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【英文标准名称】:StandardTestMethodforDeterminationofRockHardnessbyReboundHammerMethod
【原文标准名称】:用回弹锤法测定岩石硬度的标准试验方法
【标准号】:ASTMD5873-2005
【标准状态】:现行
【国别】:
【发布日期】:2005
【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】:D18.12
【标准类型】:(TestMethod)
【标准水平】:()
【中文主题词】:测定;锤击试验;硬度;岩石;土壤;试验方法
【英文主题词】:core;hardness;rockmass;rock;unconfinedcompressivestrength
【摘要】:Thereboundhardnessmethodprovidesameansforrapidclassificationofthehardnessofrockduringsitecharacterizationforengineering,design,andconstructionpurposes(seeGuideD420),geotechnicalmappingoflargeundergroundopeningsinrock(seeGuideD4879),orreportingthephysicaldescriptionofrockcore(seePracticeD4543).Thereboundhardnessnumber,Hr,canserveinavarietyofengineeringapplicationsthatrequirecharacterizationofrockmaterial.Theseapplicationsinclude,forexamples,thepredictionofpenetrationratesfortunnelboringmachines,determinationofrockqualityforconstructionpurposes,andpredictionofhydraulicerodibilityofrock.Thistestmethodisoflimiteduseonverysoftrockorveryhardrock(unconfinedcompressivestrengthslessthanapproximately1MPaorgreaterthan100MPa).Theresultsofthistestmethodarenotintendedforconversiontostrengthdatasuitablefordesign.Note18212;Severaltypesofreboundhammersarecommerciallyavailabletoaccommodatetestingofvarioussizesandtypesofconcreteconstruction(SeeTestMethodC805)androckmaterial.Note28212;Thequalityoftheresultproducedbythisstandardisdependentonthecompetenceofthepersonnelperformingit,andthesuitabilityoftheequipmentandfacilitiesused.AgenciesthatmeetthecriteriaofPracticeD3740aregenerallyconsideredcapableofcompetentandobjectivetestingandsampling.UsersofthisstandardarecautionedthatcompliancewithPracticeD3740doesnotinitselfassurereliableresults.Reliableresultsdependonmanyfactors;PracticeD3740providesameansofevaluatingsomeofthosefactors.1.1Thistestmethodcoversthetestingapparatus,sampling,testspecimenpreparation,andtestingproceduresfordeterminingthereboundhardnessnumberofrockmaterialusingaspring-drivensteelhammer,referredtovariouslyasareboundhammer,impacttesthammer,orconcretetesthammer.1.2Thistestmethodisbestsuitedforrockmaterialwithuniaxialcompressivestrengths(seeTestMethodD7012)rangingbetweenapproximately1and100MPa.1.3Theportabletestingapparatusmaybeusedinthelaboratoryorfieldtoprovideameansofrapidassessmentofrockhardnessortoserveasanindicatorofrockhardness.1.4ThevaluesstatedinSIunitsaretoberegardedasthestandard.1.5Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappropriatesafetyandhealthpracticesanddeterminetheapplicabilityofregulatorylimitationspriortouse.
【中国标准分类号】:D04
【国际标准分类号】:
【页数】:3P.;A4
【正文语种】: