Browsing by Author "Teshome, Mindaye"
Item Developing Correlation Between Index Properties and Swelling Potential of Expansive Soils Found in Sendafa Town, Ethiopia(Addis Ababa University, 2015-11) Teshome, Mindaye; Haile, Messele (PhD)In this study, the relationship between index properties and swelling potential of expansive soil of Sendafa Town is examined. Soil swelling is a term generally applied to the ability of a soil to undergo large changes in volume due to increased moisture content. One of the most important laboratory tests on expansive soils is the swell test and indices. Commonly used laboratory index tests, (namely natural moisture content, Atterberg limits, grain size analysis), and swelling pressure tests were conducted in order to estimate the swelling potential of the Sendafa expansive soil. The soil is classified under AASHTO and USCS classification system. The AASHTO classification of the study area soil falls under A-7-5 and A-7-6 and this means the soil is plastic clay which has a high volume change capacity between wet and dry states. The USCS classification indicates the soil is inorganic clay of high plasticity (CH) with a potential of expansion. Empirical correlations were proposed to relate index property parameters and swelling potential using single and multiple linear regression analysis methods using Microsoft Excel program. From single linear regression analysis plastic index has a better correlation than that of the other parameters (indices) with comparison factors of R2 and P-Value. In the case of multiple linear regression analysis dry density and plasticity index have a good combination effects with swelling. Results of the validity of the newly developed correlation with control test results shows that, the correlation of swelling potential value with soil index properties