Prediction of Soaked CBR value From Index Properties and Compaction Characteristic of Subgrade Soils
| dc.contributor.advisor | Samuel, Tadesse (PhD) | |
| dc.contributor.author | Dereje, Bogale | |
| dc.date.accessioned | 2020-11-25T05:30:28Z | |
| dc.date.accessioned | 2023-11-28T13:46:13Z | |
| dc.date.available | 2020-11-25T05:30:28Z | |
| dc.date.available | 2023-11-28T13:46:13Z | |
| dc.date.issued | 2019-10 | |
| dc.description.abstract | The subgrade provides the foundation for the pavement material and should be well compacted to utilize its full strength. The subgrade strength is related to the CBR value of soil. The CBR test is laborious and time consuming and must always be performed on remolded soil samples. The CBR values depend on the type of soil as well as other soil properties. Hence, it is important to develop correlations between CBR and index properties for the subgrade soils. In this research work, an attempt has been made to establish a correlation of CBR values as function of different index properties and compaction characteristics of soil specific to JinkaMendir design and build road project subgrade soils. In order to achieve the intended correlations, a series of laboratory tests have been conducted on forty one soil samples. Based on the laboratory test results, the collected soil samples are categorized into two groups, namely coarse-grained and fine-grained soils. Accordingly, twenty five of the soil samples are classified as coarse-grained soils and the remaining sixteen soil samples are classified as fine-grained soils. This research work was done on twenty three coarse-grained soils and fourteen fine-grained soils with two control tests for both of the coarse-grained and fine-grained soils. For this research work, statistical software (SPSS) was employed to investigate the significance of individual independent variables. Using multiple linear regression analyses, good correlations were obtained between soaked CBR and index properties test results for coarse-grained and fine-grained soils with coefficient of determinations of 0.866 and 0.931 respectively. After validating the developed correlation with control test results, it was noted that the correlations of CBR values with soil index properties are more applicable for preliminary characterizing of the strength of subgrade soils. | en_US |
| dc.identifier.uri | http://etd.aau.edu.et/handle/12345678/23534 | |
| dc.language.iso | en_US | en_US |
| dc.publisher | Addis Ababa University | en_US |
| dc.subject | Soaked CBR | en_US |
| dc.subject | Subgrade Soils | en_US |
| dc.subject | Compaction | en_US |
| dc.title | Prediction of Soaked CBR value From Index Properties and Compaction Characteristic of Subgrade Soils | en_US |
| dc.type | Thesis | en_US |