ASTM D 1766-2001 橡胶化学制品的标准试验方法.溶解性

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【英文标准名称】:ProtectiveHeadgear-forMotorVehicularUsers-Specifications
【原文标准名称】:车辆驾驶员用防护头盔的规范
【标准号】:ANSIZ90.1-1971
【标准状态】:作废
【国别】:
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【发布单位】:美国国家标准学会(US-ANSI)
【起草单位】:
【标准类型】:()
【标准水平】:()
【中文主题词】:
【英文主题词】:
【摘要】:
【中国标准分类号】:
【国际标准分类号】:
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【英文标准名称】:StandardTestMethodforEnergyMeasurementforDynamicPenetrometers
【原文标准名称】:动态透度计能量测量的标准试验方法
【标准号】:ASTMD4633-2010
【标准状态】:现行
【国别】:美国
【发布日期】:2010
【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】:D18.02
【标准类型】:(TestMethod)
【标准水平】:()
【中文主题词】:
【英文主题词】:energy;liquefaction;N-value;penetrometer;SPT;standardpenetrationtest;Liquefaction;Penetrometertesting;Sampling;Soil;SPT(standardpenetrationtest)
【摘要】:Variousdriveninsitupenetrometersareusedtoevaluatetheengineeringbehaviorofsoils.TheStandardPenetrationTestisthemostcommontype.EngineeringpropertiescanbeestimatedonthebasisofempiricalcorrelationsbetweenN-valuesandsoildensity,strengthorstiffness.Alternatively,theN-valuecanbeuseddirectlyinfoundationdesignusingcorrelationstodesignparameterssuchasallowablebearingpressureorpilecapacity.TheN-valuedependsonthesoilpropertiesbutalsoonthemass,geometry,stroke,anvil,andoperatingefficiencyofthehammer.ThisenergymeasurementprocedurecanevaluatevariationsofN-valueresultingfromdifferencesinthehammersystem.SeealsoRefs(1-6).Thereisanapproximate,linearrelationshipbetweentheincrementalpenetrationofapenetrometerandtheenergyfromthehammerthatentersthedrillrods,andthereforeanapproximateinverserelationshipbetweentheN-valueandtheenergydeliveredtothedrillrods.Note18212;Sincethemeasuredenergyincludestheextrapotentialenergyeffectduetothesetperblow,testsforenergyevaluationofthehammersystemsshouldbelimitedtomoderateN-valuerangesbetween10and50(Ref(7)).Stresswaveenergymeasurementsonpenetrometersmayevaluatebothoperator-dependentcatheadandropehammersystemsandrelativelyoperator-independentautomaticsystems.TheenergymeasurementhasdirectapplicationforliquefactionevaluationforsandsasreferencedinPracticeD6066.ThistestmethodisusefulforcomparingtheN-valuesproducedbydifferentequipmentoroperatorsperformingSPTtestingatthesamesite,aidingthedesignofpenetrometersystems,trainingofdynamicpenetrometersystemoperators,anddevelopingconversionfactorsbetweendifferenttypesofdynamicpenetrationtests.Note28212;Thequalityoftheresultproducedbythisstandardisdependentonthecompetenceofthepersonnelperformingit,andthesuitabilityoftheequipmentandfacilitiesused.AgenciesthatmeetthecriteriaofPracticeD3740aregenerallyconsideredcapableofcompetentandobjectivetestingandinspection.UsersofthisstandardarecautionedthatcompliancewithPracticeD3740doesnotinitselfassurereliableresults.Reliableresultsdependonmanyfactors:PracticeD3740providesameansofevaluatingsomeofthosefactors.1.1Thistestmethoddescribesproceduresformeasuringtheenergythatentersthepenetrometerdrillrodstringduringdynamicpenetrometertestingofsoilduetothehammerimpact.1.2ThistesthasparticularapplicationtothecomparativeevaluationofN-valuesobtainedfromtheStandardPenetrationTests(SPT)ofsoilsinanopenholeasinTestMethodD1586andPracticeD6066.Thisproceduremayalsobeapplicabletootherdynamicpenetrometertests.1.3ThevaluesstatedinSIunitsaretoberegardedasstandard.Theinch-poundunitsgiveninparenthesesaremathematicalconversionswhichareprovidedforinformationpurposesonlyandarenotconsideredstandard.1.4Limitations8212;Thistestmethodappliestopenetrometer......
【中国标准分类号】:N74
【国际标准分类号】:19_060
【页数】:7P.;A4
【正文语种】:英语