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1、expansionrateinacidunderthesameconditionswiththedecreaseofthepHvalueincreases，shrinkingratioandvolumeshrinkingratiohavenoobviousregularity，underthesameconditionsofalkalinefreeexpansionrateincreaseswiththeincreaseofPHvalue,shrinkingratioandvolumeshrinkingratiohave
2、noobviousregularity.(5)Untreatedredclayiscomposedofunitcohesionofdifferentsizesparticlesstructure,smallunitsaroundthebigunit,fillingparticlesarrangedbetweenmoreclosely,thereisnocleardividingline,aftersoakingwaterbecomeporoussoilloose,loosebetweenparticles,porosit
3、yincreases,notclose,soakbeforeandaftersoakinginthesolutionfurthersofteningofsoil,soilparticlecementingcementationoffreeironoxideandthepartbetweenthesaltwasfurtherdamage,andtheinternalporewaswellversedin,furtherintensifythepore,losethecementationoffreeironoxideset
4、theincreaseofintergranularporenotonlydestroysthesoilstructuralstrength,alsoraisedthecompressibilityofsoil.(6)RedclayintheneutralsolutionofsodiumchlorideandcalciumchlorideaftersoakingthequalityofNaandCaiswithincreaseswiththeincreaseofsolutionconcentration,solution
5、concentrationandnegativelycorrelationwiththefreeironoxidecontentinthesoil,thequalityofNaandCarespectivelyincreasedby2timesand3times,thequalityoftheFewasreducedby7.6%and7.6%respectively;Insoilandwaterconservationeffectandacidoralkalienvironmentwillfurtherstrengthe
6、n,redclayitselfchangesoftheelementsembodiedinfurtherincreasesinthequalityofNaandCa,Feisreduced,thequalityofthesoilandinthesamesituationofacidenvironmentfortheelementisgreaterthantheeffectofsoakinginalkalineenvironmentsoilsamples.Keyword：remoldingredclay；soil-wate
7、rinteraction；pHysical-mechanicalproperty；microstructureIII万方数据目录摘要.................................................................................................................................................IAbstract...........................................
8、..................................................................................................II第一章绪论......................................................
