GB 7866-1987 森林土壤交换性钾和钠的测定
作者:标准资料网 时间:2024-05-16 17:39:56 浏览:8954
来源:标准资料网
下载地址: 点击此处下载
基本信息
| 标准名称： | 森林土壤交换性钾和钠的测定 |
| 中标分类： | 农业、林业 >> 土壤与肥料 >> 土壤、肥料综合 |
| 替代情况： | 调整为LY/T 1246-1999 |
| 发布日期： | 1900-01-01 |
| 实施日期： | 1988-01-01 |
| 首发日期： | 1900-01-01 |
| 作废日期： | 1900-01-01 |
| 出版日期： | 1900-01-01 |
| 页数： | 2页 |
适用范围
没有内容
前言
没有内容
目录
没有内容
引用标准
没有内容
所属分类： 农业 林业 土壤与肥料 土壤 肥料综合
下载地址: 点击此处下载
【英文标准名称】:StandardPracticeforRapidDryingofCompactedAsphaltSpecimensUsingVacuumDryingApparatus
【原文标准名称】:用真空干燥器对紧凑型沥青样本快速干燥的标准实施规程
【标准号】:ASTMD7227-2006
【标准状态】:现行
【国别】:
【发布日期】:2006
【实施或试行日期】:
【发布单位】:美国材料与试验协会(US-ASTM)
【起草单位】:D04.21
【标准类型】:(Practice)
【标准水平】:()
【中文主题词】:器具;地沥青;紧凑型;干燥;样品;真空干燥
【英文主题词】:
【摘要】:Specimendryweightisacriticalmeasureindeterminationofaccuratedensityandmanyothertestsintheconstructionandrawmaterialsindustries.Dryingspecimensatroomtemperatureisrequiredforsometestsandprovidesanadvantageforotherteststoensuretheintegrityandtopreservethecharacteristicsofspecimens.Thispracticecoversdryingcompactedasphaltspecimensinavacuumchamberthatiscapableofkeepingthespecimenatclosetoroomtemperature.Avacuumpumpreducesthepressureinsidethechamber,thusallowingwatertoevaporateatlowtemperature.Sincethespecimennaturallycoolsduringtheevaporationprocess,makingwaterhardertoevaporate,itisimportanttohavepropertemperaturecontrolsinthechambertoensurespecimenremainsatclosetoroomtemperature.Automaticcontrolswithintheunitallowthespecimentoremainatclosetoroomtemperaturebyperiodicallyallowingaflowofwarmairtoenterthevacuumchamber.Cyclingbetweenvacuumandairflowconditionsallowsthespecimentodryinashortperiodoftime.Completelysaturatedspecimenswithover30gofretainedwatercanbedriedinabout30minutes.Formostfieldcoresthatarenotcompletelysaturatedthedryingtimeisgenerallylessthan15minutes.Note18212;Cycletime(period)candependonthematerialcomposition.Eachcycleinvolvesanalternatingperiodof30to180secondsofvacuumoperationand30to120secondsofairflow.Thismethodcanbeusedfor100mmdiameter,150mmdiametercylindrical,andcubicalcompactedbituminousspecimens.Thismethodcanalsobeusedfordryinglooseasphaltmixtures,aggregatesamplesandothersolidspecimens.Followmanufacturersrecommendedproceduresfordryingspecimensotherthancompactedbituminousspecimens.Thismethodcanbeusedtodeterminemoisturecontentandamountofwaterlossduringdryingbyweighingthesamplebeforeandafterthedryingoperations.1.1Thispracticecoverstheprocessofdryingcompactedasphaltspecimensusingvacuumdryingapparatus.1.2Thespecimensdriedbythispracticeremainatroomtemperature,whichhelpsinmaintainingspecimenintegrityduringthedryingprocess.1.3Thispracticecanbeusedforcompactedcylindricalandcubicalbituminouslaboratoryandfieldspecimens1.4Thispracticecanalsobeusedfordryingotherconstructionmaterialssuchasconcrete,soils,aggregatesandlooseasphaltmixtures.Usemanufacturersrecommendationsfordryingotherconstructionmaterials.1.5ThevaluesstatedinSIunitsaretoberegardedasthestandard.Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappropriatesafetyandhealthpracticesanddeterminetheapplicabilityofregulatoryrequirementspriortouse.
