Investigation Into Some Of The Engineering Properties Of Soils Found In Mojo Town

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Today Mojo has expanded considerably with new buildings, railways, roads, industriesand dry port. Therefore, a better understanding of the subsoil is required. It is also worthmentioning that, Mojo is located in the rift valley of Ethiopia thus placing it in seismic activzone. According to EBCS 8, 1995 the city is located in zone four rnThis research work is carried out to investigate the static engineering properties of MojoTown. To achieve this objective, soil samples were collected throughout the town andlaboratory and field tests were conducted. rnAccording to results of the field test, the in-situ density ranges from 1.40 to 1.70g/cmand the dry density have a value from 1.12 to 1.61g/cm3. rnFrom the grain size analysis result, the soil of the town has clay content ranging fromrn10.03 to 32.32%, silt fraction from 36.82 to 80.65%, sand fraction 5.77 to 92% and gravelrncontent from 0.0 to 18.77%.rnrnThe Atterberg limit test on the research area showed a liquid limit range from 29 to 87%plastic limit ranging from 18 to 50% and plastic index from 11 to 46%. rnThe specific gravity ranges from 2.62 to 2.70 and the Free swell ranges from 20 to 60%From the compaction test result the maximum dry density (MDD) of Mojo soil ranges from1.15 to 1.83 g/cmrn3 rnand the optimum moisture content ranges from 14.57 to 44.33 %. rnAccording to Unified Soil Classification System (USCS), The research area shows widernrange of category which include silt, silt with sand, sand and sandy silt with gravelrnrnFrom the Direct shear test results which is conducted on representative samples collectethe research area have angle of internal friction ranging from 12rn0 rn rntorn0rn29rn rnrnFrom the unconfined compression tests, Mojo soil unconfined compressive strength (qu),rnranges from 135 to 179 kPa, Undrained Shear Strength (cu), ranges from 68 to 90 kPaand the research area have stiff consistency. rnFinally, from consolidation tests the soil in the research area is over consolidated in itnatural state with compression index ranging from 0.3 to 0.32, coefficient of consolidationrnranging from 0.24 to 0.82 rn and coefficient of permeability ranging from 1.83 torn⁄rn23.4710rn rn ⁄

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Investigation Into Some Of The Engineering Properties Of Soils Found In Mojo Town

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