【英文标准名称】:StandardTestMethodforIdentificationandClassificationofDispersiveClaySoilsbythePinholeTest
【原文标准名称】:用针孔试验做分散粘土识别和分类的标准试验方法
【标准号】:ASTMD4647-2006
【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】:D18.06
【标准类型】:(TestMethod)
【标准水平】:()
【中文主题词】:分类;识别;粘土;试验方法
【英文主题词】:clay;clay(dispersive);collodialerodibility;dispersibility;dispersivity;dispersion;dispersiveclays;erosion;pinhole;soils
【摘要】:1.1Thistestmethodpresentsadirect,qualitativemeasurementofthedispersibilityandconsequentcolloidalerodibilityofclaysoilsbycausingwatertoflowthroughasmallholepunchedinaspecimen.ThistestmethodiscomplementedbyTestMethodD4221.1.2Thistestmethodandthecriteriaforevaluatingtestdataarebaseduponresultsofseveralhundredtestsonsamplescollectedfromembankments,channels,andotherareaswhereclaysoilshaveerodedorresistederosioninnature(1).1.3Threealternativeproceduresforclassifyingthedispersibilityofclaysoilsareprovidedasfollows:1.3.1MethodAandMethodC,adaptedfromRef(1),classifysoilsintosixcategoriesofdispersivenessas:dispersibility(D1,D2),slighttomoderatelydispersive(ND4,ND3),andnondispersive(ND2,ND1).1.3.2MethodBclassifiessoilsintothreecategoriesofdispersivenessas:dispersibility(D),slightlydispersive(SD),andnondispersive(ND).1.4ThevaluesstatedinSIunitsaretoberegardedasthestandard.Thevaluesgiveninparenthesesareprovidedforinformationonly.Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappropriatesafetyandhealthpracticesanddeterminetheapplicabilityofregulatorylimitationspriortouse.
【中国标准分类号】:P21
【国际标准分类号】:93_020
【页数】:11P.;A4
【正文语种】: