CNS 6717-69(89) 木材防腐劑之性能基準及其試驗法 英文版

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CNS6717,O2027A4(210×297)mm-2-3.QualitativestandardsTestsaccordingtoSect.4shallbeconducted.ThepropertiesofwoodpreservativesateachconcentrationinactualuseshallmeetthequalitativestandardsspecifiedinTable1.3.1Decayresistance:ThedecayresistanceofwoodpreservativesreferstotheaveragemasslossratespecifiedinSect.4.2causedbyeitherLaetiporussulphureusorLenzitesbetulina.3.2Corrosionofiron:ThecorrosionofironofwoodpreservativesreferstothecorrosionratioofironspecifiedinSect.4.3.3.3Hygroscopicity:ThehygroscopicityofwoodpreservativesreferstothehygroscopicratiospecifiedinSect.4.4.3.4Penetration:ThepenetrationofwoodpreservativesreferstotheaverageretentionratiospecifiedinSect.4.5.3.5Emulsifiability:TheemulsifyingstabilityofemulsifiedwoodpreservativesreferstotheseparationrateandresiduerateofactiveingredientsasspecifiedinSect.4.6.Table1.QualitativestandardsofwoodpreservativesPropertyItemQualitativestandardsDecayresistance(1)Averagemasslossratewt%3Corrosionofiron(2)Corrosionratioofiron2.0HygroscopicityHygroscopicratio1.2PenetrationAverageretentionratio0.5InitialstabilitySeparationratevol%1.0Long-termstoragestabilitySeparationratevol%1.0Separationratevol%1.0EmulsifiabilityEmulsifyingstabilityofsolutionforrepeatedusesResiduerateofactiveingredient%100±10Note(1):ThesevaluesshallbetheaveragemasslossrateofcontrolspecimenstestedsimultaneouslywithtreatedspecimensforLaetiporussulphureusexceeding30%andLenzitesbetulinaexceeding15%.Note(2):Thisvaluereferstotheaveragemasslossrateofnailwithavaluebelow2.0forcontrolspecimenstestedsimultaneouslywithtreatedspecimens.CNS6717,O2027A4(210×297)mm-3-4.Methodoftest4.1Generalconsiderations4.1.1Woodspecimen(1)NormalandsoundsapwoodofJapanesecedarandsweetgumshallbeusedaswoodspecimens.Woodspecimensusedinthesametestshallbecutfromthesamepieceofwoodintheair-driedstate.(2)Woodspecimen,withtwoedgegrainsurfaces,shallbesmoothedbysurfacing.AirdriedspecificgravityofJapanesecedar,with3–5ringsper10mm,shallbebetween0.25–0.33,between0.48–0.57forsweetgum,with2–4ringsper10mm.(3)Drywoodspecimensina60±2℃cyclicdesiccatorfor48hr.Placeinaglassdesiccatorforabout30min.Weighthemass(m1)withanaccuracyof0.01g.Storeinanon-hygroscopicdesiccator.4.1.2Sample:Representativewoodpreservativesshallbechosenfromthewoodpreservativestested.Eachofoil-typewoodpreservatives(initsoriginalstate),solventbornewoodpreservatives(useaspecificsolvent),andwaterbornewoodpreservatives(usedeionizedwater)shallbepreparedseparatelytoaliquidstateofspecificconcentration(3).Note(3):Theconcentrationfortestinactualuseshallbedenotedbymasspercent(%).4.1.3Treatedspecimen(1)Putwoodspecimensinabeaker.Putinavacuumglassdesiccatortovacuum.Absorbsampleandreturntonormalpressuresimultaneously.Settleforaperiodoftime.Removewoodspecimensandwipelightly.Weighthemass(m2)withanaccuracyof0.01g.(2)Calculatethesampleretentionofwoodspecimenasfollows.A=100112×−mmminwhich,A:Retention(%);m1:MassobtainedaccordingtoSect.4.1.1(3)(g);m2:MassobtainedaccordingtoSect.4.1.3(1)(g).(3)Treatedspecimensrefertotheselectednumberofwoodspecimens(aftersettlingatroomtemperatureforover20days)withretentionof250±10%forwaterbornewoodpreservativessampleandemulsifyingwoodpreservativessample,andof200±10%forsolventbornewoodpreservativessample.4.2Decayresistance4.2.1Material(1)Testfungi:Twotypesoftestfungiareused.(a)Laetiporussulphureus(B.ex.Fr.)Bond(b)Lenzitesbetulina(2)Culturebottle:Acylindrical,wide-mouthcontainer,withabaseareaof50–100cm2,andatotalcapacityof500–800mL,shallbeusedasculturebottle.(3)Culturemedium:Putabout250gseasand(4)intheculturebottle.Conductsterilizationprocedure(6)afteradding80mLculturesolution(5)withpHadjustedto5.5–6.0.Levelthesurfaceofseasandaftersterilizing.Theliquidsurfaceofculturesolutionshalllevelwiththesurfaceofseasand.Removetheexcessculturesolutionundersterilizedstate.CNS6717,O2027A4(210×297)mm-4-Note(4):SeasandusedshallconformtoNo.1ofthe1stgradespecifiedinCNS1924[Seasand]andshallbedried.Note(5):Thecompositionofculturesolutionincludes4%glucose(conformtoCNS1680[Dextrose,anhydrous(glucose)]),0.3%peptone,1.5%maltextract,anddistilledwater.Mixtheabovethoroughlyanduseasculturesolution.Note(6):Themethodofsterilizationreferstothe120℃treatmentinahumid,hotsterilizerfor30min.(4)Testculture:Add0.3gair-driedwoodpowder(pass0.149mmsieve)ofJapanesecedarandsweetguminthesame,100mLculturesolutionasinSect.4.2.1(3)andsterilize.Inoculatewithfreshtestfungi,pre-incubatedontheslantforlessthan2weeks.Conductvibratingincubationat26±2℃.Disperse3mLgranularfungisolutiononsterilizedculturemediumafterabundanttestfungigrows.Incubateataplacewithatemperatureat26±2℃andrelativehumidityexceeding70%.Aftersufficientgrowthofmyceliaintheculturemediumanduseastestculturetoconducttheincubationtest.4.2.2Specimen:Specimensincludetreatedspecimen,correctionspecimen,andcontrolspecimen.(1)Treatedspecimen:SpecimensshallbeabletoabsorbsampleaccordingtothespecificationsinSect.4.1.3.(2)Correctionspecimen:Correctionspecimenisusedtocorrectthetestresultsforoil-type,andsolventbornesamplethatweretreatedthesamewayasinSect.4.2.2(1).(3)Controlspeci

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