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Please use this identifier to cite or link to this item: http://hdl.handle.net/123456789/3535

Title: INVESTIGATION ON SOME OF THE ENGINEERING CHARACTERISTICS OF SOILS IN ADAMA TOWN, ETHIOPIA
Authors: DEBEBE, DAGNACHEW
Advisors: DR. MESSELE HAILE
Keywords: property of soil
Adama
Atterberg Limit test
Copyright: Dec-2011
Date Added: 31-Jul-2012
Abstract: Investigation of the ground conditions is used for the economical design of the sub structural elements. It is also necessary to obtained sufficient information on type, characteristics and distributions of a soil and rock underlying at a site of proposed structures for feasibility and economic studies for the proposed project. The objective of this research is to investigate the engineering property of soil found in Adama town. To achieve its objective samples from different parts of the city were collected and laboratory tests were done on the collected samples. The grain size analysis test result showed that the dominant proportion of soil particle in the research area is silt, which have clay content ranging from 5.4 – 40 5%, silt faction 17.6 - 60.7%, sand fraction 14.5 - 54.6% and gravel content from 0.0 – 24.8%. The result of Atterberg Limit test on the soil in the research area showed a liquid limit ranging from 29 – 73%, plastic limit ranging from 21 – 35% and plastic index from 13 – 34%. The Specific Gravity ranges from 2.40 to 2.70. Free swell test conducted on the samples collected shows range from 18 – 50%. From the compaction test results the maximum dry density (MDD) of Adama soil ranges from1.20 to 1.62 g/cm3 and the optimum moisture content ranges 17.5 to 36.5 percent. According to the Unified Soil Classification System, the soil is categorized as silt and silty sand. The AASHTO Classification System shows that the usual types of significant constituent materials of the Adama soil are silt soil and clayey soil. Finally one-dimensional consolidation test was done and it shows that the area under investigation is over consolidated in its natural state, have compression index ranging from 0.33-0.40, recompression index ranging from 0.017-0.066, coefficient of permeability ranging from 10-7 to 10-9 cm/sec and modulus of compressibility ranging from 3600-7500 kPa.
URI: http://hdl.handle.net/123456789/3535
Appears in:Thesis - Civil Engineering

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