【中国标准分类号】:E43
【国际标准分类号】:91_100_50
【页数】:3P.;A4
【正文语种】:
【英文标准名称】:StandardTestMethodforDeterminationofAbrasionandSmudgeResistanceofImagesProducedfromBusinessCopyProducts(SutherlandMethod)
【原文标准名称】:由办公复制品产生的图象抗磨抗污性能测定的标准试验方法(萨瑟兰法)
【标准号】:ASTMF1571-1995(2008)
【标准状态】:现行
【国别】:美国
【发布日期】:1995
【实施或试行日期】:
【发布单位】:美国材料与试验协会(US-ASTM)
【起草单位】:F05.02
【标准类型】:(TestMethod)
【标准水平】:()
【中文主题词】:
【英文主题词】:abrasion;abrasionresistance;densitometer;imagepermanence;impactprinter;printedmatter;reflectometer;smudge;Sutherland;typewriterribbon;Impactprinters;Printedmatter;Reflectometer/reflectrometry;Smudge;Sutherlandinkrubtester;Typewrit
【摘要】:Thistestmethodisdesignedtosimulatethetypeofdamageresultingfrompaperrubbingagainstaprintedimage.Theprimarymethodofevaluationiseitherreflectanceoropticaldensityreadings.Dependingupontheobjectiveofthetest,comparisonofeithertheimageortheareaadjacenttotheimageisevaluatedbeforeandafterrubbing.Thistestmethodcanbeusedforcontrolofproductqualityaswellasaresearchanddevelopmenttool.Aswrittenthistestmethodisintendedforuseonlywithimpactprintedimagesinvolvingribbons.However,itcanbemodifiedtoevaluateothertypesofbusinessimagessuchasthoseproducedbynon-impactprintersandcopiers,inkjetprinters,andthermaltransferprinters.Thedegreeofimagetransferredbyrubbingfromaprintedimagecanbeaffectedbyvariousfactorsincludingthetypeofprinter,theconditionoftheunit,suppliesemployed,timesinceimaging,andenvironmentalconditions.Asmanyaspossibleofthesevariablesshouldbecontrolledduringthetest.Acontrolsamplewithknowncharacteristics,ifavailable,shouldberunalongwiththetestsamples.1.1Thistestmethodcoversaprocedurefordeterminingtheamountofimagetransferredfromonesiteandredepositedatanothersite(smudge)onadocument.TheSutherlandInkRubTesterwith4-lb(1.82-kg)testblockisthetestinstrumentforproducingthetransferandeitherareflectometerordensitometerisemployedformeasuringthechangeinimages.Alternatively,avisualratingordercanbeemployedtoestablisharankingorder.Thedegreetowhichtheoriginalimageisunaltereduponrubbingisconsideredtobetheabrasionresistance.1.2Thistestmethodcanbeemployedtoevaluatethesmudgeresistanceofbusinessimagingproductsproducedbytypewriters,andimpactprinters.1.3Thistestmethodcanalsobeemployedtomeasureperformancecharacteristicsforaproduct.Theusershouldselecttestequipmentthatisappropriateformeasuringthedegreeofabrasiontothesamples.Samplesaretestedbeforeandafterrubbingandcomparisonsofresultsmade.Inthistestmethodproductperformanceevaluationsareoptional.1.4OthertestmethodsemployingtheCrockmeter,TaberAbrader,andGavartiGA-C.A.T.canbeemployedtoevaluatethesmudgeandabrasioncharacteristics.ResultsbytheseunitsarenotnecessarilyequivalenttothoseobtainedwiththeSutherland.1.5Thevaluesstatedininch-poundunitsaretoberegardedasthestandard.TheSIunitsgiveninparenthesesareforinformationonly.1.6Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappropriatesafetyandhealthpracticesanddeterminetheapplicabilityofregulatorylimitationspriortouse.
