ASTM C1260-2007 集料潜在碱性反应用标准试验方法(灰浆棒法)
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【英文标准名称】:StandardTestMethodforPotentialAlkaliReactivityofAggregates(Mortar-BarMethod)
【原文标准名称】:集料潜在碱性反应用标准试验方法(灰浆棒法)
【标准号】:ASTMC1260-2007
【标准状态】:现行
【国别】:
【发布日期】:2007
【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】:C09.26
【标准类型】:(TestMethod)
【标准水平】:()
【中文主题词】:集料;碱金属;灰浆;反应
【英文主题词】:aggregate;alkali-silicareactivity;lengthchange;mortar;sodiumhydroxide
【摘要】:Thistestmethodprovidesameansofdetectingthepotentialofanaggregateintendedforuseinconcreteforundergoingalkali-silicareactionresultinginpotentiallydeleteriousinternalexpansion.ItisbasedontheNBRIAcceleratedTestMethod(1-4).3Itisespeciallyusefulforaggregatesthatreactslowlyorproduceexpansionlateinthereaction.However,itdoesnotevaluatecombinationsofaggregateswithcementitiousmaterialsnorarethetestconditionsrepresentativeofthoseencounteredbyconcreteinservice.BecausethespecimensareexposedtoaNaOHsolution,thealkalicontentofthecementisnotasignificantfactorinaffectingexpansions.Whenexcessiveexpansions(seeAppendixX1)areobserved,itisrecommendedthatsupplementaryinformationbedevelopedtoconfirmthattheexpansionisactuallyduetoalkali-silicareaction.Sourcesofsuchsupplementaryinformationinclude:(1)petrographicexaminationoftheaggregate(GuideC295)todetermineifknownreactiveconstituentsarepresent;(2)examinationofthespecimensaftertests(PracticeC856)toidentifytheproductsofalkalireaction;and(3)whereavailable,fieldservicerecordscanbeusedintheassessmentofperformance.Whenithasbeenconcludedfromtheresultsoftestsperformedusingthistestmethodandsupplementaryinformationthatagivenaggregateshouldbeconsideredpotentiallydeleteriouslyreactive,theuseofmitigativemeasuressuchaslow-alkaliportlandcement,mineraladmixtures,orgroundgranulatedblast-furnaceslagshouldbeevaluated(seelastsentenceof4.1).1.1Thistestmethodpermitsdetection,within16days,ofthepotentialfordeleteriousalkali-silicareactionofaggregateinmortarbars.1.2ThevaluesstatedinSIunitsaretoberegardedasstandard.Thevaluesininch-poundunitsareshowninparentheses,andareforinformationalpurposesonly.Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappropriatesafetyandhealthpracticesanddeterminetheapplicabilityofregulatorylimitationspriortouse.AspecificprecautionarystatementisgiveninthesectiononReagents.
【中国标准分类号】:Q13
【国际标准分类号】:91_100_10
【页数】:5P.;A4
【正文语种】:
【原文标准名称】:集料潜在碱性反应用标准试验方法(灰浆棒法)
【标准号】:ASTMC1260-2007
【标准状态】:现行
【国别】:
【发布日期】:2007
【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】:C09.26
【标准类型】:(TestMethod)
【标准水平】:()
【中文主题词】:集料;碱金属;灰浆;反应
【英文主题词】:aggregate;alkali-silicareactivity;lengthchange;mortar;sodiumhydroxide
【摘要】:Thistestmethodprovidesameansofdetectingthepotentialofanaggregateintendedforuseinconcreteforundergoingalkali-silicareactionresultinginpotentiallydeleteriousinternalexpansion.ItisbasedontheNBRIAcceleratedTestMethod(1-4).3Itisespeciallyusefulforaggregatesthatreactslowlyorproduceexpansionlateinthereaction.However,itdoesnotevaluatecombinationsofaggregateswithcementitiousmaterialsnorarethetestconditionsrepresentativeofthoseencounteredbyconcreteinservice.BecausethespecimensareexposedtoaNaOHsolution,thealkalicontentofthecementisnotasignificantfactorinaffectingexpansions.Whenexcessiveexpansions(seeAppendixX1)areobserved,itisrecommendedthatsupplementaryinformationbedevelopedtoconfirmthattheexpansionisactuallyduetoalkali-silicareaction.Sourcesofsuchsupplementaryinformationinclude:(1)petrographicexaminationoftheaggregate(GuideC295)todetermineifknownreactiveconstituentsarepresent;(2)examinationofthespecimensaftertests(PracticeC856)toidentifytheproductsofalkalireaction;and(3)whereavailable,fieldservicerecordscanbeusedintheassessmentofperformance.Whenithasbeenconcludedfromtheresultsoftestsperformedusingthistestmethodandsupplementaryinformationthatagivenaggregateshouldbeconsideredpotentiallydeleteriouslyreactive,theuseofmitigativemeasuressuchaslow-alkaliportlandcement,mineraladmixtures,orgroundgranulatedblast-furnaceslagshouldbeevaluated(seelastsentenceof4.1).1.1Thistestmethodpermitsdetection,within16days,ofthepotentialfordeleteriousalkali-silicareactionofaggregateinmortarbars.1.2ThevaluesstatedinSIunitsaretoberegardedasstandard.Thevaluesininch-poundunitsareshowninparentheses,andareforinformationalpurposesonly.Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappropriatesafetyandhealthpracticesanddeterminetheapplicabilityofregulatorylimitationspriortouse.AspecificprecautionarystatementisgiveninthesectiononReagents.
【中国标准分类号】:Q13
【国际标准分类号】:91_100_10
【页数】:5P.;A4
【正文语种】:
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