ASTM D7428-2008e1 使用微型台佛尔仪测量细精级料抗磨损降级的试验方法

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【英文标准名称】:StandardTestMethodforResistanceofFineAggregatetoDegradationbyAbrasionintheMicro-DevalApparatus
【原文标准名称】:使用微型台佛尔仪测量细精级料抗磨损降级的试验方法
【标准号】:ASTMD7428-2008e1
【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】:D04.51
【标准类型】:(TestMethod)
【标准水平】:()
【中文主题词】:
【英文主题词】:abrasionresistance;fineaggregate;micro-Deval;test;Abrasionresistance;Fineaggregate;Micro-Devalapparatus
【摘要】:TheMicro-Devalabrasiontestisatestoffineaggregatetodetermineabrasionlossinthepresenceofwaterandanabrasivecharge.Manyaggregatesaremoresusceptibletoabrasionwhenwetthandry,andtheuseofwaterinthistestincorporatesthisreductioninresistancetodegradation.Thetestresultsarehelpfulinevaluatingthetoughness/abrasionresistanceoffineaggregatesubjecttoabrasionwhenadequateinformationisnotavailablefromservicerecords.Thistestissuitableformeasuringtheamountofweak,softmaterialsuchasshaleorshaleycarbonateinfineaggregate.Materialsthatgivealowlossinthistestareunlikelytoexhibitsignificantdegradationduringhandling,mixingorplacing.ThereisarelationshipbetweendryingshrinkageofcementmortarandMicro-Devalabrasionlossoffineaggregate,withhigherlossmaterialsresultinginhigherdryingshrinkage.Descriptionsofthedevelopmentofthetestandtherelationshipwithotherpropertieshavebeenpublished.,,TheMicro-Devalabrasiontestonfineaggregateisusefulfordetectingchangesinpropertiesofaggregateproducedfromanaggregatesourceaspartofaqualitycontrolorqualityassuranceprocess.TheMicro-Devalabrasiontestonfineaggregate,incontrasttotheversiononcoarseaggregate,hasasignificantcorrelationwiththeMagnesiumSulfatesoundnesslossoffineaggregate.TheMicro-Devaltestonfineaggregatehasbetterprecisionthanthesulfatesoundnesstest,isquicker,andmaybeusedinplaceofthattest.Adviceonspecificvaluesforselectionofaggregatewillbefoundintheappendix.1.1ThistestmethodcoversaprocedurefortestingfineaggregateforresistancetoabrasionusingtheMicro-Devalapparatus.1.2ThevaluesstatedinSIunitsaretoberegardedasthestandard.1.3Thetextofthismethodreferencesnotesandfootnoteswhichprovideexplanatorymaterial.Thesenotesandfootnotes(excludingthoseintablesandfigures)shallnotbeconsideredasrequirementsofthetestmethod.1.4Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappropriatesafetyandhealthpracticesanddeterminetheapplicabilityofregulatorylimitationspriortouse.
【中国标准分类号】:Q13
【国际标准分类号】:91_100_30
【页数】:6P.;A4
【正文语种】:英语