Compaction properties of lateritic soils (The Case of Assossa)
| dc.contributor.advisor | Haile, Mesele (PhD) | |
| dc.contributor.author | G/medhin, Amare | |
| dc.date.accessioned | 2018-06-13T07:41:29Z | |
| dc.date.accessioned | 2023-11-11T08:29:51Z | |
| dc.date.available | 2018-06-13T07:41:29Z | |
| dc.date.available | 2023-11-11T08:29:51Z | |
| dc.date.issued | 2008-04 | |
| dc.description.abstract | High temperature and moisture fluctuating in tropical areas, enhancing chemical weathering leads to the formation of lateritic soils when the soil is well-drained. These highly weathered tropical materials may irreversibly change properties when dried, and even simply remoulding the material may cause significant change in properties. Embankment construction is one of the major activities in Civil Engineering works, which enhance development. Hence, great attention has to be given during construction of such infrastructures when using the tropical soils as construction materials. Embankments which are constructed using lateritic soils have a great advantage in that they are constructed from locally available materials within sound technical and affordable financial capacity. To use lateritic soils safely and economically, appropriate methods of determining the geotechnical properties, compaction properties, shear strength parameters, unconfined compression strength (UCS) have to be investigated and developed. Accordingly, in this paper the compaction properties of lateritic soils which are taken from Assossa have been investigated. In addition to this, some peculiar geotechnical and geochemical characteristics of these soils have been studied. Accordingly, the soils from Assossa have been obtained to be true lateritic as the geo-chemical test and tests from laboratory indicated. The soil samples were compacted at optimum moisture content, at drier side of the optimum moisture content and at wetter side of the optimum moisture contents. Then, the UCS tests were done on the soil samples to investigate the variation in strength properties as a function VIII of time after compaction of these soils. Keeping the compacted lateritic soil samples for a longer period shows an increase in the UCS values and samples compacted at optimum moisture content have higher values of UCS as compared to the once on the drier and wetter sides. Compaction of these soils has been influenced by depth, drying, mineralogical composition and compaction energy as illustrated in this thesis. Moreover, the effect is higher as the degree of laterization increases. The effect of permeability of compacted lateritic soils in relation to change in compaction moisture content and time effect after compaction were investigated.Acordingly, the effect of compaction moisture shows that permeability decreases towards the optimum moisture content. In addition to this, the time effect after compaction has been investigated and the test showed that permeability decreases as time after compaction increases. The soils are less sensitive to expansion when there is fluctuation of water. Further, the soil is highly sensitive to remoulding of samples as the compaction curves and the degree of sensitivity showed. | en_US |
| dc.identifier.uri | http://etd.aau.edu.et/handle/12345678/612 | |
| dc.language.iso | en | en_US |
| dc.publisher | Addis Ababa University | en_US |
| dc.subject | Case of Assossa | en_US |
| dc.title | Compaction properties of lateritic soils (The Case of Assossa) | en_US |
| dc.type | Thesis | en_US |