摘要：

Mineralillerractional voids valueaseensedsn indicatorfillertiffening effectincehe introductionfheestyigden in 1947.hebjectivefhistudy iso evaluatehe potentialfheigden voidsesto predictheastic viscosityor wideangefillersndinderssed in Northmerica. Inhistudy detailed literatureeview,onducteds partfhe NCHRP 9-45 projects, identifiedmalletfiller physicalndhemical propertieshatre expectedoaveheost important effectsnasticehavior.igdenractional voids,s wellshesether important physicalndhemical properties wereeasuredoretf 30illerselectedrom variousources inhenitedtates.he propertiesfheseillers werenalyzedndsedoelect 17illershatoverhe wideangef propertieseasuredorhe largeret.hese 17illers werelended with 4indersndesultingastics wereestedoeasurehe increase in viscosityelativeohenfilledinders.heesultshowedhatheigdenactional voids valuesould notesedouccessfully predicthetiffening effectfheillersince differentsphaltinders interact differently withheillers. Detailedtatisticalnalysislearlyhowedhatheastic viscosity isignificantly dependentnheillerndsphaltinderypes.henalysisfheesultshowshathese properties indditionoheir interactive effects withheinderype governhe viscosity increasefheastics.heesultslsoevealedhatneillerypes demonstrate extreme interaction withpecificypefinder.he predictionodel developedorheelative viscosityfastics wasbleolosely estimatehetiffening effectfheillers.heseesultsonfirm earliertudiesonducted in Europendesulted inheecent developmentf European Normsorillers.

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