Soil stabilisation involves the application of additives to soil to enhance its engineering properties. The stability of soil is achieved when there is an improvement in the structural arrangement. The study sought to determine the effect of lime on soil stabilisation. Laboratory tests, including sieve analysis, Atterberg limits, and compaction tests, were conducted following standard procedures (BS 1377). Five (5) soil samples were treated with different lime contents (i.e., 0%, 1%, 2%, 4%, and 6% by weight of soil). The test results indicated a decrease in soil plasticity and variations in compaction behaviour with increasing lime content. The untreated soil (0% lime) exhibited a maximum dry density (MDD) of 2152 kg/m³ at an optimum moisture content (OMC) of 8%. Lime addition of 1% and 2% initially decreased MDD to 1967 kg/m³ and 1960 kg/m³, respectively, but at 4% lime content, the MDD increased to 1980 kg/m³ and decreased to 1970 kg/m³ at 6% lime content. These findings highlight the potential of lime stabilisation to enhance soil properties for road construction, offering a cost-effective and sustainable solution to improve pavement durability and performance. The study underscores the importance of optimising lime quantity and moisture content for achieving desired engineering properties, contributing valuable insights for sustainable infrastructure development in regions with challenging soil conditions

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Keywords

Engineering performance; Ghana; road construction; soil stabilization