The Unsaturated Shear Strength and Swelling Charac Teristics of Expansive Soils of Arbaminch

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dc.contributor.advisorSeged, Hadush (PhD)
dc.contributor.authoruba, Bantayehu
dc.date.accessioned2018-06-20T08:16:10Z
dc.date.accessioned2023-11-11T12:51:24Z
dc.date.available2018-06-20T08:16:10Z
dc.date.available2023-11-11T12:51:24Z
dc.date.issued2011-06
dc.description.abstractInEthiopia,somanyresearchesweredoneoncharacterizingexpansivesoilsofseveraltownsbutonlyasinglestudy,doneonAddisAbabaexpansivesoil,existsontheunsaturatedshearstrengthbehaviorofexpansivesoils.ThepresentstudyaddressesexaminingtheexpansivesoilsinArbaMinch–atownwithagreatportionofitsterraincoveredbythesamesoilbutnotconsideredinpreviousstudies.Alaboratory-testingprogramwasplannedandcarriedoutonundisturbedsoilsamplestakenfrom10differentlocationsinthetownforswellingpressuretesting;andamongthese,onepitwasallottedforunsaturatedshearstrengthstudy. Thelaboratorytestresultsrevealedthattheswellingpressurerangesfrom74.53to571.29kPa,SpecificGravityfrom2.63to2.80,PlasticityIndexfrom49to77%,ShrinkageIndexfrom81to117%andFreeSwellfrom94.0to165.0%.Themeasuredswellingpressuresandthegeotechnicalparametersdeterminedfromidentificationtestsareusedtoassessthevalidityofalreadydevelopedexpressionsbyvariousresearcherstothesiteunderstudyandnewmodels,thatrelateswellingpressurewithindexandphysicalproperties,aredevelopedusingSPSS16.0forwindowssoftware. Theresultsfromunsaturatedshearstrengthtestsperformedwitha50kNmodifieddoublewalltriaxialmachineonanundisturbedsamplesettingmatricsuctiontobe100kPa,150kPaand200kPaforaneffectiveconsolidationpressureof200kPahaveclearlyindicatedthesaturatedcasetoyieldsmallershearstrengththantheunsaturatedone.Themaximumdeviatorstressshowedtoincreasefrom107.61kPato174.35kPawithanincreaseinmatricsuctionbuttheshapeofthestress-straindiagramremainedidentical.en_US
dc.description.sponsorshipAddis Ababa Universityen_US
dc.identifier.urihttp://etd.aau.edu.et/handle/12345678/2138
dc.language.isoenen_US
dc.publisherAddis Ababa Universityen_US
dc.subjectCivilEngineeringen_US
dc.subjectCivilEngineeringen_US
dc.titleThe Unsaturated Shear Strength and Swelling Charac Teristics of Expansive Soils of Arbaminchen_US
dc.typeThesisen_US

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