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1、CHAPTER6Soil–Water–ChemicalInteractions6.1INTRODUCTIONUnbalancedforcefieldsattheinterfacesbetweensoilandwatercauseinteractionsbetweensmallsoilSaturatedsoilsatvoidratiosgreaterthan1.0containparticles,dissolvedions,andwater.Iftwoparticlesaremorewatervolumet
2、hansolidvolume,andvoidratiosincloseproximity,theirrespectiveforcefieldsoverlapgreaterthan1.0aremoretherulethantheexceptionandinfluencethebehaviorofthesystem,especiallyinfine-grainedsoils.Yet,theemphasisinthestudyofwhenthemagnitudesoftheseforcesarelargerelat
3、ivesoilcompositionandpropertieshastraditionallybeentotheweightsoftheparticlesthemselves.Clayparti-almostentirelyonthemineralogyandstructureofthecles,becauseoftheirverysmallsize,uniquecrystalsolidphase,withverylittleregardforthepropertiesstructure,andplat
4、yshapes,haveverylargespecificoftheliquidphase.Perhapsthisisbecause:surfaceareasandareespeciallyinfluencedbytheseforces.1.Classicalsoilmechanicsisfoundedonthecon-Severaltypesofinterparticleattractiveandrepulsiveceptofeffectivestress,whichpostulatesthatforce
5、sdeterminetheflocculation–deflocculationbe-volumechangeandstrengthbehaviordependonhaviorofclaysinsuspensionandthevolumechangethestressescarriedbythesolidgrainstructureandstrengthpropertiesofsoilsatvoidratioscommonandthewaterphaseisneutral.innaturaldeposits
6、.Thefabricatthetimeofformation2.Weallknowthatwaterisaclear,colorless,odor-mayhaveaprofoundinfluenceontheengineeringless,tastelessliquidthathasadensityverynearlypropertiesofasoildeposit,soanunderstandingofequaltounity.Itfreezesatatemperatureof0C,factorsin
7、fluencingflocculation–deflocculationbehav-boilsatatemperatureof100C,andithasquiteiorisofconsiderablevalue.Furthermore,postdeposi-well-definedviscosityandthermalproperties.Wetionalorpostconstructionchangesinsoilstructureandviewitassuchafamiliarliquidthatitis
8、scarcelyengineeringpropertiesmayresultfromchangesingivenasecondthought.physicochemicalforcesofinteraction.Principlesofsurface,colloidal,andsoilchemistryInreality,however,thesituationisnotsosimpleprovideunderstandingofmanyo
