canallowtheproductionofcheaperprototypes,andmediumlowvolumedies.Remarkableinterestisalsoemergingintheplasticsindustryfortheproductionofdies,whoserequirementscouldbeeasilymetbyadequatelyadjustingthemixturecompositionandproportioning.ThisworkwasaimedtostudysoftcastUHPFRCs,inparticulartheirmechanicalperformance,theirthermalconductivity,inordertopredictUHPFRCcapacityforheatloss,aswellastheiradaptabilinceconcrete(OPC),ofaHighPerformanceConcrete(HPC)andofanUltraHighPerformanceFiberReinforcedConcrete(UHPFRC)areshownforcomparisoninFig.[].InmostindustrialcountriesHPCmaterialsarecurrentlyemployedininfrastructuralengineeringworkswhereheavystaticanddynamicstressesorsevereenvironmentalaggressionhavetobecounteracted,suchasinseaplatformsforoilextraction,longspanbridges,underseatunnels,andskyscrapersinseismicareas.However,UHPFRCmaterialsshow,althoughinanexperimentalphasewithsomefieldtests,muchhigherperformancethanHPC.Particularly,besidesextraordinarycompressiveandflexuralstrength(seeFig.),veryhighductilityaswellastoughnessandfractureenergy[–]encouragesnewapplicationsforthesematerials,competingwithinnovativeceramicsandstructuralmetalsinthefieldofmechanicalandenvironmentalengineering,aswellascivilandbuildingengineering[].ThefollowingapplicationsarepromisinginrelationtoUHPFRCmaterialsutilization[].Inenvironmentalandchemicalengineering,highlyreliablecontainerscanbeadvantageouslyproducedtostorehazardous(toxic,inflammable,etc.)fluidsorsolids,sincetheuseofUHPFRCmaterials,inwhichnegligiblediffusionofionicandmolecularspeciesoccurs,canallowtomakeinsignificantthereleaseoftoxicorradioactivewastesfromthecontainertotheenvironment.Incivilengineering,constructionofextraordinarybuildings,whosesizesorlocationrequireveryhighperformanceintermsofbothmechanicalstrengthandductilityaswellastoughness,mayberealizedwithUHPFRCmaterials.Asamatteroffact,inTokyo,owingtoalackofavailableareas,plansofbuildingsashighasmarebeingreliablystudied.Inmechanicalengineering,highimpact-resistantproducts,againstburstorshot,orhighabrasion-resistantdiesinthemoldingprocessofmetalproducts,suchassteelsheets,canbesuccessfullydeveloped.Actualdiesarecharacterizedbyveryhighunitcostwhich,fortheireconomicamortisation,needhighvolumeproductionlines.Thisfact,forinstance,preventssupplyflexibilityinrelationtocoachworkchangesinthecarindustry.TheuseofUHPFRCmaterials,dependingonthestrengthlevelrequirements,canallowtheproductionofcheaperprototypes,andmediumlowvolumedies.Remarkableinterestisalsoemergingintheplasticsindustryfortheproductionofdies,whoserequirementscouldbeeasilymetbyadequatelyadjustingthemixturecompositionandproportioning.ThisworkwasaimedtostudysoftcastUHPFRCs,inparticulartheirmechanicalperformance,theirthermalconductivity,inordertopredictUHPFRCcapacityforheatloss,aswellastheiradaptabili增加,自从不锈钢具有极高热导率对混凝土、众所周知。实验结果UHPFRC被发表在桌子上、在比较与导热系数钢制与普通混凝土。无显著影响。钢纤维明显,然而,UHPFRC很低孔隙率和尊敬普通混凝土显示某个效果(+)对热导系数结论UHPFRC具有最佳和易性和机械演出时取得最新类型acrylicbased增塑剂(贴上“spB”)和水灰比影响.是被采用。特别是,-day抗压强度帕,抗弯强度MPa相切弹性模量约GPa了从HPFRC获得。从一个机器和易性观点,损坏持续通过UHPFRC钻时可以看到减少,尤为突出从分层。这个信息是重要潜在为应用领域如机械工程,在哪里UHPFRC材料可采用高耐磨死在成型工艺。References[]RichardP,CheyrezyMH.