Introduction Emulsify with water.pdf

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1、AsphaltEmulsions101IntroductionChrisLubbersTechnicalSalesandMarketingMgrKratonPolymers,LLC50THAnnualIdahoAsphaltConferenceMoscow,IDOctober28,2010WhyHeatAsphalt?SoItCanBe:AsphaltBinderProperties•PumpedandtransportedSemi‐SolidConsistency•Blendedwithandcoa

2、taggregateAsphaltisathermoplasticmaterial•Remainworkableduringthatsoftensasitisheatedand•Transport,laydown,andcompactionhardenswhencooled.OtherWaystoMakeAsphaltWorkable:•Addsolvents–cutbackasphaltLiquidEmulsifywithwaterTemperatureWhyUseAsphaltEmulsions?

3、AsphaltEmulsions–AHistory•Nopetroleumsolventrequiredtoliquefy•Firstdevelopedintheearly1900s•Littleornohydrocarbonemissions•Earlyuseinsprayapplications+dustpalliatives•Growthuserelativelyslow:•Inmostcases,usedwithnoadditionalheat•Theabilitytocoatdampaggr

4、egate•Limitedbythetypeofavailableemulsions•Canusecoldmaterialsatremotesites•Generallackofknowledge•Widevarietyofemulsiontypesavailabletoday•Steadyriseinvolumesincethe1970’sPreventivemaintenanceapps–ImprovedLCC!AsphaltEmulsionsinPavementPreservation(PP)P

5、avementLifeCycleTheory•Strategyofmanagingpavementconditionto:MaintenanceRehabilitation•Maximizepavementlifespanatminimalcost~$1.00/SY>$10.00/SY•Appliestoalltypesofroads70/60?•LowvolumelocalroadstoheavyinterstatesCondition•Achievedbycarefulplanningandsel

6、ection(PCI)Reconstruction•Rightprotectivetreatment(application)>$$$$•Attheoptimal(right)timeTimeEmulsionChemistry•Emulsionsaremixturesof•Twoormorematerials•NormallydonotmixorblendtogetherEmulsionChemistry•Createdviamechanical+chemicalprocesses•Somecommo

7、nexamples•Mayonnaise,latexpaint,icecreamAsphaltEmulsions ‐CompositionBasicEmulsionIngredients–Asphalt•Threebasicingredients•Asphalt•Asphaltcementisbasicingredient•Water+MechanicalMixing•Upto50‐75%offinishedemulsion•Emulsifyingagent•Hardnessofbaseasphalt

8、cementvaries•Emulsionbaserangesfrom40–250dmmPEN•Maycontainotheradditives•Noexactcorrelationbwn.asphaltprops.and•Polymersemulsification•Stabilizers•Climatemayrequireharderorsofterbase•Coatingimprovers•Compatibilityofemulsifierneed