ASTM A648-2011 预应力混凝土管用冷拉钢丝的标准规格
时间:2024-05-09 08:48:30 来源: 标准资料网 作者：标准资料网 阅读：9118
【英文标准名称】:StandardSpecificationforSteelWire,HardDrawnforPrestressingConcretePipe
【原文标准名称】:预应力混凝土管用冷拉钢丝的标准规格
【标准号】:ASTMA648-2011
【标准状态】:现行
【国别】:
【发布日期】:2011
【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】:A01.05
【标准类型】:(Specification)
【标准水平】:()
【中文主题词】:预应力钢筋混凝土管道;预应力;钢丝;预应力混凝土;预变形钢
【英文主题词】:prestressedconcretepipe;prestressing;steelwire;Prestressedconcrete;Prestressingsteel
【摘要】:1.1Thisspecificationcoverstwoclassesofuncoated,high-strength,hard-drawnsteelwireforuseinthemanufactureofprestressedconcretepipe.Inapplication,thewireishelicallywrappedonthepipemaintainingtensionbymechanicalmeansnotincludingdrawingdies.1.2Thevaluesstatedininch-poundunitsaretoberegardedasstandard.ThevaluesgiveninparenthesesaremathematicalconversionstoSIunitsthatareprovidedforinformationonlyandarenotconsideredstandard.1.3Supplementaryrequirementsdescribehydrogenembrittlementresistancetestacceptancecriteria.1.4Thefollowingcaveatpertainsonlytothetestmethodportionsofthisspecification,6.2.3and6.4.3:Thisstandarddoesnotpurporttoaddressthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappropriatesafetyandhealthpracticesanddeterminetheapplicabilityofregulatorylimitationspriortouse.
【中国标准分类号】:
【国际标准分类号】:77_140_15
【页数】:5P.;A4
【正文语种】:
【英文标准名称】:StandardTestMethodforGrindabilityofCoalbytheHardgrove-MachineMethod
【原文标准名称】:粉碎机法测定煤炭可磨性的标准试验方法
【标准号】:ASTMD409-1997
【标准状态】:作废
【国别】:美国
【发布日期】:1997
【实施或试行日期】:
【发布单位】:美国材料与试验协会(ASTM)
【起草单位】:ASTM
【标准类型】:()
【标准水平】:()
【中文主题词】:试验;可磨性;固体燃料;燃料;煤
【英文主题词】:solidfuels;grindability;fuels;coal;testing
【摘要】:
【中国标准分类号】:D21
【国际标准分类号】:73_040
【页数】:9P;A4
【正文语种】:英语
【英文标准名称】:StandardTestMethodforDeterminingInSituModulusofDeformationofRockMassUsingFlexiblePlateLoadingMethod
【原文标准名称】:用挠性板负荷法测定岩石质量现场变形模数的标准试验方法
【标准号】:ASTMD4395-2008
【标准状态】:现行
【国别】:美国
【发布日期】:2008
【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】:
【英文主题词】:adit;deformation;displacement;fieldtesting;flexibleplateloadingmethod;fracturetesting;loadingtests;modulusofdeformation;pressuretesting;rock;stress;undergroundenvironments;Stress--rock;Undergroundenvironments;Adit;Defo
【摘要】:Resultsofthistypeoftestmethodareusedtopredictdisplacementsinrockmasscausedbyloadsfromastructureorfromundergroundconstruction.Itisoneofseveralteststhatshouldbeperformed.Theresultinginsitumodulusiscommonlylessthantheelasticmodulusdeterminedinthelaboratory.Themodulusisdeterminedusinganelasticsolutionforauniformlydistributedload(uniformstress)overacircularareaactingonasemi-infiniteelasticmedium.Thistestmethodisnormallyperformedatambienttemperature,butequipmentcanbemodifiedorsubstitutedforoperationsatothertemperatures.Note18212;Thequalityoftheresultproducedbythisstandardisdependentonthecompetenceofthepersonnelperformingit,andthesuitabilityoftheequipmentandfacilitiesused.AgenciesthatmeetthecriteriaofPracticeD3740aregenerallyconsideredcapableofcompetentandobjectivetesting/sampling/inspection,etc.UsersofthisstandardarecautionedthatcompliancewithPracticeD3740doesnotinitselfassurereliableresults.Reliableresultsdependonmanyfactors;PracticeD3740providesameansofevaluatingsomeofthosefactors.1.1Thistestmethodcoversthepreparation,equipment,testprocedure,anddatareductionfordetermininginsitumodulusofdeformationofarockmassusingtheflexibleplateloadingmethod.1.2Thistestmethodisdesignedtobeconductedinanaditorsmallundergroundchamber;however,withsuitablemodificationsitcouldbeconductedatthesurface.1.3Thistestmethodisusuallyconductedparallelorperpendiculartotheanticipatedaxisofthrust,asdictatedbythedesignload.1.4Time-dependenttestsnotcoveredbythisstandardcanbeperformedbutaretobereportedinanotherstandard.1.5AllobservedandcalculatedvaluesshallconformtotheguidelinesforsignificantdigitsandroundingestablishedinPracticeD6026.1.5.1Themethodusedtospecifiyhowdataarecollected,calculated,orrecordedinthisstandardisnotdirectlyrelatedtotheaccuracytowhichthedatacanbeappliedindesignorotheruses,orboth.Howoneappliestheresultsobtainedusingthisstandardisbeyonditsscope.1.6Thevaluesstatedininch-poundunitsaretoberegardedasstandard.ThevaluesgiveninparenthesesaremathematicalconversionstoSIunitsthatareprovidedforinformationonlyandarenotconsideredstandard.1.7Thereferencesappendedtothisstandardcontainfurtherinformationonthistestmethod.1.8Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappropriatesafetyandhealthpracticesanddeterminetheapplicabilityofregulatorylimitationspriortouse.Forspecificprecautionstatements,seeSection8.
【中国标准分类号】:P13
【国际标准分类号】:
【页数】:9P.;A4
【正文语种】:英语