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【英文标准名称】:StandardTestMethodforPoreWaterExtractionandDeterminationoftheSolubleSaltContentofSoilsbyRefractometer
【原文标准名称】:用折射计测定土壤中可溶盐含量和孔隙水萃取的标准试验方法
【标准号】:ASTMD4542-2007
【标准状态】:现行
【国别】:
【发布日期】:2007
【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】:D18.06
【标准类型】:(TestMethod)
【标准水平】:()
【中文主题词】:折射计;盐度;土壤;试验方法
【英文主题词】:marinesoils;porewater;refractometer;saltcontent;solublesalt;solublesaltcontent
【摘要】:Thesolublesaltcontentmaybeusedtocorrecttheindexpropertiesofsoils(watercontent,voidratio,specificgravity,degreeofsaturation,anddrydensity).Itisnecessarytominimizethetimeperiodbetweensamplingandtestingduetochemicalchangeswhichmayoccurwithinthesoilsample.Note18212;Thequalityoftheresultproducedbythisstandardisdependentonthecompetenceofthepersonnelperformingit,andthesuitabilityoftheequipmentandfacilitiesused.AgenciesthatmeetthecriteriaofPracticeD3740aregenerallyconsideredcapableofcompetentandobjectivetesting/sampling/inspection/etc.UsersofthisstandardarecautionedthatcompliancewithPracticeD3740doesnotinitselfassurereliableresults.Reliableresultsdependonmanyfactors;PracticeD3740providesameansofevaluatingsomeofthosefactors.Note28212;HulbertandBrindle(2)andTorrance(3)haveshownthatprolongedstorageshouldbeavoidedasunpredictableandnonreproduciblechemicalchangesmayoccur.1.1Thistestmethodcoversarapidprocedureforsqueezingporewaterfromfine-grainedsoilsforthepurposeofdeterminingtheamountofsolublesaltspresentintheextractedporewater.1.2Thistestmethodwasdevelopedforsoilshavingawatercontentequaltoorgreaterthanapproximately14%,forexample,marinesoils.AnextensivesummaryofproceduresforextractingporewaterfromsoilshasbeenpresentedbyKriukovandManheim(1).1.3Thistestmethodisnotgenerallyapplicablefordeterminingthesolublesaltcontentoftheporewaterextractedfromcoarse-grainedsoils,suchascleansandsandgravels.1.4ThevaluesstatedinSIunitsaretoberegardedasthestandard.Thevaluesgiveninparenthesesareforinformationonly.Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappropriatesafetyandhealthpracticesanddeterminetheapplicabilityofregulatorylimitationspriortouse.1.5AllobservedandcalculatedvaluesshallconformtotheguidelinesforsignificantdigitsandroundingestablishedinPracticeD6026.
【中国标准分类号】:B11
【国际标准分类号】:13_080_10
【页数】:6P.;A4
【正文语种】: