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Please use this identifier to cite or link to this item: http://hdl.handle.net/123456789/2771

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
Gradation
Arithmetical proportioning.
Copyright: Jul-2011
Date Added: 7-May-2012
Abstract: ABSTRACT 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.
URI: http://hdl.handle.net/123456789/2771
Appears in:Thesis - Civil Engineering

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