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|Title: ||BLENDING OF CINDER WITH FINE-GRAINED SOIL TO BE USED AS SUB-BASE MATERIALS (The Case of Butajira-Gubre Road)|
|Authors: ||YITAYOU, ESHETE|
|Advisors: ||Dr. Hadush Seged|
|Keywords: ||sub-base, Cinder Gravel,|
Blending of sub-base material
Optimum finegrained soil Content
|Copyright: ||Jul-2011 |
|Date Added: ||7-May-2012 |
In road construction, the use of locally available materials should be made as much as possible.
However, these materials are not always suitable and when appropriate material cannot be found
in areas close to the construction site, very high prices have to be paid with significant time
delays and cost increases.
In many parts of Ethiopia, there is widely distributed cinder gravel. However, this material has
the problem of compaction due to its light weight, its rough circular surface and its high porosity.
This thesis deals with investigating the performance of mechanically stabilized natural cinder
gravels to be used as road sub-base material. To achieve the Ethiopia Road Authority manual
specification, the cinder gravel was blended with some trail proportion of 0, 5, 10, 15, 20, and 25
% of fine-grained soil by mass and different tests including grain size distribution, Atterberg
Limit, compaction, CBR, LAA, absorption and linear Shrinkage are conducted in the laboratory.
Based on the laboratory test results it is shown that, from both MDD- percent of fine-grained soil
curve and CBR-percent of fine-grained soil curve, the optimum amount of fine-grained soil
required in order to improve its properties is 19 % by mass proportion.|
|Appears in:||Thesis - Civil Engineering|
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