【英文标准名称】:StandardTestMethodforDeterminingthePotentialAlkali-SilicaReactivityofCombinationsofCementitiousMaterialsandAggregate(AcceleratedMortar-BarMethod)
【原文标准名称】:粘结料和集料合成物对碱硅的潜在活性测定的标准试验方法(加速Mortar-Bar法)
【标准号】:ASTMC1567-2007
【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(ASTM)
【起草单位】:C09.26
【标准类型】:(TestMethod)
【标准水平】:()
【中文主题词】:加速的;集料;强碱;棒材;组合;测定;灰浆;潜在的;活性;硅酸盐
【英文主题词】:aggregate;alkali-silicareactivity;lengthchange;mortar;pozzolans,slag,sodiumhydroxide
【摘要】:Thistestmethodprovidesameansforevaluatingtheabilityofpozzolansandgroundgranulatedblast-furnaceslagtocontroldeleteriousinternalexpansionduetoalkali-silicareactionwhenusedwithanaggregateintendedforuseinconcrete.ItisbasedontheAcceleratedTestMethoddevelopedattheNationalBuildingResearchInstitute(NBRI)intheRepublicofSouthAfrica(1-4).3Resultsobtainedusingthistestmethodmayoverestimatethereactivityofsometypesofaggregatesifusedinservicewiththesamepozzolansorslagandhydrauliccementoflowalkalicontent.Differentlevelsofpozzolanandgroundgranulatedblast-furnaceslagmayrequiretestingtodeterminetheamountrequiredtoreduceexpansiontoanacceptablelevel.Pozzolansandgroundgranulatedblast-furnaceslagmaybetestedseparatelyorincombination.Itisrecommendedtotestthesameaggregateandhydrauliccement(withoutpozzolansandslag)usingTestMethodC1260.Thistestmethodmayunderestimatetheexpansionofcementitioussystemscontainingpozzolanswithanalkalicontent>4.0%sodiumoxideequivalent(7-9).ItisrecommendedthatsuchmaterialsbetestedusingTestMethodC1293.1.1Thistestmethodpermitsdetectionwithin16daysofthepotentialfordeleteriousalkali-silicareactionofcombinationsofcementitiousmaterialsandaggregateinmortarbars.Thecementitiousmaterialsarecomposedofvariousproportionsofhydrauliccement,pozzolansandgroundgranulatedblast-furnaceslag.1.2Thetestresultsareonlyvalidforthespecificcombinationsofpozzolan,slag,andreactiveaggregatestested.1.3Thistestisnotsuitableforevaluatingthepotentialfordeleteriousreactionofcombinationsofhydrauliccementandaggregate(thatis,intheabsenceofpozzolansorgroundgranulatedblast-furnaceslag).1.4ThevaluesstatedinSIunitsaretoberegardedasstandard.Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappropriatesafetyandhealthpracticesanddeterminetheapplicabilityofregulatorylimitationspriortouse.AspecificprecautionarystatementisgiveninthesectiononReagents.
【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】: