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ID:37772418
大小:38.50 KB
页数:7页
时间:2019-05-30
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1、WarmMixAsphaltTechnologiesandResearchEuropeancountriesareusingtechnologiesthatappeartoallowareductioninthetemperaturesatwhichasphaltmixesareproducedandplaced.ThesetechnologieshavebeenlabeledWarmMixAsphalt(WMA).TheimmediatebenefittoproducingWMAisthereduc
2、tioninenergyconsumptionrequiredbyburningfuelstoheattraditionalhotmixasphalt(HMA)totemperaturesinexcessof300°Fattheproductionplant.ThesehighproductiontemperaturesareneededtoallowtheasphaltbindertobecomeviscousenoughtocompletelycoattheaggregateintheHMA,ha
3、vegoodworkabilityduringlayingandcompaction,anddurabilityduringtrafficexposure.Withthedecreasedproductiontemperaturecomestheadditionalbenefitofreducedemissionsfromburningfuels,fumes,andodorsgeneratedattheplantandthepavingsite.Therearethreetechnologiestha
4、thavebeendevelopedandusedinEuropeancountriestoproduceWMA:1.TheadditionofasyntheticzeolitecalledAspha-Min®duringmixingattheplanttocreateafoamingeffectinthebinder.2.Atwo-componentbindersystemcalledWAM-Foam®(WarmAsphaltMixFoam),whichintroducesasoftbinderan
5、dhardfoamedbinderatdifferentstagesduringplantproduction.3.TheuseoforganicadditivessuchasSasobit®,aFischer-TropschparaffinwaxandAsphaltanB®,alowmolecularweightesterifiedwax.TheAspha-MinandSasobitproductshavebeenusedintheUnitedStates.Additionaltechnologie
6、shavebeendevelopedandusedintheUnitedStatestoproduceWMA:4.PlantproductionwithanasphaltemulsionproductcalledEvotherm™,whichusesachemicaladditivetechnologyanda"dispersedasphalttechnology"deliverysystem.5.TheadditionofasyntheticzeolitecalledAdvera®WMAduring
7、mixingattheplanttocreateafoamingeffectinthebinder.AllfivetechnologiesappeartoallowtheproductionofWMAbyreducingtheviscosityoftheasphaltbinderatagiventemperature.Thisreducedviscosityallowstheaggregatetobefullycoatedatalowertemperaturethanwhatistraditional
8、lyrequiredinHMAproduction.However,someofthesetechnologiesrequiresignificantequipmentmodifications.Thistechnologycouldhaveasignificantimpactontransportationconstructionprojectsinandaroundnon-attainmentareassuchaslargemetropolitana
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