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Addis Ababa University Libraries Electronic Thesis and Dissertations: AAU-ETD! >
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http://hdl.handle.net/123456789/2999
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| Title: | PREDICTION OF CALIFORNIA BEARING RATIO (CBR) VALUE FROM INDEX PROPERTIES OF SOIL |
| Authors: | Zelalem, Worku Ferede |
| Advisors: | Dr Hadush Seged |
| Copyright: | Apr-2010 |
| Date Added: | 11-May-2012 |
| Publisher: | AAU |
| Abstract: | With the objective of predicting CBR value from index properties of soil, granular and silty-clay
soils data, having all the associated test results with corresponding CBR values, were collected from
consulting firms and control laboratory tests were done from subgrade soils around Addis Ababa.
For granular soils, the independent variables considered are optimum moisture content (OMC),
maximum dry density (MDD) and 60% passing sieve size (D60). A strong correlation was
established between CBR, OMC and MDD with coefficient of determination of 0.863 for a sample
size of 53.
For the case of silty-clay soils, the considered independent variables were the liquid limit (LL),
plastic limit (PL), plasticity index (PI), optimum moisture content (OMC), percent passing sieve
number 0.075mm (P200) and Maximum dry density (MDD). A reliable strong correlation as for the
granular soils couldn’t be established .The maximum value attained for the coefficient of
determination is 0.564 for a sample size of 106 for a correlation between CBR, LL and P200 |
| URI: | http://hdl.handle.net/123456789/2999 |
| Appears in: | Thesis - Civil Engineering
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