Effect of Organic Soil Acidity on the Properties of Iraqi Soil
Keywords:
Organic Soil, Hydrated Lime, Leaching, Acidity.Abstract
There are many problems with the constructing over organic soils as the existence of these types of soils always produces geotechnical and engineering problems for regional development. The geotechnical properties of inorganic soil greatly differ from organic soils, which is known for its high water content, low shear strength, high compressibility, acidity and long-term settlement. In this paper, two soils are chosen according to its organic content and acidity content then physical and chemical properties is done to know them characteristics and leaching process is performed to reduce its acidity that affect the properties of it and study the change of leaching on these properties. Dry hydrated lime is added to the natural and leached soils depending on the optimum lime content to improve their performance. From the physical tests, shear strength tests and consolidation test it can be noticed that the soils are behave better after leaching as it reduced in plasticity index, compressibility, and swelling and increase in shear strength. Furthermore, the leached soils are needed less percentage of lime content to produce a pH of 12.4 and the stabilized leached organic soils are behave better than the stabilized natural soils.
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