Abstract
Compactionofsoilatengineeringconstructionsitesisessentialtoenhanceitsgeotechnicalproperties.LaboratoryStandardandModifiedcompactiontestshavebeenusedtodeterminecompactioncharacteristicsnamelyOptimumMoistureContentOMCandMaximumDryDensityMDD.However,thesetestsarerelativelytimeconsuming,requireconsiderableeffortsandlargesoilquantitiestoevaluatethesuitabilityofsoils usedindifferentengineeringworks.ThecurrentstudyaimstocorrelatesoilcompactioncharacteristicsandtheirAtterbergLimits(LiquidLLandPlasticLimitPL)forsoilsamplescollectedat1-1.25mdepthfromthecampussiteofUniversityofDiyala,BaqubahCity.SuchcorrelationsareadvantageoustopredictOMCandMDDneededtocontrolfieldcompactionspecifications.Grainsizeanalysis,specificgravity,LL,PL,standardProctorcompactiontestswerecarriedoutaccordingtoAmericanSocietyforTestingandMaterialsASTM Standards.Thelaboratoryresultsshowedthat,basedonUnified Soil Classification SystemUSCS,thesoilatthesiteisofCLtype(clayeysoiloflowplasticity).CompactiontestsrevealedthatOMCandMDDvalueswererangedfrom(15.8-18.4%)and(1.65-1.73)gm/cm3,respectively.MDDandOMCwerecorrelatedwiththeirLLandPL.ItwasfoundthatMDDcorrelatesverywellwithLLandPLwithhighR2equalsto0.8665and0.9189,respectively,andOMCcorrelateswithLLandPLwithlessR2equalsto0.4781and0.6882,respectively.Thepresentedmodelswerevalidatedusingthelaboratoryresults.CorrelationsestablishedinthisworkareusefulforthepreliminaryevaluationofsoilcompactionparametersusingAtterbergLimitsforfutureengineeringconstructionsinthestudyarea