南水北調(diào)濟平干渠現(xiàn)澆混凝土配合比優(yōu)化及耐久性研究.pdf

1、山東大學碩士學位論文南水北調(diào)濟平干渠現(xiàn)澆混凝土配合比優(yōu)化及耐久性研究姓名：陳鳳振申請學位級別：碩士專業(yè)：水利工程指導教師：宋修廣瞿瀟20091012ABSTRACTInthispaperbasedontheonsitepouringofconcreteofSouthtoNorthwaterdiversionJi—Pingchannel，themixdesignandperformanceofHighPerformanceConcrete

2、werestudiedIntheexperiment，throughtheanalysisofp11ysicalandchemicalpropertiesofconcretematerials，theworkofpreferredrawmaterialswascompletedInordertomeetthedesignrequirementsofconcreteindicators”strengthgradeC30，impermeab

3、ilitygradeW8，antifreezelevelF200，suitableformechanizedliningoftheslump40mm～60mm”，gradeIflyashandhighperformanceadditives”double—doped”wereusedastheprimarytechnicalapproachtodesignthemixproportionsAftertheintroductionofhi

4、ghqualityflyashinconcrete，theworkabilityof缸shconcretethatitdoesnotdisintegrate，easypouring，reducingtheslumploss，reducebleedingandimprovethewipingversatilitywereimproved；Lowerheatofhydrationofcementandreducethethreattheof

5、concrete”thermalcracking”；Thecombinationofhigh—performanceadditive，Canreducethewatercementratioofconcrete，SOmatflyashfromtheearlyCanapprovethestrengthofconcreteRefinepores，improvingtheinterfacestructureandthedensityofcon

6、crete；Theuseofhigh—qualityflyashalsohasaroleininhibitingalkaliaggregatereaction；TheuseofhighperformanceadditivesalsoCanreducewaterconsumptiontoensurethatconcretecontaininggasandmeetthedesignrequirementsofantifreezedurabi

7、lityFlyashandadmixtureinhi班performanceconcretecansignificantlyreducetheheatofhydrationitwillhelpcontrolthetemperaturestressandreduceconcretecrackingCompared、ⅣithordinaryconcretethehydrationheatofHighperformanceconcretegr

8、eatlyreducedandthepeal【ofheathydrationappearsdelayed，italsohasexcellentcrackresistanceFlyashandadmixtureinhighperformanceconcreteCanimprovethehardeningofconcreteporestructure，poresizedistributionrationalityandcompactness

9、Therefore，itCangreatlyimprovethelatestrengthofconcrete，whileit謝thexcellentdurabilityAreasonablechoiceofflyashexpansiveandhighlyefficientairentrainingwaterreducingCanformulatedexcellentperformance，highperformanceshrinkage