This paper present the findings of a study into physicochemical properties of highly organic soil mixing with varius binders. The study also investigate increasing unconfined compression strength achieved using founded stabilizers. The influence of concentration of stabilizers as well as dispersion of their pHs on physicochemical properties of organic soil were also investigated. The results proved that even a very low concentration of the reagents (0.001 mol/L) causes a remarkable change of the zeta potential (ζ) of organic colloids. The ζ of the pure organic soil varied from +25.1 to -95.4 mV at pH 2.8 and 11.3, respectively. However, according to the chemical reagents and electrolyte concentration, ζ varied from +189.22 at pH 4.43 for 0.1 M CaCl2 to -88. 2 at pH 9.69 in 0.001 M Na2Co3 solution. The pH of pure organic soils at iso-electric point (IEP) was 3.3. It is noteworthy that using reagents caused a significant shift in IEP to the alkaline part since pH at IEP for Al2(SO4)3, H3PO4, Na2Sio2, and Na2Co3 increased as electrolyte concentration increased. Based on results of ζ, observed from using different cationic species, new binder systems were used. New binders showed a strength increasing to around 350% for soft organic soil. Those chemicals that caused thickening in diffuse double layer also used as secondary additives in order to find their effectiveness in soil strength properties. Optimizing stabilizers cause significant improvement as for electrokinetic (EK) injection method.
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