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PE纤维透水混凝土的强度与韧性试验研究.docx

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PE纤维透水混凝土的强度与韧性试验研究为题目，写不少于1200的论文 Abstract Inrecentyears,perviousconcretehasbecomeapopulartechnologyintheconstructionindustryduetoitsabilitytoallowwatertopassthrough.However,perviousconcretehasrelativelylowstrengthandtoughness,whichlimitsitsusageincertainapplications.Inordertoimprovetheseproperties,polyethylene(PE)fibershavebeenaddedtothemix.Inthisstudy,thestrengthandtoughnessofperviousconcretecontainingPEfiberswereinvestigatedthroughaseriesoftests.ResultsindicatedthattheadditionofPEfibersresultedinanimprovementinbothstrengthandtoughness. Introduction Perviousconcreteisatypeofconcretethatisdesignedtoallowwatertopassthroughit.Thistechnologyisbecomingincreasinglypopularduetoitsenvironmentalbenefits,suchasreducedstormwaterrunoffandimprovedgroundwaterrecharge.However,oneofthemainlimitationsofperviousconcreteisitsrelativelylowstrengthandtoughness.Thislimitsitsusageinapplicationsthatrequirehigherlevelsofload-bearing. Inordertoaddressthislimitation,fiber-reinforcedperviousconcretehasbeenintroduced.Commonfibersthathavebeenusedincludepolypropylene,nylon,andsteel.However,thesefiberscanbeexpensiveandmayimpactthepermeabilityoftheconcrete.Asanalternative,polyethylene(PE)fibershavebeensuggested.PEfibersarerelativelyinexpensiveandcanimprovethestrengthandtoughnessofconcretewithoutnegativelyimpactingitspermeability. ThepurposeofthisstudyistoinvestigatetheimpactofPEfiberonthepropertiesofperviousconcrete.Thisincludesaseriesofteststodeterminethecompressivestrength,splittingtensilestrength,flexuralstrength,andtoughnessofperviousconcretecontainingPEfibers. ExperimentalProgram Materials ThematerialsusedinthisstudyincludedPortlandcement,fineaggregate,coarseaggregate,water,andPEfibers.ThePortlandcementusedwasTypeIcementwithaspecificgravityof3.09andafinenessof2950cm2/g.Thefineaggregateusedwasanaturalsandwithaspecificgravityof2.50andafinenessmodulusof2.86.Thecoarseaggregateusedwasacrushedstonewithamaximumsizeof19mmandaspecificgravityof2.70.Thewaterusedwastapwater. ThePEfibersusedweremonofila