【英文标准名称】:StandardTestMethodforEarlyStiffeningofHydraulicCement(MortarMethod)
【原文标准名称】:硅酸盐水泥早硬的标准试验方法(灰浆法)
【标准号】:ASTMC359-2008
【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】:C01.30
【标准类型】:(TestMethod)
【标准水平】:()
【中文主题词】:
【英文主题词】:earlystiffening;falseset;flashset;hydraulic-cementmortar;Cementmortars;Earlystiffening;Mortarmethod;Mortar(portlandcementmortar);Portlandcement;Stiffness
【摘要】:Thepurposeofthistestmethodistodeterminethedegreetowhichacementmortardevelopsearlystiffening.Itisintendedforusebythoseinterestedinmethodsfordeterminingthepotentialearlystiffeningofhydrauliccement.Whenusedforestimatingtherelativetendencyofacementtomanifestearlystiffening,ajudgmentmaybemadebycomparingthebehaviorinthepenetrationseries(see10.4.1and10.4.2)andtheremixprocedure(see10.4.3)todifferentiatearelativelylessseriousandlesspersistenttendencytoearlystiffening(falseset)fromonethatismorepersistentand,consequently,moreserious(flashset).Severefalsesettinginacementmaycausedifficultyfromaplacingandhandlingstandpoint,butitisnotlikelytocausedifficultieswhereconcreteismixedforalongertimethanusual,asusuallyoccursintransitmixing,orwhereitisremixedpriortoplacingortransporting,inconcretepumpingoperations.Itismostlikelynoticedwhereconcreteismixedforashortperiodoftimeinstationarymixersandtransportedtotheformsinnon-agitatingequipment,asonsomepavingjobs,andwhenconcreteismadeinanon-sitebatchplant.Cementswithseverefalsesettingusuallyrequireslightlymoremixingwatertoproducethesameconsistency,whichmayresultinslightlylowerstrengthsandincreaseddryingshrinkage.Earlystiffeningresultingfromfalsesetisnotlikelytocauseacementtofailtheapplicabletimeofsettingrequirement.Earlystiffeningresultingfromflashset,dependingonseverity,cancauseacementtofailtheapplicabletimeofsettingrequirement.1.1Thistestmethodcoversthedeterminationofearlystiffeninginhydraulic-cementmortar.1.2ThevaluesstatedinSIunitsaretoberegardedasstandard.Thevaluesgiveninparenthesesaremathematicalconversionstoinch-poundunitsthatareprovidedforinformationonlyandarenotconsideredstandard.1.3Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappropriatesafetyandhealthpracticesanddeterminetheapplicabilityofregulatorylimitationspriortouse.(Warningx2014;Freshhydrauliccementitiousmixturesarecausticandmaycausechemicalburnstoskinandtissueuponprolongedexposure.Theuseofgloves,protectiveclothing,andeyeprotectionisrecommended.Washcontactareawithcopiousamountsofwateraftercontact.Washeyesforaminimumof15min.Avoidexposureofthebodytoclothingsaturatedwiththeliquidphaseoftheunhardenedmaterial.Removecontaminatedclothingimmediatelyafterexposure.)1.4Thetextofthisstandardreferencesnotesandfootnoteswhichprovideexplanatorymaterial.Thesenotesandfootnotes(excludingthoseintablesandfigures)shallnotbeconsideredasrequirementsofthestandard.
【中国标准分类号】:Q11
【国际标准分类号】:91_100_10
【页数】:4P.;A4
【正文语种】:英语