Engineering Properties of Soil Samples From Stable and Failed Sections: An Example of Akure-Idanre Road, Southwestern Nigeria
Publication Date : 23/05/2022
The engineering properties of the subsoil determine the longevity of the structure placed above it. This study is aimed at determining the engineering properties of the subsoil taken from both the failed and stable sections of Idanre road, south western Nigeria. Both Index and strength tests were conducted on the sampled soils. The grain size analysis shows that the coarse contents of the sampled soils range between 73.3% and 93.9% while the fine content range between 6.2% and 26.7% The natural moisture content, liquid limit, plastic limit, plasticity index, linear shrinkage and specific gravity tests range from 4.1% to 13.0%, 22.2% to 40.8%, 0.0% to 25.2%, 2.9% to 38.5%, 6.4% to 10.7% and 2.53 to 2.66 respectively. These tests results show that all the sampled soils are within the acceptable limit of a Nigeria soil. The sampled soils are classified as either silty sand or sand. AASHTO classification shows that the 3 3 sampled soils have ratings of good to excellent. The MDD values range from 1492kg/m to 1607kg/m while the OMC range from 10.0% to16.0%. The CBR values range from 22% to 54% which means that the soils are good as subgrade/subbase materials and not as base materials.
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