ASTM C157/C157M-2008 硬化水泥灰浆和混凝土长度变化的标准试验方法

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【英文标准名称】:StandardTestMethodforLengthChangeofHardenedHydraulic-CementMortarandConcrete
【原文标准名称】:硬化水泥灰浆和混凝土长度变化的标准试验方法
【标准号】:ASTMC157/C157M-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】:C09.68
【标准类型】:(TestMethod)
【标准水平】:()
【中文主题词】:
【英文主题词】:lengthchange;mortarconcrete;Cementmortars;Changeinlength;Hardenedconcrete;Hydrauliccementconcrete;Volumetricmeasurement--cement/concrete
【摘要】:Measurementoflengthchangepermitsassessmentofthepotentialforvolumetricexpansionorcontractionofmortarorconcreteduetovariouscausesotherthanappliedforceortemperaturechange.Thistestmethodisparticularlyusefulforcomparativeevaluationofthispotentialindifferenthydraulic-cementmortarorconcretemixtures.Thistestmethodprovidesusefulinformationforexperimentalpurposesorforproductsthatrequiretestingundernonstandardmixing,placing,handling,orcuringconditions,suchashighproductworkabilityordifferentdemoldingtimes.Standardconditionsaredescribedin5.4.1.Ifconditionsformixing,curing,sampling,andstorageotherthanspecifiedinthistestmethodarerequired,theyshallbereportedbutarenottobeconsideredasstandardconditionsofthistestmethod.Nonstandardconditionsandthereasonsfordeparturefromstandardconditionsshallbereportedclearlyandprominentlywithcomparatorvalues.DESIG:C157/C157M08^TITLE:StandardTestMethodforLengthChangeofHardenedHydraulic-CementMortarandConcrete^SIGNUSE:Measurementoflengthchangepermitsassessmentofthepotentialforvolumetricexpansionorcontractionofmortarorconcreteduetovariouscausesotherthanappliedforceortemperaturechange.Thistestmethodisparticularlyusefulforcomparativeevaluationofthispotentialindifferenthydraulic-cementmortarorconcretemixtures.Thistestmethodprovidesusefulinformationforexperimentalpurposesorforproductsthatrequiretestingundernonstandardmixing,placing,handling,orcuringconditions,suchashighproductworkabilityordifferentdemoldingtimes.Standardconditionsaredescribedin5.4.1.Ifconditionsformixing,curing,sampling,andstorageotherthanspecifiedinthistestmethodarerequired,theyshallbereportedbutarenottobeconsideredasstandardconditionsofthistestmethod.Nonstandardconditionsandthereasonsfordeparturefromstandardconditionsshallbereportedclearlyandprominentlywithcomparatorvalues.^SCOPE:1.1Thistestmethodcoversthedeterminationofthelengthchangesthatareproducedbycausesotherthanexternallyappliedforcesandtemperaturechangesinhardenedhydraulic-cementmortarandconcretespecimensmadeinthelaboratoryandexposedtocontrolledconditionsoftemperatureandmoisture.1.2ThevaluesstatedineitherSIunitsorinch-poundunitsaretoberegardedseparatelyasstandard.Anexceptioniswithregardtosievesizesandnominalsizeofaggregate,inwhichtheSIvaluesarethestandardasstatedinSpecificationE11.Withinthetext,theSIunitsareshowninbrackets.Thevaluesstatedineachsystemmaynotbeexactequivalents;therefore,eachsystemshallbeusedindependentlyoftheother.Combiningvaluesfromthetwosystemsmayresultinnon-conformancewiththestandard.1.3Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappropriatesafetyandhealthpracticesanddeterminetheapplicabilityofregulatorylimitationspriortouse.^REFERENCE:ASTMStandards:C125TerminologyRelatingtoConcreteandConcreteAggregatesC143/C143MTestMethodforSlumpofHydraulic-CementConcreteC172PracticeforSamplingFreshlyMixedConcrete