【英文标准名称】:StandardTestMethodsforAmountofMaterialinSoilsFinerthanNo.200(75-956;m)Sieve
【原文标准名称】:测定土壤中细于200号筛孔(75μm)的土壤总量的标准试验方法
【标准号】:ASTMD1140-2000(2006)
【标准状态】:现行
【国别】:
【发布日期】:2000
【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】:砌块;建筑;施工材料;含量测定;土工织物;材料数量;天然石料;岩石;筛选(大小);土壤;石;试验
【英文主题词】:fines;particlesizes;sieveanalysis;washing
【摘要】:Materialfinerthanthe75-x03BC;m(No.200)sievecanbeseparatedfromlargerparticlesmuchmoreefficientlyandcompletelybywetsievingthanwithdrysieving.Therefore,whenaccuratedeterminationsofmaterialfinerthan75-x03BC;msieveinsoilaredesired,thistestmethodisusedonthetestspecimenpriortodrysieving.Usuallytheadditionalamountofmaterialfinerthan75-x03BC;msieveobtainedinthedrysievingprocessisasmallamount.Ifitislarge,theefficiencyofthewashingoperationshouldbechecked,asitcouldbeanindicationofdegradationofthesoil.Withsomesoils,particularlyclayeysoils,inordertokeepthefinermaterialfromadheringtothelargerparticles,itwillbenecessarytosoakthesoilpriortowashingitthroughthesieve.Adeflocculatingagent(dispersingagent)shouldbeaddedtothesoilwhenitissoaked.Note18212;Thequalityoftheresultproducedbythisstandardisdependentonthecompetenceofthepersonnelperformingit,andthesuitabilityoftheequipmentandfacilitiesused.AgenciesthatmeetthecriteriaofPracticeD3740aregenerallyconsideredcapableofcompetentandobjectivetesting/sampling/inspection/etc.UsersofthisstandardarecautionedthatcompliancewithPracticeD3740doesnotinitselfassurereliableresults.Reliableresultsdependonmanyfactors;PracticeD3740providesameansofevaluatingsomeofthosefactors.1.1Thesetestmethodscoverdeterminationoftheamountofmaterialfinerthana75-m(No.200)sievebywashing.1.2TwomethodsfordeterminingtheamountofmaterialfinerthantheNo.200sieveareprovided.Themethodtobeusedshallbespecifiedbytherequestingauthority.Ifnomethodisspecified,thechoiceshouldbebasedontheguidancegivenin4.2and7.31.2.1MethodA-Testspecimenisnotdispersedpriortowashsieving.1.2.2MethodB-Testspecimenisdispersedbysoakinginwatercontainingadeflocculatingagentpriortowashsieving.1.3ThevaluesstatedinSIunitsaretoberegardedasthestandard.Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappropriatesafetyandhealthpracticesanddeterminetheapplicabilityofregulatorylimitationspriortouse.
【中国标准分类号】:B10
【国际标准分类号】:19_120
【页数】:4P.;A4
【正文语种】: