【英文标准名称】:StandardTestMethodsforLaboratoryDeterminationofDensity(UnitWeight)ofSoilSpecimens
【原文标准名称】:实验室测定土壤样品的密度(单位重量)的标准试验方法
【标准号】:ASTMD7263-2009
【标准状态】:现行
【国别】:美国
【发布日期】:2009
【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】:D18.03
【标准类型】:(TestMethod)
【标准水平】:()
【中文主题词】:
【英文主题词】:density;porosity;saturation;specimen;unitweight;voidratio
【摘要】:Drydensity,asdefinedasx201C;densityofsoilorrockx201D;inTerminologyD653andx201C;bulkdensityx201D;bysoilscientists,canbeusedtoconvertthewaterfractionofsoilfromamassbasistoavolumebasisandvise-versa.Whenparticledensity,thatis,specificgravity(TestMethodsD854)isalsoknown,drydensitycanbeusedtocalculateporosityandvoidratio(seeAppendixX1).Drydensitymeasurementsarealsousefulfordeterminingdegreeofsoilcompaction.Sincemoisturecontentisvariable,moistsoildensityprovideslittleusefulinformationexcepttoestimatetheweightofsoilperunitvolume,forexample,poundspercubicyard,atthetimeofsampling.Sincesoilvolumeshrinkswithdryingofswellingsoils,bulkdensitywillvarywithmoisturecontent.Hence,thewatercontentofthesoilshouldbedeterminedatthetimeofsampling.Densities(unitweights)ofremolded/reconstitutedspecimensarecommonlyusedtoevaluatethedegreeofcompactionofearthenfills,embankments,etc.Drydensityvaluesareusuallyusedinconjunctionwithcompactioncurvevalues(TestMethodsD698andD1557).Density(unitweight)isoneofthekeycomponentsindeterminingthemasscomposition/phaserelationsofsoil,seeAppendixX1.Note18212;Thequalityoftheresultproducedbythisstandardisdependentonthecompetenceofthepersonnelperformingitandthesuitabilityoftheequipmentandfacilitiesused.AgenciesthatmeetthecriteriaofPracticeD3740aregenerallyconsideredcapableofcompetentandobjectivetesting/sampling/inspection/etc.UsersofthisstandardarecautionedthatcompliancewithPracticeD3740doesnotinitselfassurereliableresults.Reliableresultsdependonseveralfactors;PracticeD3740providesameansofevaluatingsomeofthesefactors.1.1Thesetestmethodsdescribetwowaysofdeterminingthetotal/moistanddrydensities(unitweights)ofintact,disturbed,remolded,andreconstituted(compacted)soilspecimens.Density(unitweight)asusedinthisstandardmeansthesameasx201C;bulkdensityx201D;ofsoilasdefinedbytheSoilScienceSocietyofAmerica.Intactspecimensmaybeobtainedfromthin-walledsamplingtubes,blocksamples,orclods.Specimensthatareremoldedbydynamicorstaticcompactionproceduresmayalsobemeasuredbythesemethods.Thesemethodsapplytosoilsthatwillretaintheirshapeduringthemeasurementprocessandmayalsoapplytoothermaterialssuchassoil-cement,soil-lime,soil-bentoniteorsolidifiedsoil-bentonite-cementslurries.Itiscommonforthedensity(unitweight)ofspecimensafterremovalfromsamplingtubesandcompactionmoldstobelessthanthevaluebasedontubeormoldvolumes,orofin-situconditions.Thisisduetothespecimenswellingafterremovaloflateralpressures.1.1.1MethodAcoverstheprocedureformeasuringthevolumeofwaxcoatedspecimensbydeterminingthequantityofwaterdisplaced.1.1.1.1Thismethodonlyappliestospecimensinwhichthewaxwillnotpenetratetheoutersurfaceofthespecimen.1.1.2MethodBcoverstheprocedurebymeansofthedirectmeasurementofthedimensionsandmassofaspecimen,usuallyoneofcylindricalshape.Intactandreconstituted/remoldedspecimensmaybetestedbythismethodinconjunctionwithstrength,permeability(air/water)andcompressibilitydeterminations.1.2ThevaluesstatedinSIunitsare......
【中国标准分类号】:B11
【国际标准分类号】:13_080_20
【页数】:7P.;A4
【正文语种】:英语
基本信息
| 标准名称： | 隐丝式光学高温计 |
| 英文名称： | Disappearing-filament optical pyrometer |
| 中标分类： |
仪器、仪表 >>
工业自动化仪表与控制装置 >>
温度与压力仪表 |
| ICS分类： |
计量学和测量、物理现象 >>
热力学和温度测量 >>
温度测量仪器仪表
|
| 替代情况： | JB 2167-1977 |
| 发布日期： | 1999-08-06 |
| 实施日期： | 2000-01-01 |
| 首发日期： | 1900-01-01 |
| 作废日期： | 1900-01-01 |
| 归口单位： | 全国工业过程测量和控制标准化技术委员会 |
| 出版日期： | 1900-01-01 |
| 页数： | 12页 |
| 批文号： | 国机管[1999]420 |
适用范围
本标准规定了隐丝式光学高温计的基本参数、技术要求、试验方法、检验规则、标志、包装和贮存。
前言
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引用标准
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所属分类： 仪器 仪表 工业自动化仪表与控制装置 温度与压力仪表 计量学和测量 物理现象 热力学和温度测量 温度测量仪器仪表