Page 162 - 《水资源与水工程学报》2022年第2期
P. 162
!33 " ! 2 # & ' ( ) & * + , - Vol.33No.2
2022 $ 4 % JournalofWaterResources&WaterEngineering Apr.,2022
DOI:10.11705/j.issn.1672-643X.2022.02.21
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HIAJK:TV431 .5 LMNOP:A LQRK:1672643X(2022)02015807
Researchonadhesionbetweenmodifiedasphaltand
aggregatebasedonsurfaceenergytheory
1
1
2
LISheng,ZHANGYan,JIAOKai
(1.CollegeofCivilandArchitecturalEngineering,Xi’anUniversityofScienceandTechnology,Xi’an
710054,China;2.SinohydroBureau3rdCo.,Ltd.,Xi’an710016,China)
Abstract:Asphalt-aggregateadhesionisakeyinfluencingfactorforthewaterstabilityofasphaltmix
tures.Inordertoquantitativelyanalyzetheadhesionbetweenasphaltandaggregates ,surfacefreeenergy
theoryandimprovedboilingmethodwereusedfortheevaluation.First ,thesurfaceenergyparametersof
asphalt ,modifiedasphalt,agedasphalt,granite,limestoneanddiabaseweremeasuredat25℃ bycon
tactanglemeasurementtest ,andtheadhesionandexfoliationworkofdifferentasphalt-aggregatesys
temswerecalculated.Theabsoluteratio ERbetweentheworkofadhesionandtheworkofexfoliationwas
usedastheevaluationindexofadhesion ,andthequalitylossrateFobtainedbyimprovedboilingmethod
asthequantitativeindextoverifythetestresultsofthesurfaceenergytheory.Theresultsshowthatthe
surfaceenergyparametersof90Aasphaltmixedwithmodifiersreducedby2.5% to6.2%,thewatersta
bilityindex ERofthemodifiedasphalt-aggregatesystemincreasedby1.9% to7.8%,sotheadhesion
increased ,ofwhichtheexfoliationagentpresentedthebestimprovementeffect.However,theERvalue
ofagedasphaltdecreasedby4.3% to9.2%,resultinginthedecreaseoftheadhesion.Theadhesionof
systemswiththesameasphaltbutdifferentaggregateswererankedasfollows :asphalt-limestone>as
phalt-diabase>asphalt-granite;whereasthatofdifferentasphaltwiththesameaggregatewereranked
asfollows :90PA>90HC>90C ≈90H>90A.Theadhesiongradesobtainedbytheimprovedboiling
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