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1、FieldCompactionEquipment andProceduresDr.TalatBaderObjectiveoffieldCompaction &ControlParametersTheobjectiveofcompactionistostabilizesoilsandimprovetheirengineeringbehaviorItisimportanttokeepinmindthedesiredengineeringpropertiesofthefill,dam,road,etc…Thedensit
2、yofthefillinadditiontothewatercontentshouldbeobserved.FromHoltzandKovacs,1981DesignProcedureforfieldCompactionDesignandSelectionofFillMaterialsSurveythelocalsoilsourcesthatcouldpossiblybeused.Obtainsoilsamplesfromeachsource(borrow),andperformthenecessarylabora
3、toryteststoclassifythesoilviaeitherAASHTO ortheUCSsystemstodefinethepropertiesrequiredfordesign.Theclassificationitselfwilloftentellwhetherornotagivensoilissuitableforanintendedapplication.Soilswithlargeshrinkageratios(SR)shouldbeavoided.Soilswithhighplasticit
4、yindices(PI)shouldbeavoided,sincetheyindicateatendencytoshrink/expand.Organicmatterwhichcandecayshouldgenerally beavoidedasfillmaterialunlessspecialprecautionsaretaken.DesignandSelectionofFillMaterials3)Oncea soilisfoundtobesuitable,foranintendedapplication,pe
5、rformthenecessarymoisture-densitystudy.4)Iflocalcodes/guidelinesarenotprovided,astudywouldbeneededtodeterminetheminimumrelativefieldcompactionofthesoil.Factorswouldbe:requiredshearstrengthofthesoilmaximumallowablesettlementsunderdesignloads.Aftertheearthstruct
6、ureisdesigned,Thecompactionspecificationsarewritten.Fieldcompactioncontroltestsarespecified,Andtheresultsofthesebecomethestandardforcontrollingtheproject.HowtosetyourSpecificationSpecificationsEnd-productspecificationsThisspecificationisusedformosthighwaysandb
7、uildingfoundation,aslongasthecontractorisabletoobtainthespecifiedrelativecompaction,howheobtainsitdoesn’tmatter,nordoestheequipmentheuses.Caretheresultsonly!MethodspecificationsThetypeandweightofroller,thenumberofpassesofthatroller,aswellastheliftthicknessares
8、pecified.Amaximumallowablesizeofmaterialmayalsobespecified.Itistypicallyusedforlargecompactionproject.FromHoltzandKovacs,1981ResultsFromLaboratoryTestStandard&Modified ProctorTestD
