Stabilization Of Expansive Soils With Lime (a Case Study On The Adura-burbey Ds6 Road Segment)

Expansive soils occurring in arid and semi-arid climate regions of the world causernserious problems on civil engineering structures. Such soils swell when given an accessrnto water and shrink when they dry out. Several attempts are being made to control thernswell-shrink behavior of these soils.rnSoil stabilization using chemical admixtures is the oldest and most widespread methodrnof ground improvement. In this study, hydrated lime, were used for stabilization ofrnexpansive soils.rnHydrated lime is one of the chemical stabilizers used in expansive soils. Hydrated limernof percent varying from 2 to 12 percent (by dry weight of the soil) is used to investigaternthe physical and chemical properties of the expansive soils.rnThe following tests are conducted to evaluate the properties of the expansive soilsrnbefore and after the addition of lime.rn Atterberg limitsrn Shrinkage limitsrn Linear shrinkagern Specific gravityrn Free swellrn Moisture density relation shipsrn California bearing ratio (Soaked CBR) CBR Swellrn Unconfined Compressive strength( immediate and 7 days cured)rnThe liquid limit has decreased, with the increase of plastic limit. As a result of this thernplasticity index of the stabilized soil has improved to the required level. The shrinkagernlimit, specific gravity, CBR and Unconfined compressive strength of the stabilizedrnsample have increased with the addition of lime. Swelling percentage (CBR Swell)rndecreased with increasing stabilizer percentage.rnThe lime content of which the CBR values improved for the use of improved subgrade isrnfound out to be 12% by dry weight of the soil. But further investigations are needed forrnits cost and other stabilization techniques and chemical stabilizer.

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