腐殖酸和鹽分濃度對石灰加固土有明影響以及微觀結(jié)構(gòu)研究畢業(yè)論文外文翻譯

1、InfluenceofhumicacidsaltconcentrationonlimestabilizedariakeclaysmicrostructureresearchAbstract:ThisstudyfirstinvestigatestheeffectsofhumicacidsaltconcentrationonlimestabilizedAriakeclayswithemphasisontheirmechanicalprope

2、rties.Theresultsshowthatthestrengthyieldstressoflimestabilizedclaywithhighhumicacidarelowduetotheobstructionofthepozzolanicreactiontheeffectofhumicacidonstrengthofstabilizedclaysdecreaseswithincreasingsaltconcentrationbe

3、causethehumicacidbecauseinactiveathighersaltconcentration.Thenthroughanalyzingthemicrostructurefeatureofthestabiliaedclayssomerelationshipbetweenmicrostructuremechanicalpropertiesoflimestabilizedclaysareestablished.Intro

4、duction:AriakeclayisahighlysensitivesoftclaydepositedaroundthecoastoftheAriakeBayinKyushuIslJapan.Itsnaturewatercontentvariesfrom50to200%.MostoftheAriakeclaysareclassifiedasCHthesensitivityexceeds16.Owingtoitsveryhighwat

5、ercontentlowshearstrengthimprovementofAriakeclayswithinashtperiodisnecessary.Apopularimprovementmethodistousechemicaladditivessuchaslime.Themajstrenghgainoflimestabilizedclaymainlyisderivedfromthreereactionsi.e.hydration

6、ionexchangepozzolanicreactionsinwhichcementingproductssuchasCSH(CaO－SiO2－H2O)CAH(CaO－Al2O3－H2O)arefmed.ganicmatterintheclayisresponsiblefhighplasticityhighshrinkagehighcompressibilitylowhydraulicconductivitylowshearstren

7、gth.Itisgenerallyacceptedthatthepresenceoftheganicmatterintheclaymayleadtothedetrimentofthestrengthoflimestabilizedclays.Howeversomestudieshaveshownthatnotalloftheganiccompoundsreallyhaveanegativeeffectonthecementingproc

8、ess.ThestudyfirstattemptstocomprehendtheeffectofhumicacidakindofganicmattersaltconcentrationonlimestabilizedAriakeclays.Thestrengththecompressibilityofthelimestabilizedclayswereinvestigatedbyunconfinedcompressiontestcons

9、olidationtests.Thesetestswereconductedonclayswithganicmatterextractedvariousamountsofhumicacidmixed.Saltconcentration0.715.423.1(Dichromateabsption)1.11.11.1Ignitionloss8.07.30Humuscontent%1.941.672.35Humuscontent%1.600.

10、250.31Fulvicacid%0.341.422.04ThesamplesfSEMMIPwerefreezingdriedtominimizethevolumechangeduetodrying.Fallingheadpermeabilitytestwasadoptedtoacquirethepermeabilityoflimestabilizedsampleswhichwasconductedduringconsolidation

11、test.Indertoinvestigationtheeffectofganicmattertheclayspecimensweretreatdbythealkalineextractionmethodtoeliminatetheganicmatter.Extractedclayi.e.theclayextractedoffganicmatterbythealkalineextractionmethodwasusedtoduplica

12、tespecimensftheunconfinedcompressiontestsusingthemixtureofclayhumicacidthatwasextractedfromClay120%lime.Astosaltconcentrationtheextractedclayswerewashedtoobtaintheclaysamplescontainingdifferentsaltcontentsbythedistilledw

13、ater.Conclusion:(1)Thestrengththeyieldstressoflimestabilizedclaynmallyincreasewithcuringtimeadmixturecontents.Inthecaseoflimestabilizedclaycontaininghighhumicacidthestrengththeyieldstressareextremelylow.(2)Bothhumicacidt

14、hesaltconcentrationarethedominantfactsthataffectthelevelofthecementationbondthefabric.Thehumicacidisapredominantfactinfluencingthelevelofcementationbond.Itisfurtherindicatedthatthehigherthehumicacidcontentisthelowerthece

15、mentationbondisfound.ThedetrimentaleffectofhumicacidonstrengthoflimestabilizedAriakeclaysdirectlyrelatestothesaltconcentration.Withalowsaltconcentrationthecementationbondisdelicateduetothelargespacingamongaggregationthel

16、owchemicalreactionswhichareeasilyobstructedbyhumicacid.OntheotherhitsdetrimentaleffectisconsiderablylessinthecaseofhighsaltconcentrationAriakeclaybecauseofthedecreaseinthecementationbondbychemicalreactions.Thusahighlevel