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DSC modelling for predicting resilient modulus of crushed rock base as a road base material for Western Australia roads

, PP. 10-16

Keywords: pavementengineering,CRB,resilientmodulus,DSC,RI,triaxialtest

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Abstract:

Inordertoincreasetheappliedefficiencyofcrushedrockbase(CRB)inpavementstructuredesignforWesternAustraliaroads,thematerialmodellingbasedontheexperimentalresultswasinvestigated,andthedisturbedstateconcept(DSC)wasusedtopredicttheresilientmodulusofCRBbecauseofitssimplicityandstrongabilityincapturingtheelasticandinelasticresponsesofmaterialstoloads.TheactualdeformationofDSC,atanyloadingstate,wasdeterminedfromitsassumedrelativeintact(RI)state.TheDSCequationofCRBwasconstructedbyusingasetofexperimentalresultsofresilientmodulustests,andanidealizedmaterialmodel,namelythelinearelasticmodel,ofrelativeintact(RI)partwasconsidered.Analysisresultsrevealthattheresilientmodulus-appliedstressrelationshipsback-predictedbyusingtheDSCmodellingareconsistentwiththeexperimentalresults,so,theDSCequationissuitedforpredictingtheresilientmodulusofCRBspecimen.However,themodelandtheequationcomingfromthetestresultsareconductedinaccordancewiththeAustroadsstandard,sofurtherinvestigationandvalidationwithrespecttothefieldbehavioursofpavementstructureshouldbeperformed.7figs,11refs.

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