ASTM A779/A779M-2010 预应力混凝土用应力消除未涂覆密实七股钢丝绞绳标准规范

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【英文标准名称】:StandardSpecificationforSteelStrand,Seven-Wire,Uncoated,Compacted,Stress-RelievedforPrestressedConcrete
【原文标准名称】:预应力混凝土用应力消除未涂覆密实七股钢丝绞绳标准规范
【标准号】:ASTMA779/A779M-2010
【标准状态】:现行
【国别】:
【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】:A01.05
【标准类型】:(Specification)
【标准水平】:()
【中文主题词】:密实绞绳;预应力混凝土;钢筋混凝土-规范;钢丝(钢筋混凝土应用)-规范;钢丝(预应力混凝土);钢丝绳-规范
【英文主题词】:compactedstrand(tendon);prestressedconcrete;Concretereinforcement--specifications;Prestressedconcrete;Steelwire(concretereinforcementapplications)--specifications;Steelwire(prestressedconcrete);Steelwirestrand--specifications
【摘要】:1.1Thisspecificationdescribesthreegradesofcompacted,seven-wire,uncoated,stress-relievedstrandforuseinpre-tensionedandpost-tensionedprestressedconcreteconstruction.1.2SupplementIdescribeslow-relaxationstrandandlow-relaxationtesting.1.3Thevaluesstatedineitherinch-poundorSIunitsaretoberegardedasstandard.Withinthetext,theinch-poundunitsareshowninparentheses.Thevaluesstatedineachsystemarenotexactequivalents;therefore,eachsystemshallbeusedindependentlyoftheother,withoutcombiningvaluesinanyway.
【中国标准分类号】:H49
【国际标准分类号】:29_060_01
【页数】:4P.;A4
【正文语种】:


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【英文标准名称】:StandardTestMethodforResidualVinylChlorideMonomerinPoly(VinylChloride)ResinsbyGasChromatographicHeadspaceTechnique
【原文标准名称】:用气相色谱液上技术测定聚氯乙烯树脂中残余氯乙烯单体的标准试验方法
【标准号】:ASTMD3749-2008
【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】:D20.70
【标准类型】:(TestMethod)
【标准水平】:()
【中文主题词】:
【英文主题词】:gaschromatography;headspacegaschromatography;poly(vinylchloride);vinylchloridemonomer;Headspacegaschromatography;Poly(vinylchloride)(PVC)resins;Vinylchloridemonomercontent;Gaschromatography(GC)--plastics
【摘要】:Poly(vinylchloride)resinsmustcontainaminimumpossibleamountofunreacted,orfree,VCM.ThistestmethodprovidesameasureofRVCMwhichissuitableformanufacturingcontrolorspecificationacceptancepurposes.Underoptimumconditions,alowerlevelofdetectionof2ppmbyvolumeVCMcanbedetectedintheheadspacevapor.Usinga4-gsample,thisisequivalenttoabout0.02ppmbymassRVCMinthePVCresin.1.1Thistestmethodissuitablefordeterminingtheresidualvinylchloridemonomer(RVCM)contentofpoly(vinylchloride)(PVC)homopolymerandcopolymerresinsforusesotherthanfoodcontact.Therangeforthistest,basedoninterlaboratoryevaluation,isfrom0.1to400ppmRVCM.1.2ThistestmethodcanbeadaptedtodeterminationsofRVCMinaPVCcopolymerresiniftheHenry''sLawconstantat90x00B0;Cforthatcopolymerisknown.1.3Thistestmethodcannotbeusedforpolymerinfusedforms,suchascubesorsheets.RefertoTestMethodD4443orTestMethodD3680forthesematerials.1.4ThistestmethodisproposedasanalternativetoEPAMethod107fordeterminationofvinylchloridemonomersindry-resinsamples.1.5ThevaluesstatedSIunitsaretoberegardedasthestandard.1.6Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappropriatesafetyandhealthpracticesanddeterminetheapplicabilityofregulatorylimitationspriortouse.Note18212;ThisstandardandISO6401:2008addressthesamesubjectmatter,butdifferintechnicalcontent.
【中国标准分类号】:G31
【国际标准分类号】:83_080_20
【页数】:4P.;A4
【正文语种】:英语


【英文标准名称】:StandardPracticesforPreservingandTransportingSoilSamples
【原文标准名称】:保存和运输土壤样品的标准实施规程
【标准号】:ASTMD4220-1995
【标准状态】:现行
【国别】:美国
【发布日期】:1995
【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】:施工材料;运输;保存;试样;土壤;建筑
【英文主题词】:Construction;Constructionmaterials;Preservation;Soils;Testspecimens;Transport
【摘要】:
【中国标准分类号】:P13
【国际标准分类号】:93_020
【页数】:11P;A4
【正文语种】:英语