【中国标准分类号】:Y54
【国际标准分类号】:37_100_10
【页数】:5P.;A4
【正文语种】:英语
【原文标准名称】:用真空干燥器对紧凑型沥青样本快速干燥的标准实施规程
【标准号】:ASTMD7227-2006
【标准状态】:现行
【国别】:
【发布日期】:2006
【实施或试行日期】:
【发布单位】:美国材料与试验协会(US-ASTM)
【起草单位】:D04.21
【标准类型】:(Practice)
【标准水平】:()
【中文主题词】:器具;地沥青;紧凑型;干燥;样品;真空干燥
【英文主题词】:
【摘要】:Specimendryweightisacriticalmeasureindeterminationofaccuratedensityandmanyothertestsintheconstructionandrawmaterialsindustries.Dryingspecimensatroomtemperatureisrequiredforsometestsandprovidesanadvantageforotherteststoensuretheintegrityandtopreservethecharacteristicsofspecimens.Thispracticecoversdryingcompactedasphaltspecimensinavacuumchamberthatiscapableofkeepingthespecimenatclosetoroomtemperature.Avacuumpumpreducesthepressureinsidethechamber,thusallowingwatertoevaporateatlowtemperature.Sincethespecimennaturallycoolsduringtheevaporationprocess,makingwaterhardertoevaporate,itisimportanttohavepropertemperaturecontrolsinthechambertoensurespecimenremainsatclosetoroomtemperature.Automaticcontrolswithintheunitallowthespecimentoremainatclosetoroomtemperaturebyperiodicallyallowingaflowofwarmairtoenterthevacuumchamber.Cyclingbetweenvacuumandairflowconditionsallowsthespecimentodryinashortperiodoftime.Completelysaturatedspecimenswithover30gofretainedwatercanbedriedinabout30minutes.Formostfieldcoresthatarenotcompletelysaturatedthedryingtimeisgenerallylessthan15minutes.Note18212;Cycletime(period)candependonthematerialcomposition.Eachcycleinvolvesanalternatingperiodof30to180secondsofvacuumoperationand30to120secondsofairflow.Thismethodcanbeusedfor100mmdiameter,150mmdiametercylindrical,andcubicalcompactedbituminousspecimens.Thismethodcanalsobeusedfordryinglooseasphaltmixtures,aggregatesamplesandothersolidspecimens.Followmanufacturersrecommendedproceduresfordryingspecimensotherthancompactedbituminousspecimens.Thismethodcanbeusedtodeterminemoisturecontentandamountofwaterlossduringdryingbyweighingthesamplebeforeandafterthedryingoperations.1.1Thispracticecoverstheprocessofdryingcompactedasphaltspecimensusingvacuumdryingapparatus.1.2Thespecimensdriedbythispracticeremainatroomtemperature,whichhelpsinmaintainingspecimenintegrityduringthedryingprocess.1.3Thispracticecanbeusedforcompactedcylindricalandcubicalbituminouslaboratoryandfieldspecimens1.4Thispracticecanalsobeusedfordryingotherconstructionmaterialssuchasconcrete,soils,aggregatesandlooseasphaltmixtures.Usemanufacturersrecommendationsfordryingotherconstructionmaterials.1.5ThevaluesstatedinSIunitsaretoberegardedasthestandard.Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappropriatesafetyandhealthpracticesanddeterminetheapplicabilityofregulatoryrequirementspriortouse.
