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1、AbstractThisthesisstudiestheinfluenceofgradingeffectsofmineralparticles,andtheoreticallyanalyzestheimprovementswhichthefinemineralpowdercouldgivetothedualityortri-variatesystems.Itistriedtosummarizetherelationshipbetweenthedensepackingpropertyandsofactors,suchaspercentage,finenes
2、sortheparticlesizedistributionofthosemineralpowders.Then,throughsomeexperiments,theinfluencesofthefinemineralpowdersonthefluidity,rheologicalandhardenedpropertiesandthehydrationarcstudied・Thetestsofstandardusingwaterratiocanreflecttheexistenceofthedensepackingphenomenondirectly,F
3、irst,calculatedtheParticlc-Sizc-Distributionofmulti-powdersbasedthedensepackedAndreasenequation,then,calculatedthepackingdensitybasedAimandGoffmodel.Baseduponthoseobservationsanddatafromliteratures,wechoosetwodifferentsystemstolucubrate,contemporary,weaddedsomecorrelationsystems.
4、Experimentalstudiesarecarriedoutontherheologicalpropertiesoffreshpastesaswellasthestrengthofhardenpaste,validatedthedensepackingdensitythroughwaterrequirementratioofnormalconsistency,theresultindicatedwaterrequirementratioofnormalconsistencycanbeavaluetotextthepackingdensity.Fina
5、lly,wediscussedthehydrationprocessofParticle-Size-Distributioncement.Thestudieshaveshownthat:TheAimandGoffmodelcangetthepackingdensityofmineralpowder-cementsystemconveniently;thedistributionofcementandmineralpowderhasimportanteffectonpackingdensityofmixtures,thebetterdistribution
6、,thehigherpackingdensity;particledistributioniscloselyrelevanttofluiditycharacteristicsoffreshpastes,underidenticalcondition,theyieldingshearstressandplasticviscosityreducewithincreasinglybetterparticledistributionandthushigherpackingdensityofmixture;particledistributionisalsoclo
7、selyrelevanttothestrengthofhardenedpastessinceforbetterparticledistribution,thepackingstructureofParticlc-Sizc-Distributioncementismoreclose,whichcanimprovenotonlythestrengthbutalsotheresistancechloridediffusion;theeffectofParticle-Size-DistributioncementalsocanfindfromKeywordsPa
8、rticle-Size-Distribution(P-S-D)cement;mi
