EXECUTIVE_SUMMARY_PTI_-_FOR_FIBERMAT_TYPE_B_Final_web.pdf

《EXECUTIVE_SUMMARY_PTI_-_FOR_FIBERMAT_TYPE_B_Final_web.pdf》由会员上传分享，免费在线阅读，更多相关内容在学术论文-天天文库。

1、Thompson7-11-2007Page1of7EVALUATIONSTUDYOFFIBERMAT®TYPEBINTERLAYERSYSTEMFORROADWAYPAVEMENTREHABILITATIONOriginalreportpreparedbyGhassanR.Chehab,Ph.D.AssistantProfessor&CarlosJ.PalaciosGraduateResearchAssistantPennsylvaniaTransportationInstituteThePennsylvaniaStateUniversityThompson7-11-2007Page2

2、of7Background:ThemajorityofpavementsnowadaysintheU.S.arecomposedofasphaltconcrete(AC)andPortlandcementconcrete(PCC).Inthelatterperiodsoftheirdesignservicelife,bothtypesofpavementsexhibitcrackingdistresses:fatigueandthermalcrackinginACpavements;faultingandmid-slabcrackinginthecaseofPCCpavements.I

3、nterlayers,suchasFiberMatTypeB®,withhighshearandtensilestrengthinadditiontohighductilitycanactasacrack-inhibitorlayerwhenplacedbetweentheoldsurfaceandthenewoverlay.Becauseoftheirstrength,thecrackpropagationthroughsuchaninterlayerwouldrequirehighenergyandstressconcentrations,ultimatelyleadingtoad

4、elayintheformationofreflectivecracks.ThestudyconductedconcentratedontheevaluationofFiberMat®TypeBinterlayer,apatentedtechniquedevelopedbyMidlandAsphaltMaterials,Inc,asasuperiorperformingStressAbsorbingMembraneInterlayer(SAMI)andalsousedwithinthegamutofpavementpreservationtechniquestomaintainaroa

5、dasanenhancedsurfacetreatmentalthoughthisisaspectisnotcoveredinthisreport.TheFiberMat®TypeBreinforcingtreatmentwhenusedasaSAMI,wheretwolayersofpolymermodifiedasphaltemulsionaresprayappliedandglassfiberiscutin-placesandwichedbetweenthetwoemulsionlayers.Overtheemulsion-fiber-emulsionmembrane,aggre

6、gateofnominally¼”sizeaggregateisspreadthencompacted.Thompson7-11-2007Page3of7Thompson7-11-2007Page4of7StudyApproach:Thestudyinvolvedthecomparisonofatypical1.5”HMAoverlay,withandwithouttheinclusionofaFiberMat®TypeBinterlayer,ontestsectionsonPennsylvaniaTransportationInstitute’sTestTrackinaddition

7、tolaboratorytestingoftheconstituentmaterialsoftheinterlayer.TheevaluationprocessofFiberMat®TypeBconsistedofthefollowingtasks:1.Literaturereview;2.BendingBeamRheometertestontheemulsionwithandwithoutfibers;3.Comparativeevaluat