BS DD ENV 12038-2002 Durability of wood and wood-based products - Wood-based panels - Method of test for determining the resistance against wood-destroying basidiomycetes《木和木质产品的耐久.pdf

1、DRAFT FOR DEVELOPMENT DD ENV 12038:2002 Durability of wood and wood-based products Wood-based panels Method of test for determining the resistance against wood-destroying basidiomycetes ICS 79.060.01 NO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAWDD ENV 12038:2002 This Draft f

2、or Development, having been prepared under the direction of the Building and Civil Engineering Sector Policy and Strategy Committee, was published under the authority of the Standards Policy and Strategy Committee on 20 May 2002 BSI 20 May 2002 ISBN 0 580 38330 X National foreword This Draft for Dev

3、elopment is the English language version of ENV 12038:2002. It supersedes DD ENV 12038:1996 which is withdrawn. This publication is not to be regarded as a British Standard. It is being issued in the Draft for Development series of publications and is of a provisional nature because there is at pres

4、ent insufficient experience in the use of this test method. It should be applied on this provisional basis, so that information and experience of its practical application may be obtained. Comments arising from the use of this Draft for Development are requested so that UK experience can be reported

5、 to the European organization responsible for its conversion into a European Standard. A review of this publication will be initiated 2 years after its publication by the European organization so that a decision can be taken on its status at the end of its three-year life. The commencement of the re

6、view period will be notified by an announcement in Update Standards. According to the replies received by the end of the review period, the responsible BSI Committee will decide whether to support the conversion into a European Standard, to extend the life of the prestandard or to withdraw it. Comme

7、nts should be sent in writing to the Secretary of BSI Subcommittee B/515/4, Assessment of preservation efficacy, at 389 Chiswick 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 repre

8、sented on this subcommittee 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 Standards Catalogue under the section entitled “International Standards Correspo

9、ndence Index”, or by using the “Find” facility of the BSI Standards Electronic Catalogue. Summary of pages This document comprises a front cover, an inside front cover, the ENV title page, pages 2 to 25 and a back cover. The BSI copyright date displayed in this document indicates when the document w

10、as last issued. Amendments issued since publication Amd. No. Date CommentsEUROPEANPRESTANDARD PRNORMEEUROPENNE EUROPISCHEVORNORM ENV12038 March2002 ICS79.060.01 SupersedesENV12038:1996 Englishversion DurabilityofwoodandwoodbasedproductsWoodbased panelsMethodoftestfordeterminingtheresistanceagainst w

11、ooddestroyingbasidiomycetes Durabilitduboisetdesmatriauxdrivsdubois PanneauxbasedeboisMthodedessaipour dterminerlarsistanceauxchampignonsbasidiomyctes lignivores DauerhaftigkeitvonHolzundHolzwerkstoffen HolzwerkstoffplattenBestimmungderBestndigkeit gegenholzzerstrendeBasidiomyceten ThisEuropeanPrest

12、andard(ENV)wasapprovedbyCENon23December2001asaprospectivestandardforprovisionalapplication. TheperiodofvalidityofthisENVislimitedinitiallytothreeyears.AftertwoyearsthemembersofCENwillberequestedto submittheir comments,particularlyonthequestionwhethertheENVcanbeconvertedintoaEuropeanStandard. CENmemb

13、ersarerequiredtoannouncetheexistenceofthisENVinthesamewayasforanENandtomaketheENVavailablepromp tly atnationallevelinanappropriateform.Itispermissibletokeepconflictingnationalstandardsinforce(inparalleltothe ENV)untilthefinal decisionaboutthepossibleconversionoftheENVintoanENisreached. CENmembersare

14、thenationalstandardsbodiesofAustria,Belgium,CzechRepublic,Denmark,Finland,France,Germany,Greece, Iceland,Ireland,Italy,Luxembourg,Malta,Netherlands,Norway,Portugal,Spain,Sweden,SwitzerlandandUnitedKingdom. EUROPEANCOMMITTEEFORSTANDARDIZATION COMITEUROPENDENORMALISATION EUROPISCHESKOMITEEFRNORMUNG Ma

