, Malta,Netherlands,Norway,Portugal,Slovakia,Spain,Sweden,SwitzerlandandtheUnitedKingdom.CEN/TS12037:2003(E) 4 Introduction Th

20、emainobjectiveofthemethodistoevaluatetherelativeeffectivenessofthepreservative,applied tojointedspecimensofScotspinesapwoodbyatreatmentmethodrelevanttoitsintendedpractical useandassuchdoesnotnecessarilyacceleratedecaybutreflectsprobableperformanceinservice. Themethodisconcernedwiththeprotectionagain

21、stdecayafterexposuretoawiderangeofmicro organismsoccurringoutofgroundcontactundernaturalconditions.Ittakesintoaccountalsophysico chemicaleffectsofweatheringontheperformanceofthepreservativetreatedwood. Sincethelapjointsareexposedtonaturaloutdoorconditionsduringthetestperiod,variationsintest conditio

22、nsfromoneexposuresitetoanotherhavetobeexpected.Differencesinclimate,especially rainfall,willinevitablyinfluencethegeneralrateofdevelopmentofdecayfungi.However,by comparingtheresultsobtainedforthetestpreservativewiththoseobtainedforuntreatedcontrollap joints,therelativeprotectiveeffectivenessofthepre

23、servativeundertestcanbeevaluated. NOTE TheproceduresdescribedinthisTechnicalSpecificationareintendedtobecarriedoutbysuitably trainedand/orsupervisedspecialists.Appropriatesafetyprecautionsshouldbeobservedthroughouttheuseof theTechnicalSpecification.CEN/TS12037:2003(E) 5 1Scope ThisTechnicalSpecifica

24、tiondescribesamethodoftestforwoodpreservativesthatareintendedfor useinwoodtobeexposedtotheweatheroutofcontactwiththegroundwithouttheadditional protectionofasurfacecoating. Themethodisapplicabletothetestingofcommercialorexperimentalpreservativesappliedby techniquesappropriatetocommercialpractice.Them

25、ethodisapplicabletochemicalproductsused individuallyorincombinationtopreventthedevelopmentofdecayand/oroptionalthe developmentofdisfiguringorganismsinwoodand,wheresuitable,inwoodbasedproducts. NOTE1 Themethodmayalsobeusedtotestothertreatedwoodspeciesandnaturallydurabletimbers.It maybeadaptedfortesti

26、ngthefieldperformanceofotherwoodbasedsystemsandtreatmentsdesignedto enhancedurability,forexampletreatedoruntreatedwoodbasedcomposites,timbertreatedwithnonbiocidal systems,chemicallymodifiedorheattreatedtimber. NOTE2 Althoughthetestisusedtoassessdecay,itispossibletousethemethodtoadditionallyassesssta

27、in oreachseparatelywhenrelevant. 2 Normativereference ThisTechnicalSpecificationincorporatesbydatedorundatedreference,provisionsfromother publications.Thesenormativereferencesarecitedattheappropriateplacesinthetextandthe publicationsarelistedhereafter.Fordatedreferences,subsequentamendmentstoorrevis

28、ionsofany ofthesepublicationsapplytothisTechnicalSpecificationonlywhenincorporatedinitbyamendment orrevision.Forundatedreferencesthelatesteditionofthepublicationreferredtoapplies(including amendments). EN212, WoodpreservativesGuidetosamplingandpreparationforanalysisofwoodpreservatives andtreatedtimb

29、er. 3 Definitions,symbolsandabbreviations 3.1Definitions ForthepurposesofthisTechnicalSpecification,thefollowingdefinitions,symbolsandabbreviations apply: 3.1.1 activeingredient(s) individualchemicalcompoundorcompoundsincludedinthewoodpreservativeproducttogiveit specificactivityagainsttheparticularb

30、iologicalagenciesofdeterioration 3.1.2 additionalprocess anyprocessorapplicationofaproduct,asdefinedbythesupplier,designedtoimprovethe effectivenessofthepreservative 3.1.3 penetratingtreatmentprocess processwhichincludesfeaturesorproceduresintendedtoovercomethenaturalresistanceofwoodto penetrationby

31、awoodpreservativeproductinitsreadyforuseform NOTE Suchprocessesincludeforexamplecurrentlypractisedtechnologiesofdiffusiontreatments,double vacuumandvacuumpressuremethods.CEN/TS12037:2003(E) 6 3.1.4 superficialapplicationprocess processwhichdoesnotincludeparticularfeaturesorproceduresintendedtooverco

32、methenatural resistanceofwoodtopenetrationbyawoodpreservativeproductinitsreadyforuseform NOTE Suchprocessesincludeforexamplebrushandspraytechniquesandshorttermimmersion(dipping) processesinwhichwoodnormallyhasonlyafewminutescontacttimewiththepreservative. 3.1.5 representativesample samplehavingitsph

