Laboratory Investigation of the Effect of Deep Soil Mixing Method on Engineering Properties of Soft Clay Stabilized by Slag and Lime

Document Type : Research Article


Department of Civil Engineering, Islamic Azad University, ARAK Branch, ARAK, IRAN


Soft clayey soil generally has high compressibility and low strength. Presence of this soil type in the site of civil projects can always be a challenge. Soil stabilization is one of the useful ways to improve problematic soils. Cutter Soil Mixing (CSM) is almost a new method for deep stabilization. This laboratory study, investigate the effect of various depths of stabilization on the engineering properties of soft clay treated by CSM method. To prepare samples, simulate different depths and related overburden pressures new devices were designed, modified and made. Moreover, mixture of blast furnace slag and hydrated lime slurry was used in this method for the first time. Prepared samples were cured for 28, 56 days under saturated conditions, and various overburden pressures to investigate the effect of this stabilization method on physical and mechanical properties of them. The obtained results revealed that increasing the depth of stabilization decreases the moisture content of the samples, increases their saturated/dry densities and improves the strength parameters of them. Moreover, mechanical properties of the samples showed fewer changes by passing the specific depth.


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