Soil Stabilization by using Lime
Lime is a calcium- containing inorganic mineral in which carbonates, oxides, and hydroxides predominate. In the strict sense of the term, lime is calcium oxide or calcium hydroxide. It is also the name of the natural mineral (native lime) CaO which occurs as a product of coal seam fires and in altered limestone xenoliths in volcanic ejecta. The word lime originates with its earliest use as building mortar and has the sense of sticking or adhering. These materials are still used in large quantities as building and engineering materials (including limestone product cement, concrete, mortar) as chemical feedstocks and for sugar refining, among other uses. Lime industries and the use of many of the resulting products date from prehistoric times in both the old world and the new world. Lime is used extensively for waste water treatment with ferrous sulphate made to observe the effectiveness of stabilizing agent lime in improving various engineering properties of soil like liquid lime, plastic limit, plasticity index Black cotton soil is a highly clayey soil. In general, all lime treated fine-grained soil exhibit decrease plasticity, improved workability and reduce volume change characteristics. However, not all soil exhibit improved strength characteristics. It should be emphasized that the properties of soil lime mixtures are dependent on many variables. Soil type, lime type, lime percentage and curing conditions (time, temperature) It has been observed that CBR values increased with lime content, for black cotton soil. It is observed that value increased significantly after addition of lime content. The stabilized soil can be used as subgrade, sub base and base course without aggregate. The test result indicates that lime may be used to save natural resources like aggregate and murum.
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