活性粉末混凝土高韧性和-MPa抗压强度[M].In:MethaPKeditor.ConcreteTechnology.Past,Present,andFuture.S.Francisco,USAAmericanConcreteInstitute,ACISP-,.p.–.[]YunshengZ,WeiS,SifengL,ChujieJ,JianzhongL.准备C绿色活性粉末混凝土及其载荷行为[M].CemConcrCompos,():–.[]YaziciH,YardimciMY,Yig˘iterH,AydinS,TurkelS.活性粉末混凝土力学性能,含有高量地面粒状炉渣[M].CemConcrCompos,():–.[]YaziciH,YardimciMY,AydinS,KarabulutAS_.活性粉末混凝土力学性能含有矿物掺合料焙烘政权[M].ConstrBuildMater,():–.[]GarasVY,KahnLF,KurtisKE.短期拉伸收缩徐变超高高性能混凝土[M].CemConcrCompos,():–.[]IpekM,YilmazK,SumerM,SaribiyikM.预留效果应用到机械行为压力活性粉末混凝土在设置阶段[M].ConstrBuildMater,():–.[]CollepardiM,CorinaldesiV,MonosiS,MoriconiG.DSPmaterialsapplicationsanddevelopmentprogress.In:CernyM,editor.复合材料在材料和结构工程[M],.p.–.[]CollepardiM,CorinaldesiV,MonosiS,MoriconiG.ApplicazioniesviluppodeimaterialiDSP.L’IndustriaItalianadelCemento,:–.[]YangSL,MillardSG,SoutsosMN,BarnettSJ,LeTT.聚合和固化影响政权力学性能超高性能离心机混凝土(UHPFRC)[M].ConstrBuildMater,():–.[]YaziciH,Yig˘iterH,KarabulutAS_,BaradanB.利用粉煤灰和地面粒状炉渣作为替代硅源在活性粉末混凝土[M].Fuel,():–.[]VanTuanN,YeG,vanBreugelK,FraaijALA,DaiBuiD.该研究利用稻壳灰产生超高性能混凝土[M].ConstrBuildMater,():–.[]EN-/,Cement–part:composition,specificationsandconformitycriteriaforcommoncements;.[]EN-,砂浆测试法[M].Determinationofconsistenceoffreshmortar(byflowtable);.[]RossiP.开发新水泥复合材料在施工[M].In:DhirRK,HewlettPC,CsetenyiLJ,editors.Innovationanddevelopmentsinconcretematerialsandconstruction.London,UK:ThomasTelfordPublishing;.p.–.[]EN-,开发新水泥复合材料在施工[M].Determinationofflexuralandcompressivestrengthofhardenedmortar,.[]JahanmirS,RamuluM,KoshyP.制陶和复合材料加工[M].NewYork:MarcelDekker,.[]UNI.Materialiisolanti.Determinazionedellaconduttivitatermicaconilmetododellapiastracaldaconanellodiguardia,.nceconcrete(OPC),ofaHighPerformanceConcrete(HPC)andofanUltraHighPerformanceFiberReinforcedConcrete(UHPFRC)areshownforcomparisoninFig.[].InmostindustrialcountriesHPCmaterialsarecurrentlyemployedininfrastructuralengineeringworkswhereheavystaticanddynamicstressesorsevereenvironmentalaggressionhavetobecounteracted,suchasinseaplatformsforoilextraction,longspanbridges,underseatunnels,andskyscrapersinsei外文原文二MechanicalandthermalevaluationofUltraHighPerformanceFiberReinforcedConcretesforengineeringapplicationsValeriaCorinaldesi⇑,GiacomoMoriconiDepartmentofMaterialsandEnvironmentEngineeringandPhysics,UniversitPolitecnicadelleMarche,ViaBrecceBianche,Ancona,ItalyAbstract:UltraHighPerformanceFiberReinforcedConcrete(UHPFRC)isacement-basedmaterial,whichbehaveslikealow-porosityceramicmaterialwithexcellentmechanicalperformance.Thisworkwasaimedtostudysoftcast(flowableatcastingtime)UHPFRCsand,inparticular,thetimedevelopmentofcompressivestrength,flexuralstrengthandelasticmoduluswasmonitoredforUHPFRCpreparedbyvaryingthewatertocementratiofrom.to..Silicafume,steelfibersandacrylic-basedsuperplasticizerwereemployedtopreparetheUHPFRCmixtures.Optimumworkabilityandmechanicalperformancewereobtainedwithawatertocementratioof..ThermalconductivitywasdeterminedforthesameUHPFRC,inthepresenceandintheabsenceofsteelfibers.Thescopewastoevaluatetheeffectofsteelfibersonthethermalconductivitycoefficient,inordertopredicttheUHPFRCcapacityforheatloss.Thisinformationaswellasitsdrillingcharacteristics,inordertotestitssuitabilitytobemachined,couldbeessentialforpossiblefieldsofapplicationsuchasinmechanicalengineering,whereUHPFRCmaterialscanbeemployedashighabrasion-resistantdiesinthemoldingprocessofmetalandpolymerproducts.Keywords:Machineworkability;Mechanicalperformance;UHPFRCSilicafume;Thermalconductivity.IntroductionUltraHighPerformanceFiberReinforcedConcreteisaspecialcement-basedmaterialwhichbehaveslikealow-porosityceramicmaterialwithexcellentmechanicalperformance.Inparticular,itisasuperplasticizedsilicafumeconcrete,oftenreinforcedwithfibers,withimprovedhomogeneitybecausetraditionalaggregatesarereplacedwithveryfinesanduptolm[].AccordingtoRichardandCheyrezy[],ifsoftcastandcuredatroomtemperature,itscompressivestrengthcanachieveMPa.Infact,UHPFRCrepresentsthehighestdevelopmentofHighPerformanceConcrete(HPC)anditsultimatecompressivestrengthdependsonthecuringconditions(eitherstandardcuringorsteamcuringorautoclavecuring[,]),onpossiblethermaltreatments[,]aswellasonthemanufacturingtechniqueadopted,anditsvaluecouldriseuptoMPainthecaseofcompressivemolding[].JusttogiveanideaoftheexcellentmechanicalperformanceofUHPFRC,thestress–straincurvesofanordinaryperformanceconcrete(OPC),ofaHighPerformanceConcrete(HPC)andofanUltraHighPerformanceFiberReinforcedConcrete(UHPFRC)areshownforcomparisoninFig.[].InmostindustrialcountriesHPCmaterialsarecurrentlyemployedininfrastructuralengineeringworkswhereheavystaticanddynamicstressesorsevereenvironmentalaggressionhavetobecounteracted,suchasinseaplatformsforoilextraction,longspanbridges,underseatunnels,andskyscrapersinseismicareas.However,UHPFRCmaterialsshow,althoughinanexperimentalphasewithsomefieldtests,muchhigherperformancethanHPC.Particularly,besidesextraordinarycompressiveandflexuralstrength(seeFig.),veryhighductilityaswellastoughnessandfractureenergy[–]encouragesnewapplicationsforthesematerials,competingwithinnovativeceramicsandstructuralmetalsinthefieldofmechanicalandenvironmentalengineering,aswellascivilandbuildingengineering[].ThefollowingapplicationsarepromisinginrelationtoUHPFRCmaterialsutilization[].Inenvironmentalandchemicalengineering,highlyreliablecontainerscanbeadvantageouslyproducedtostorehazardous(toxic,inflammable,etc.)fluidsorsolids,sincetheuseofUHPFRCmaterials,inwhichnegligiblediffusionofionicandmolecularspeciesoccurs,canallowtomakeinsignificantthereleaseoftoxicorradioactivewastesfromthecontainertotheenvironment.Incivilengineering,constructionofextraordinarybuildings,whosesizesorlocationrequireveryhighperformanceintermsofbothmechanicalstrengthandductilityaswellastoughness,mayberealizedwithUHPFRCmaterials.Asamatteroffact,inTokyo,owingtoalackofavailableareas,plansofbuildingsashighasmarebeingreliablystudied.Inmechanicalengineering,highimpact-resistantproducts,againstburstorshot,orhighabrasion-resistan 外文原文二MechanicalandthermalevaluationofUltraHighPerformanceFiberReinforcedConcretesforengineeringapplicationsValeriaCorinaldesi⇑,GiacomoMoriconiDepartmentofMaterialsandEnvironmentEngineeringandPhysics,UniversitàPolitecnicadelleMarche,ViaBrecceBianche,60131Ancona,ItalyAbstract:UltraHighPerformanceFiberReinforcedConcrete(UHPFRC)isacement-basedmateri