15、nagementCentre:ruedeStassart,36B1050Brussels 2002CEN Allrightsofexploitationinanyformandbyanymeansreserved worldwideforCENnationalMembers. Ref.No.ENV12038:2002EENV12038:2002(E) 2 Contents page Foreword4 Introduction .5 1 Scope 6 2 Normativereferences 6 3 Termanddefinition. .6 4 Principle6 5 Testmate

16、rials .7 5.1 Biologicalmaterial . 7 5.2 Othermaterialsandreagents .8 5.3 Apparatus .9 6 Testproduct .9 6.1 General9 6.2 Testspecimenpreparation . 10 7 Numbersoftestspecimens. .10 7.1 Testproductspecimens 10 7.2 Virulencecontrolspecimens. .10 7.3 Sizecontrolspecimens .10 8 Procedure .11 8.1 Precondit

17、ioning .11 8.2 Initialdrymass .11 8.3 Sterilizationoftestspecimens . 12 8.4 Preparationoftheculturevessels .12 8.5 Inoculation12 8.6 Exposureoftestspecimens .12 8.7 Cultureconditionsanddurationofthetest . .13 8.8 Assessmentofthetest 13 9 Validityofthetest 14 10 Assessmentofresults .14 11 Testreport

18、14 AnnexA (informative) Testfungi 16 A.1 Generalinformationonmaintenanceandacquisitionofteststrains16 A.2 Maintenanceandtreatmentoftestfungi. 16 A.3 Informationregardingobligatoryfungi .16 AnnexB (informative) Recommendedbutnoncomprehensivelistofoptionalfungi18 AnnexC (informative) Culturevessels. 1

19、9 AnnexD (normative) Methodsofsterilization .20 D.1 Ionizingradiation .20 D.2 Steam 20 AnnexE (normative) Calculationofthedecaysusceptibilityindex(DSI)21 E.1 Principle21 E.2 Calculation21 AnnexF (informative) Exampleofatestreport.2 2ENV12038:2002(E) 3 Bibliography 25ENV12038:2002(E) 4 Foreword Thisd

20、ocumentENV12038:2002hasbeenpreparedbyCEN /TC 38“Durabilityofwoodandwoodbased products“,thesecretariatofwhichisheldbyAFNOR. ThisdocumentsupersedesENV12038:1996. AnnexesA,B,CandFareinformative. AnnexesDandEarenormative. AccordingtotheCEN/CENELECInternalRegulations,thenationalstandardsorganizationsofth

21、efollowing countriesareboundtoannouncethisEuropeanPrestandard:Austria,Belgium,CzechRepublic,Denmark,Finland, France,Germany,Greece,Iceland,Ireland,Italy,Luxembourg,Malta,Netherlands,Norway,Portugal,Spain, Sweden,SwitzerlandandtheUnitedKingdom.ENV12038:2002(E) 5 Introduction ThisEuropeanPrestandardde

22、scribesalaboratorytestmethodinwhichsmallsamplesofthewoodbasedpanel productundertestareexposedtoattackbyarangeofwooddestroyingbasidiomycetefungiinpureculture.The thicknessofthetestspecimensvaries,sinceitisdictatedbythethicknessofthewoodbasedpanelproductunder test.Inordertomakecomparisonsofthedecayres

23、istanceofwoodbasedpanelproductsofdifferentthicknesses, solidwoodspecimensofthesamedimensionsasthewoodbasedpanelproducttestspecimensareincluded.The effectofconstituentsgivingtemporaryprotectionisavoidedbytestingafterpreconditioningofthecutspecimensin afreelyventilatedenvironment.Thetestmethodalsoincl

24、udesaminimummoistureuptakerequirement. Theproceduresdescribedinthisprestandardmethodareintendedtobecarriedoutbysuitablytrainedand/or supervisedspecialists.Appropriatesafetyprecautionsshouldbeobservedthroughouttheuseofthisprestandard.ENV12038:2002(E) 6 1Scope ThisEuropeanPrestandardspecifiesamethodfo

