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1、西安建筑科技大学硕士论文关键词：矿物掺合料；C80管桩混凝土；正交试验；力学性能；应力-应变曲线万方数据西安建筑科技大学硕士论文TheStudyonTheMechanicalPerformanceOfPipePileC80ConcreteSpecialty：ScienceofMaterialsName：ZhangXianzheInstructor：ProfessorHeTingshuABSTRACTPrestressedhigh-strengthconcretepipepileasasuperi
2、orperformanceundergroundpilefoundationmaterialhasbecomeoneofmostimportantfoundationconstructionmaterial.Theyarewidelyusedinallsortsofengineeringproject,includingindustryandcivilbuildings,bridgesandsoon.Inordertomanufacturehighqualityofhigh-strengthpi
3、pepileconcrete,generallyrequiredtheuseofmineraladmixtures,suchasquartzpowder,slagpowder,flyashandsoon.Butsofar,systemcomparativestudyofvariousmineraladmixturesaffectedonthemechanicalbehaviorofconcretepipepilewasrelativelyless.Thispaperstudiesthediffe
4、rentadmixturesonthemechanicalbehaviorofhigh-strengthconcretepipepile,andanalyzeddifferentadmixturespipepileconcreteunderuniaxialcompressionconditionstress-straincurve.Themainconclusionsofthispapershowedasfollows:(1)Throughtheorthogonalexperimentdesig
5、nandpipepileproductionpractice,wefoundthemainfactorsaffectingthestrengthofconcretepipepile:theamountof3coarseaggregate>fineaggregate>cement,theoptimaldosageofcementis480kg/m,33fineaggregate630kg/m,coarseaggregate1380kg/m.(2)Onthebasisofoptimizingmixp
6、roportion,usequartzsand,slag,flyash(10%~40%replaceamount)showedthatthehighestconcretestrengthwith20%quartz,40%slag,10%flyash.(3)Usequartzsand,slag,flyashdoublemixing(1:1、2:1、1:2;30%replacecement)showedquartzsandandslag(1:2),slagandflyash(1:1),quartzs
7、andandflyash(2:1)wasthebestdosage.万方数据西安建筑科技大学硕士论文(4)Mineraladmixturescouldenhancethesplittingtensilestrengthofthepipepileconcretewithdifferentlevels.Butafterdoublemixingtheincreasingofsplittingtensilestrengthwasnotobvious.(5)Fromdifferentmineraladmi
8、xturepipepileconcretestress-straincurve,pipepileconcreterisingperiodforlineargrowth,itvaryingdegreesofbrittlefractureafterthepeak.Keywords：Mineraladmixtures;C80high-strengthconcretepipepile;Orthogonaltest;Mechanicalproperty;stress-straincurve万方数据西安建筑
