ASTM C1608-2007 水凝水泥浆的化学收缩用标准试验方法

作者:标准资料网 时间:2024-05-12 09:36:31  浏览:8433   来源:标准资料网

【英文标准名称】:StandardTestMethodforChemicalShrinkageofHydraulicCementPaste
【原文标准名称】:水凝水泥浆的化学收缩用标准试验方法
【标准号】:ASTMC1608-2007
【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(US-ASTM)
【起草单位】:C01.31
【标准类型】:(TestMethod)
【标准水平】:()
【中文主题词】:水泥浆;水泥;化学的;石膏;水凝水泥;石灰;灰浆;浆糊;收缩;测试
【英文主题词】:chemicalshrinkage;hydration
【摘要】:Numerouspropertiesofcementitiousmaterialsarecontrolledbytheirinitialhydrationrate.Examplesincludeearly-agestrengthdevelopment,heatrelease,andcrackresistance.Onedirectandconvenientmeasureofthisinitialhydrationrateisprovidedbythemeasurementofthechemicalshrinkageofthecementpasteduringitshydration.Ascementhydrates,thehydrationproductsoccupylessvolumethantheinitialreactingmaterials(cementandwater).Duetothisvolumechange,ahydratingcementpastewillsorbwaterfromitsimmediatesurroundings,whenavailable.Atearlytimes,thissorptionisindirectproportiontotheamountofhydrationthathasoccurred.4ThismethodisbasedontheonedevelopedbyGeiker.5Theresultsarerelevanttounderstandingthehydrationbehaviorofcements.Thismethoddoesnotmeasurethebulkvolumechanges(autogenousshrinkage)associatedwithchemicalshrinkagenorthecrackingpotentialofconcretesproducedwiththeevaluatedcement.1.1Thistestmethodmeasurestheinternal(absolute)volumechangeofhydrauliccementpastethatresultsfromthehydrationofthecementitiousmaterials.Thisvolumechangeisknownaschemicalshrinkage.1.1.1ProcedureA,volumetricmethod.1.1.2ProcedureB,thedensitymethod.1.2ThevaluesstatedinSIunitsaretoberegardedasthestandard.Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappropriatesafetyandhealthpracticesanddeterminetheapplicabilityofregulatorylimitationspriortouse.(Warning-Freshhydrauliccementitiousmixturesarecausticandmaycausechemicalburnstoskinandtissueuponprolongedexposure.)
【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】: