ASTM C191-2008 用维卡针测定水硬性水泥凝固时间的标准试验方法,

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【英文标准名称】:StandardTestMethodsforTimeofSettingofHydraulicCementbyVicatNeedle
【原文标准名称】:用维卡针测定水硬性水泥凝固时间的标准试验方法,
【标准号】:ASTMC191-2008
【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】:automaticvicat;hydraulic-cementpaste;timeofsetting;vicat;vicatneedle;Hydrauliccementconcrete;Settingtime;Vicatneedle
【摘要】:ThistestmethodprovidesameansofdeterminingcompliancewithaspecificationlimitforVicattimeofsetting.Refertotheappropriatespecificationforthecementtodetermineifthistestmethodisusedforspecificationcompliance.Timeofsettingmeasuredbythismethodwillnotnecessarilyprovidethesameresultsasthetimeofsettingofhydrauliccementpastemeasuredbyothermethods,orthetimeofsettingofmortarorconcrete.1.1ThesetestmethodsdeterminethetimeofsettingofhydrauliccementbymeansoftheVicatneedle.Twotestmethodsaregiven;MethodAistheReferenceTestMethodusingthemanuallyoperatedstandardVicatapparatus,whileMethodBpermitstheuseofanautomaticVicatmachinethathas,inaccordancewiththequalificationrequirementsofthismethod,demonstratedacceptableperformance.1.2ThevaluesstatedinSIunitsaretoberegardedasstandard.Nootherunitsofmeasurementareincludedinthisstandard.1.3Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappropriatesafetyandhealthpracticesanddeterminetheapplicabilityofregulatorylimitationspriortouse.See1.4foraspecificwarningstatement.1.4Warningx2014;Freshhydrauliccementitiousmixturesarecausticandmaycausechemicalburnstoskinandtissueuponprolongedexposure.Theuseofgloves,protectiveclothing,andeyeprotectionisrecommended.Washcontactareawithcopiousamountsofwateraftercontact.Washeyesforaminimumof15min.Avoidexposureofthebodytoclothingsaturatedwiththeliquidphaseoftheunhardenedmaterial.Removecontaminatedclothingimmediatelyafterexposure.1.5Thetextofthisstandardreferencesnotesandfootnoteswhichprovideexplanatorymaterial.Thesenotesandfootnotes(excludingthoseintablesandfigures)shallnotbeconsideredasrequirementsofthestandard.Note18212;ForthemethodfordeterminingthetimeofsettingbyGillmoreneedles,seeTestMethodC266.
【中国标准分类号】:Q11
【国际标准分类号】:91_100_10
【页数】:8P.;A4
【正文语种】:英语