Shear Strength Behavior of the Flyash-Treated Lime Columns on Expansive Soils

Expansive soils are the most problematic soils for civil engineering constructions. In recent years, rapid growth in population results in construction of multi-storied buildings in even problematic soils to meet their needs. Hence, the stabilization of expansive soils is necessary to improve expansive soil mechanical properties. As a civil engineer, one should deal with such problematic soils in a proper way because any mistakes in the soil study lead to hazards. The objective of this work was to investigate the mechanical properties of flyash-treated lime column stabilized expansive soil which is the best solution for civil engineering works which are undertaken in the expansive soil stratum. Remolded compacted clay soils were prepared in tanks with lime columns and flyash-treated lime columns installed in them. The soil samples are extracted after curing and properties of the samples were investigated as a function of flyash content added and curing periods. It was observed there are significant changes in the shear strength of treated soil due to the reactions between soil and flyash–lime.