33、ysicalorchemicalcharacteristicsidenticalwiththevolumetricaverage characteristicsofthetotalvolumebeingsampled(seeEN212) 3.1.6 supplier sponsorofthetest 3.1.7 targetretention retentionrecommendedbythesupplier 3.1.8 applicationrate amountofpreservativeproductpersquaremetretobeappliedinsuperficialproces

34、sesrecommended bythesupplier 3.2 Symbolsandabbreviations 3.2.1 V nUD nominalmedianratingfortheuppersideofthelapjointsforsetsofreplicatesattheassessmentofthe extentofdecay 3.2.2 V nLD nominalmedianratingforthelowersideofthelapjointsforsetsofreplicatesattheassessmentofthe extentofdecay 3.2.3 V nJD nom

35、inalmedianratingforsurfaceswithinthejointareasofthelapjointsforsetsofreplicatesatthe assessmentoftheextentofdecay NOTE ForsymbolsfortheoptionalassessmentofattackbystainingfungiseeAnnexC. 4Principle Jointedspecimens(lapjoints)consistingoftwooverlappingparts(jointmembers)heldtogether mechanicallyarepl

36、acedhorizontally,outofcontactwiththegroundandexposedtotheweather.The lapjointsaredismantledandexaminedatintervals.Theextentofmicrobiologicalattackonthe externalsurfacesandwithinthejointareasisratedaccordingtoaspecifiedratingsystem.Datafor lapjointstreatedwiththetestproductarecomparedwiththosegenerat

37、edfromuntreatedspecimens toassessrelativeeffectiveness.CEN/TS12037:2003(E) 7 5Materials 5.1 Testspecimens 5.1.1Wood species ThereferencespeciesisScotspine( Pinussylvestris Linnaeus) NOTE Additionaltestsmaybecarriedoutusingotherspecies. 5.1.2 Qualityofwood Thewoodshallbefreefromvisiblecracks,stain,de

38、cay,insectdamageandotherdefects.Some knotsarepermitted.Thewoodshallnothavebeenwaterstored,floated,chemicallytreatedor steamed.Thewoodshalloriginatefromtreespreferablyfelledinwinter. NOTE Woodthathasbeenkilndriedattemperaturesbelow60 Cmaybeused . TheScotspineshallbeexclusivelysapwoodcontaininglittler

39、esinandhavingbetween2,5and8 annualringsper10mm.Theproportionoflatewoodintheannualringsshallnotexceed30%ofthe whole.Usewoodwithoutreactionwoodorjuvenilewood. 5.1.3 Provisionoftestspecimens Thelongitudinalfacesshallbeparalleltothedirectionofthegrain.Theannualringsshallhavea contactangleofnotgreatertha

40、n10 tothebroadfacesofthetestspecimens.Maketransversecuts, neatlytogivesharpedgesandafinesawnfinishtotheendgrainsurfaces. Allthewoodusedinthetestshallhavebeenhandledanddriedinthesameway. NOTE1 Ifadditionalwoodspeciesareused,theseshouldbementionedinthetestreporttogetherwiththeir densityandthenumberofa

41、nnualringsper10mmofthetimberusedforthetestspecimens. Woodfromatleastthreetreesshallbeusedandevenlydistributedamongthedifferentgroupsoflap joints. Conditioninaconditioningchamber(see6.2)thetimberstockto(122)%( m/m)moisturecontent. Preparelengthsoftimberwith(381)mm (851)mmcrosssectionbysawing(see6.1)a

42、nd planning(seeFigure1).Fromthelapjointssubsequentlymachinedfromasinglelengthoftimber,not morethanoneshallbeincludedineachsetofreplicates(see5.1.5). NOTE2 Amoisturemeterofthetwoprongedelectricalconductivitytypeissuitableforassessingmoisture content. Eachlapjointshallbepreparedfromasinglepieceofwooda

43、stwomembers(1801)mmlongand separatedbynomorethan100mm,toallowforremovalofknotsandassociatedgrainaberration,to ensureatightfitduringthetest(seeFigure1).Withintheoverlappingpartandtheadjacent50mm thereshallbenoknotsandintherestofeachmembertherearenomorethan3soundknots,the diameterofwhichshallnotexceed

44、10mm. Machinethejointinawaythatafterassemblyofthetwomembersthepithfacesareonthesameside oftheassembledjoint(seeFigure1). Storethejointmembersintheconditioningchamber(6.2)untilrequiredfortreating.CEN/TS12037:2003(E) 8 Dimensionsinmillimetres Key 1 Cablestrap Figure1Lapjoint NOTE Thelapjointmembersareheldtogetherbytwocablestra