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火成岩纤维混凝土的抗冻性能试验研究 Title:ExperimentalStudyontheFrostResistanceofFiber-ReinforcedConcretewithIgneousRockAggregates Abstract: Thispaperpresentsanexperimentalstudyonthefrostresistanceoffiber-reinforcedconcrete(FRC)usingigneousrockaggregates.Frostdegradationisacommonprobleminconcretestructureslocatedincoldclimateregions.Byincorporatingfibersandigneousrockaggregatesintoconcrete,itisexpectedtoimproveitsresistancetofreeze-thawcyclesandenhanceitsdurability.Inthisstudy,varioustypesanddosagesoffiberswereaddedtothemix,andtheperformanceofFRCintermsoffrostresistancewasevaluatedthroughaseriesoffreezingandthawingtests.Theresultsindicatethattheadditionoffibersandtheuseofigneousrockaggregatessignificantlyenhancethefrostresistanceofconcrete. 1.Introduction 1.1Background 1.2SignificanceoftheStudy 1.3Objectives 2.LiteratureReview 2.1FrostDamageinConcrete 2.2Fiber-ReinforcedConcrete 2.3UseofIgneousRockAggregates 2.4PreviousResearchonFrostResistanceofFiber-ReinforcedConcrete 3.MaterialsandMethods 3.1Materials 3.1.1Cement 3.1.2Aggregates 3.1.3Fibers 3.1.4Water 3.2MixProportioning 3.3TestSpecimens 3.4ExperimentalProcedure 4.ResultsandDiscussion 4.1FreshConcreteProperties 4.2MechanicalProperties 4.3FrostResistanceTestResults 4.4AnalysisofResults 4.5ComparisonwithControlMix 5.Conclusion 5.1SummaryofFindings 5.2RecommendationsforFurtherResearch 1.Introduction 1.1Background Concretestructuresexposedtofreeze-thawcyclesaresusceptibletofrostdamage,whichcanresultincracking,spalling,andreducedservicelife.Theuseoffiber-reinforcedconcrete(FRC)hasbeenshowntoimprovethefrostresistanceofconcrete.Igneousrockaggregateshavealsobeenresearchedasapotentialreplacementforconventionalaggregatesduetotheiradvantageousproperties.Therefore,investigatingthefrostresistanceofFRCusingigneousrockaggregatesisofgreatimportancefordevelopingmoredurableconcreteforcoldclimateregions. 1.2SignificanceoftheStudy ThestudyaimstocontributetotheunderstandingofthefrostresistanceofFRCwithigneousrockaggregates.Theresultswillprovidevaluabl