ASTM D5334-2008 热针探头法测定土壤和软石导热性的标准试验方法

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【英文标准名称】:StandardTestMethodforDeterminationofThermalConductivityofSoilandSoftRockbyThermalNeedleProbeProcedure
【原文标准名称】:热针探头法测定土壤和软石导热性的标准试验方法
【标准号】:ASTMD5334-2008
【标准状态】:现行
【国别】:美国
【发布日期】:2008
【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】:D18.12
【标准类型】:(TestMethod)
【标准水平】:()
【中文主题词】:
【英文主题词】:heatflow;temperature;thermalconductivity;thermalprobe;thermalproperties;Heatflow;Rockmaterials/properties/analysis;Softrock;Soil;Temperaturetests--soil/rock/relatedmaterials;Thermalanalysis(TA)--soil/rock;Thermalconductance/conducti
【摘要】:Thethermalconductivityofbothundisturbedandremoldedsoilspecimensaswellassoftrockspecimensisusedtoanalyzeanddesignsystemsused,forexample,inundergroundtransmissionlines,oilandgaspipelines,radioactivewastedisposal,andsolarthermalstoragefacilities.Note18212;Notwithstandingthestatementsonprecisionandbiascontainedinthistestmethod;theprecisionofthistestmethodisdependentonthecompetenceofthepersonnelperformingit,andthesuitabilityoftheequipmentandfacilitiesused.AgenciesthatmeetthecriteriaofPracticeD3740aregenerallyconsideredcapableofcompetentandobjectivetesting.UsersofthistestmethodarecautionedthatcompliancewithPracticeD3740doesnotinitselfassurereliabletesting.Reliabletestingdependsonmanyfactors;PracticeD3740providesameansofevaluatingsomeofthosefactors.1.1Thistestmethodpresentsaprocedurefordeterminingthethermalconductivityofsoilandsoftrockusingatransientheatmethod.Thistestmethodisapplicableforbothundisturbedandremoldedsoilspecimensandsoftrockspecimens.Thistestmethodissuitableonlyforisotropicmaterials.1.2Thistestmethodisapplicabletodrymaterialsoverawidetemperaturerangefromx003C;0to>100x00B0;C,dependingonthesuitabilityofthethermalneedleprobeconstructiontotemperatureextremes.Thismethodmayalsobeusedforspecimenscontainingmoisture.However,caremustbetakentopreventsignificanterrorfrom:(1)redistributionofwaterduetothermalgradientsresultingfromheatingoftheneedleprobe,and(2)phasechange(melting)oficeinspecimenswithtemperaturesx003C;0x00B0;C.Bothoftheseerrorscanbeminimizedbyaddinglesstotalheattothespecimeneitherthroughminimizingpowerappliedtotheneedleprobeand/orminimizingtheheatingdurationofthemeasurement.1.3Forsatisfactoryresultsinconformancewiththistestmethod,theprinciplesgoverningthesize,construction,anduseoftheapparatusdescribedinthistestmethodshouldbefollowed.Iftheresultsaretobereportedashavingbeenobtainedbythistestmethod,thenallpertinentrequirementsprescribedinthistestmethodshallbemet.1.4Itisnotpracticableinatestmethodofthistypetoaimtoestablishdetailsofconstructionandproceduretocoverallcontingenciesthatmightofferdifficultiestoapersonwithouttechnicalknowledgeconcerningthetheoryofheatflow,temperaturemeasurement,andgeneraltestingpractices.Standardizationofthistestmethoddoesnotreducetheneedforsuchtechnicalknowledge.Itisrecognizedalsothatitwouldbeunwise,becauseofthestandardizationofthistestmethod,toresistinanywaythefurtherdevelopmentofimprovedornewmethodsorproceduresbyresearchworkers.1.5ThevaluesstatedinSIunitsaretoberegardedasthestandard.Theinch-poundunitsgiveninparenthesesareforinformationonly.1.6AllmeasuredandcalculatedvaluesshallconformtotheguidelinesforsignificantdigitsandroundingestablishedInPracticeD6026.1.7Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappropriatesafetyandhealthpracticesanddeterminetheapplicabilityofregulatorylimitationspriortouse.
【中国标准分类号】:P13
【国际标准分类号】:13_080_20
【页数】:8P.;A4
【正文语种】:英语