Abstract:Throughtherelativepermeabilitytestonthetruncatedconespecimensofyellowriversuperfinesandplasticconcrete(YRSSPC)

effectsofinfluencingfactorsincludingthereplacementratesuperfinesand(R)

water cementratio(W/C)

thepercentageofclayinthecementitiousmaterial(c1)andthepercentageofcementinthecementitiousmaterial(c2)upontherelativepermeabilitycoefficientofYRSSPC(Kr)werestudied.Basedontheexperimentalresults

acomputationalmodelwasproposedtocalculateKrofYRSSPC.TheresultsshowedthatRhassignificanteffectonthegraincompositionoffineaggregate

andthenithaseffectonKr.Krtendstodecreaseas Rincreases.WhenRisover25%

thepermeabilityofYRSSPCischangedsignificantly

so25%isthecriticalpoint.ThebestRis50%.W/ChassignificanteffectonKr.Krincreaseswith the increase ofW/C.TheclaycontentandthecementcontenthaveeffectsonKr.Kr decreasesfirst

andthenincreaseswith the decrease of c1.Krdecreaseswith the increase of c2.