【英文标准名称】:StandardTestMethodforHotWaterAcceleratedAgingofGlass-FiberReinforcedCement-BasedComposites
【原文标准名称】:玻璃纤维增强的水泥基混合物的热水加速老化的标准试验方法
【标准号】:ASTMC1560-2003
【标准状态】:现行
【国别】:
【发布日期】:2003
【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】:C27.40
【标准类型】:(TestMethod)
【标准水平】:()
【中文主题词】:老化;纤维增强的;玻璃纤维增强的;纤维水泥;加速的;水泥;热水;玻璃纤维
【英文主题词】:acceleratedaging;GFRC;glassfiber;glassfiberreinforcedconcrete
【摘要】:Thebasisforthistestasanindicatorofthelongtermbehavioroffiberreinforcedcompositesisthatelevatedtemperatureandmoisturecontentacceleratetheformationoftheproductsofhydrationofthecementinthematrix,particularlycalciumhydroxide.3.1.1Itisknownthattheinteractionoftheseproductsofhydration,particularlycalciumhydroxide,withthefiberscanhaveamajoreffectonthelong-termpropertiesofthecomposites.3.1.2Theprincipalmechanismthatoccursisthatthecalciumhydroxideformswithinthebundlesoffilamentsthatformtheglassfiberstrand.Thisgraduallybondsthefilamentstogether,whichreducesfilamentpull-out.Thiscausesareductioninthestraincapacityofthecomposite,therebyreducingthestrengthofthecompositeandchangingthecompositefromaductilematerialtoanincreasinglybrittlematerial.3.1.3Acceleratingtheformationofthehydrationproductsacceleratestheirinteractionwiththefibers,henceacceleratingtheagingofthecomposite.Thedatadevelopedfromthistestareusedbyresearchersandmanufacturerstoevaluatethelong-termperformanceofdifferentmixtures,reinforcements,mixturecomponents,andtoprovidedataforthedevelopmentofdesignproceduresforproductsmadefromthesecomposites.3.2.1Therecordeddataalsoprovidesscreeninginformationasnewmatricesandreinforcementsaredeveloped.Theusefulnessofthetestasanindicatoroflongtermcompositeperformanceisvalidiftheonlyreactionsthatareacceleratedarethosethatoccurmoreslowlyundernaturalweathering,hotwatercaninduceeffectsinsomecomposites,forinstancethosecontainingacrylicpolymer,thatmaynotoccurinnaturalweathering.Thistestmethodmaynotbeavalidindicatoroflong-termperformanceofsuchcomposites.1.1Thistestmethodprovidesawayofacceleratingtheagingofglassfiberreinforcedcementitiouscompositesinordertodevelopdatathatwillindicatereal-lifenaturalweatheringperformance.1.2ThecouponspreparedforthistestmethodwillbetestedusingTestMethodC947.1.3Thistestmethodcanbeusedtoagecouponsforothertestmethods.1.4Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappropriatesafetyandhealthpracticesanddeterminetheapplicabilityofregulatorylimitationspriortouse.
【中国标准分类号】:Q13
【国际标准分类号】:91_100_30
【页数】:2P.;A4
【正文语种】: