【英文标准名称】:StandardTestMethodforDensityofBituminousConcreteinPlacebyNuclearMethods
【原文标准名称】:用核技术现场测定沥青混凝土密度的标准试验方法
【标准号】:ASTMD2950-2005
【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】:D04.21
【标准类型】:(TestMethod)
【标准水平】:()
【中文主题词】:路面(道路);承重面的表面修饰;施工材料;表面;沥青;公路建设;密度;额定值;精整;材料;混凝土;建筑;试验
【英文主题词】:bituminous-concretedensity;density;in-placedensity;nucleartestmethod
【摘要】:Thetestmethoddescribedisusefulasarapid,nondestructivetechniquefordeterminingthein-placedensityofcompactedbituminousmixtures.Withpropercalibrationandconfirmationtesting,thetestmethodissuitableforqualitycontrolandacceptancetestingofcompactedbituminousconcrete.Thetestmethodcanbeusedtoestablishtheproperrollingeffortandpatterntoachievetherequireddensity.Thenon-destructivenatureofthetestallowsrepetitivemeasurementstobemadeatasingletestlocationbetweenrollerpassesandtomonitorchangesindensity.Thedensityresultsobtainedbythistestmethodarerelative.CorrelationwithothertestmethodssuchasD1188orD2726arerequiredtoconverttheresultsobtainedusingthismethodtoactualdensity.Itisrecommendedthatatleastsevencoredensitiesandsevennucleardensitiesbeusedtoestablishaconversionfactor.Anewfactormustbeestablishedatanytimeachangeismadeinthepavingmixtureorintheconstructionprocess.1.1Thistestmethoddescribesatestprocedurefordeterminingthedensityofbituminousconcretebytheattenuationofgammaradiation,wherethesourceanddetector(s)remainonthesurface(BackscatterMethod)orthesourceordetectorisplacedataknowndepthupto300mm(12in.)whilethedetectororsourceremainsonthesurface(DirectTransmissionMethod).1.2Thedensity,inmassperunitvolumeofthematerialundertest,isdeterminedbycomparingthedetectedrateofgammaemissionswithpreviouslyestablishedcalibrationdata.1.3Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappropriatesafetyandhealthpracticesanddeterminetheapplicabilityofregulatorylimitationspriortouse.ForspecificwarningstatementsseeSection6andNote4.1.4ThevaluesstatedinSIunitsaretoberegardedasthestandard.Theinch-poundequivalentsmaybeapproximate.
【中国标准分类号】:Q13
【国际标准分类号】:93_080_10
【页数】:5P.;A4
【正文语种】:


【英文标准名称】:High-StrengthButt-WeldingFittingsofWroughtHigh-StrengthLow-AlloySteel
【原文标准名称】:锻制高强度低合金钢的高强度对缝焊接配件
【标准号】:ASTMA860/A860M-1996
【标准状态】:作废
【国别】:美国
【发布日期】:1996
【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】:管道配件;配件;高抗拉;对接焊;合金钢;钢;焊接;可锻合金
【英文主题词】:pipefittings;steels;hightensile;buttwelding;wroughtalloys;fittings;alloysteels;welding
【摘要】:
【中国标准分类号】:J32
【国际标准分类号】:23_040_40
【页数】:
【正文语种】:英语