25、rassessingtheresistanceofwoodbasedpanelproductsto attackbywooddestroyingbasidiomycetefungigrowinginpureculture. Themethodisapplicabletouncoated,rigidwoodbasedpanelproducts.Itisapplicabletothedeterminationofthe decayresistanceofwoodbasedpanelproducts: madefromnaturallydurablematerials; madefrommateri

26、alstreatedwithpreservativespriortomanufacture; treatedwithapreservativewhichisintroducedduringmanufacture,forexampleasanadditivetotheadhesive; treatedwithpreservativeaftermanufacture. NOTE1 Thismethodcanbeusedinconjunctionwithanappropriateageingprocedure,forexampleEN73orEN84. NOTE2 Woodbasedpanelpro

27、ductsthathavereceivedapreservativetreatmentaftermanufacturecanbesusceptibleto attackthroughthecutedgesofthetestspecimensandthedecayresistanceindicatedcanbelessthanthatofcompletepanels usedinservice. 2 Normativereferences ThisEuropeanPrestandardincorporatesbydatedorundatedreference,provisionsfromothe

28、rpublications.These normativereferencesarecitedattheappropriateplacesinthetext,andthepublicationsarelistedhereafter.For datedreferences,subsequentamendmentstoorrevisionsofanyofthesepublicationsapplytothisEuropean Prestandardonlywhenincorporatedinitbyamendmentorrevision.Forundatedreferencesthelateste

29、ditionofthe publicationreferredtoapplies(includingamendments). EN73,WoodpreservativesAcceleratedageingtestsoftreatedwoodpriortobiologicaltestingEvaporative ageingprocedure. EN84,WoodpreservativesAcceleratedageingtestsoftreatedwoodpriortobiologicaltestingLeaching procedure. ENISO3696, Waterforanalyti

30、callaboratoryuseSpecificationandtestmethods (ISO3696:1987) . 3 Termanddefinition ForthepurposesofthisEuropeanPrestandard,thefollowingtermanddefinitionapply. 3.1 supplier thesponsorofthetest 4Principle Specimenspreparedfromthewoodbasedpanelproduct(s)undertest,afterpreconditioning,andcontrol specimens

31、ofdefinedfunctionareexposedtoattackbypureculturesofwooddestroyingbasidiomycetefungi. Afteraprescribedperiodofincubationunderdefinedconditions,thelossindrymassofthespecimensisusedas thecriterionfordeterminingtheextentofattack.This,incomparisonwiththelossinmassofthesizecontrol specimens,isusedtoestima

32、tetheresistanceofthewoodbasedpanelproduct(s)toattackbythetestfungi.ENV12038:2002(E) 7 5 Testmaterials 5.1Biological material 5.1.1 Testfungi 5.1.1.1 Obligatorytestfungiforalltypesofpanelproducts(seealsoannexA): Coniophoraputeana (SchumacherexFries)Karsten(BAMEbw.15) LossinmassofScotspinesapwoodvirul

33、encecontrolspecimensin16weeks:amassfractionofminimum20% Pleurotusostreatus (JacquinexFries)Qulet(FPRL40C) Lossinmassofbeechvirulencecontrolspecimensin16weeks:amassfractionofminimum20% 5.1.1.2 Speciestobeusedcompulsorilyonthenatureofthetestproduct(seealsoannexA): Fortestproductsmadeonlyfromsoftwood:

34、Gloeophyllumtrabeum (PersoonexFries)Murrill(BAMEbw.109) LossinmassofScotspinesapwoodvirulencecontrolspecimensin16weeks:amassfractionofminimum20% Fortestproductsmadeonlyfromhardwood: Coriolusversicolor (Linnaeus)Qulet(CTB863A) Lossinmassofbeechvirulencecontrolspecimensin16weeks:amassfractionofminimum

