ASTM C88-2005 用硫酸钠或硫酸镁测试集料坚固性的标准试验方法

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【英文标准名称】:StandardTestMethodforSoundnessofAggregatesbyUseofSodiumSulfateorMagnesiumSulfate
【原文标准名称】:用硫酸钠或硫酸镁测试集料坚固性的标准试验方法
【标准号】:ASTMC88-2005
【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】:C09.20
【标准类型】:(TestMethod)
【标准水平】:()
【中文主题词】:施工材料;建筑;集料;坚固性;硫酸镁;试验;硫酸钠
【英文主题词】:aggregate;magnesiumsulfate;soduimsulfate;soundness;weathering
【摘要】:Thistestmethodprovidesaprocedureformakingapreliminaryestimateofthesoundnessofaggregatesforuseinconcreteandotherpurposes.Thevaluesobtainedmaybecomparedwithspecifications,forexampleSpecificationC33,thataredesignedtoindicatethesuitabilityofaggregateproposedforuse.Sincetheprecisionofthistestmethodispoor(Section12),itmaynotbesuitableforoutrightrejectionofaggregateswithoutconfirmationfromothertestsmorecloselyrelatedtothespecificserviceintended.Valuesforthepermitted-losspercentagebythistestmethodareusuallydifferentforfineandcoarseaggregates,andattentioniscalledtothefactthattestresultsbyuseofthetwosaltsdifferconsiderablyandcaremustbeexercisedinfixingproperlimitsinanyspecificationsthatincluderequirementsforthesetests.Thetestisusuallymoreseverewhenmagnesiumsulfateisused;accordingly,limitsforpercentlossallowedwhenmagnesiumsulfateisusedarenormallyhigherthanlimitswhensodiumsulfateisused.Note18212;RefertotheappropriatesectionsinSpecificationC33establishingconditionsforacceptanceofcoarseandfineaggregateswhichfailtomeetrequirementsbasedonthistest.1.1Thistestmethodcoversthetestingofaggregatestoestimatetheirsoundnesswhensubjectedtoweatheringactioninconcreteorotherapplications.Thisisaccomplishedbyrepeatedimmersioninsaturatedsolutionsofsodiumormagnesiumsulfatefollowedbyovendryingtopartiallyorcompletelydehydratethesaltprecipitatedinpermeableporespaces.Theinternalexpansiveforce,derivedfromtherehydrationofthesaltuponre-immersion,simulatestheexpansionofwateronfreezing.Thistestmethodfurnishesinformationhelpfulinjudgingthesoundnessofaggregateswhenadequateinformationisnotavailablefromservicerecordsofthematerialexposedtoactualweatheringconditions.1.2Thevaluesgiveninparenthesesareprovidedforinformationpurposesonly.1.3Thisstandarddoesnotpurporttoaddressthesafetyproblemsassociatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappropriatesafetyandhealthpracticesanddeterminetheapplicabilityofregulatorylimitationspriortouse.
【中国标准分类号】:Q13
【国际标准分类号】:91_100_30
【页数】:5P.;A4
【正文语种】: