Stabilization of Residual Soils Using Liquid Chemical
Civil Engineering Department, Faculty of Engineering, National Defense University of Malaysia, Kuala Lumpur, Malaysia
There are numerous soil stabilization techniques for improving the strength of the in-situ soil especially in road construction, and one of the techniques is using chemical additive. Chemical improvement is a time saving method that enables subgrade or sub-base layer and otherwise unsatisfactory materials in-situ to obtain higher density and strength, obviating the need for costly excavation and replacement with borrow material. This paper presents some results of the preliminary stages of research program carried out to explicate the mechanism and behavior between the liquid chemical and the engineering properties of three natural residual soils at laboratory scale. Liquid-formed chemical was selected in this research due to scarcity of such findings instead of the prevalent solid chemical additive such as lime, cement or fly ash. The focus on this research is on the improvement of engineering properties of three natural residual soils and mixed with different proportions of liquid chemical. Series of laboratory test on engineering properties, such as unconfined compressive strength (UCS), consistency limits, moisture-density relationship (compaction) was undertaken to evaluate the effectiveness and performances of this chemical as soil stabilizing agent. The results show that addition of the liquid stabilizer can reduce the shrinkage and plasticity of the soil as well as the optimum moisture content. Subsequently, the maximum dry density and the compressive strength are increased.
Keywords: Residual soil, Consistency Limits, Compaction, Unconfined Compressive Strength (UCS).
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