【中国标准分类号】:E43
【国际标准分类号】:91_100_50
【页数】:3P.;A4
【正文语种】:
【英文标准名称】:StandardTestMethodforDeterminationofAbrasionandSmudgeResistanceofImagesProducedfromBusinessCopyProducts(SutherlandMethod)
【原文标准名称】:由办公复制品产生的图象抗磨抗污性能测定的标准试验方法(萨瑟兰法)
【标准号】:ASTMF1571-1995(2008)
【标准状态】:现行
【国别】:美国
【发布日期】:1995
【实施或试行日期】:
【发布单位】:美国材料与试验协会(US-ASTM)
【起草单位】:F05.02
【标准类型】:(TestMethod)
【标准水平】:()
【中文主题词】:
【英文主题词】:abrasion;abrasionresistance;densitometer;imagepermanence;impactprinter;printedmatter;reflectometer;smudge;Sutherland;typewriterribbon;Impactprinters;Printedmatter;Reflectometer/reflectrometry;Smudge;Sutherlandinkrubtester;Typewrit
【摘要】:Thistestmethodisdesignedtosimulatethetypeofdamageresultingfrompaperrubbingagainstaprintedimage.Theprimarymethodofevaluationiseitherreflectanceoropticaldensityreadings.Dependingupontheobjectiveofthetest,comparisonofeithertheimageortheareaadjacenttotheimageisevaluatedbeforeandafterrubbing.Thistestmethodcanbeusedforcontrolofproductqualityaswellasaresearchanddevelopmenttool.Aswrittenthistestmethodisintendedforuseonlywithimpactprintedimagesinvolvingribbons.However,itcanbemodifiedtoevaluateothertypesofbusinessimagessuchasthoseproducedbynon-impactprintersandcopiers,inkjetprinters,andthermaltransferprinters.Thedegreeofimagetransferredbyrubbingfromaprintedimagecanbeaffectedbyvariousfactorsincludingthetypeofprinter,theconditionoftheunit,suppliesemployed,timesinceimaging,andenvironmentalconditions.Asmanyaspossibleofthesevariablesshouldbecontrolledduringthetest.Acontrolsamplewithknowncharacteristics,ifavailable,shouldberunalongwiththetestsamples.1.1Thistestmethodcoversaprocedurefordeterminingtheamountofimagetransferredfromonesiteandredepositedatanothersite(smudge)onadocument.TheSutherlandInkRubTesterwith4-lb(1.82-kg)testblockisthetestinstrumentforproducingthetransferandeitherareflectometerordensitometerisemployedformeasuringthechangeinimages.Alternatively,avisualratingordercanbeemployedtoestablisharankingorder.Thedegreetowhichtheoriginalimageisunaltereduponrubbingisconsideredtobetheabrasionresistance.1.2Thistestmethodcanbeemployedtoevaluatethesmudgeresistanceofbusinessimagingproductsproducedbytypewriters,andimpactprinters.1.3Thistestmethodcanalsobeemployedtomeasureperformancecharacteristicsforaproduct.Theusershouldselecttestequipmentthatisappropriateformeasuringthedegreeofabrasiontothesamples.Samplesaretestedbeforeandafterrubbingandcomparisonsofresultsmade.Inthistestmethodproductperformanceevaluationsareoptional.1.4OthertestmethodsemployingtheCrockmeter,TaberAbrader,andGavartiGA-C.A.T.canbeemployedtoevaluatethesmudgeandabrasioncharacteristics.ResultsbytheseunitsarenotnecessarilyequivalenttothoseobtainedwiththeSutherland.1.5Thevaluesstatedininch-poundunitsaretoberegardedasthestandard.TheSIunitsgiveninparenthesesareforinformationonly.1.6Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappropriatesafetyandhealthpracticesanddeterminetheapplicabilityofregulatorylimitationspriortouse.
【中国标准分类号】:Y54
【国际标准分类号】:37_100_10
【页数】:5P.;A4
【正文语种】:英语