35、20% Fortestproductsmadefromamixtureofsoftwoodandhardwood,bothGloeophyllumtrabeumandCoriolus versicolorshallbeused. 5.1.1.3 Optionaltestfungi Forspecificregionalusesorconditions,itisalsopossibletochooseotherfungionanoptionalbasis 1) . 5.1.1.4 Maintenanceofstrains Thestrainsshallbemaintainedandtreated

36、(frequencyofsubculturing,alternationofculturemediaetc.)in accordancewiththeinstructionsfromtheirlaboratoryoforigin(seeannexA).Theparentstrainshallbemaintained inthelaboratoryofitsorigin,soastoconserveandassureitsvigour. Iftestsarenotundertakenregularly,orifastrainshowssignsofdegeneration,anewstandar

37、dcultureofthestrain shallbeobtainedfromthelaboratoryoforiginforeachtest.Whennewstrainsarereceived,thevirulenceshallbe testedtoensurethatthemasslossachievedisabovetheminimumvaluegiveninannexAorannexB. 5.1.2 Solidwoodstock 5.1.2.1Wood species Thefollowingspeciesshallbeusedforthetest: Scotspinesapwood(

38、 Pinussylvestris Linnaeus) Beech ( Fagussylvatica Linnaeus) 1) SeeannexBforanoncomprehensivelistofrecommendedoptionalfungi.ENV12038:2002(E) 8 5.1.2.2 Qualityofthewood Thewoodshallbefreefromvisiblecracks,stain,decay,insectdamageorotherdefects.Thewoodshallnothave beenwaterstored,floated,chemicallytrea

39、tedorsteamed. NOTE Woodthathasbeenkilndriedattemperaturesbelow60Cmaybeused. TheScotspineshallbeexclusivelysapwoodcontaininglittleresinandhavingbetween2,5and8annualgrowth ringsper10mm.Theproportionoflatewoodintheannualringsshallnotexceed30%ofthewhole. Thebeechshallbeevengrained,freefromtylosesanddisc

40、oloration.Itshallhavebetween2and6annualgrowth ringsper10mm. 5.1.2.3 Virulencecontrolspecimens Prepareplanedstripsfromthesolidwoodstockhavingacrosssection(250,5)mmx(150,5)mm.The longitudinalfacesshallbeparalleltothedirectionofthegrain.Theannualringsshallnotbeparalleltothefaces (contactanglegreatertha

41、n10)butotherwisecanruninanydirection.Maketransversecuts,neatlytogivesharp edgesandafinesawnfinishtotheendgrainsurfaces,togivevirulencecontrolspecimens(500,5)mmlong. Thedimensionsofeachvirulencecontrolspecimenatamassfractionof(122)%moisturecontent 2) shallbe (500,5)mm (250,5)mm (150,5)mm. Thespecimen

42、sshalloriginatefromaminimumofthreetreesorshallbetakenfromastockoriginallyofmorethan 500specimens. 5.1.2.4 Sizecontrolspecimens Prepareplanedstripsfromthesolidwoodstockhavingacrosssection(500,5)mmxthickness 3) ofthewood basedpanelproductundertest.Maketransversecuts,neatlytogivesharpedgesandafinesawnf

43、inishtothe endgrainsurfaces,togivesizecontrolspecimens(500,5)mmlong.Theannualringsofthespecimensshallbe orientatedasforthevirulencecontrolspecimens(5.1.2.3). Thedimensionsofeachsizecontrolspecimenatamassfractionof(122)%moisturecontent 2) shallbe (500,5)mmx(500,5)mmxthicknessofthewoodbasedpanelproduct. Theovendrydensityshallbe(0,48 0,05)g/cm 3 fortheScotspinespecimensand(0,67 0,05)g/cm 3 forthe beechspecimens. 5.2 Othermaterialsandreagents 5.2.1 Water Waterconformingtograde3ofENISO3696shallbeusedthroughout. 5.2.2 Culturemedium Theculturemediumisamaltagarmediumw