Stabilization of Low Bearing Soil Using Fly Ash and Chemical Additive Polybond

The results of laboratory research of high plasticity clay stabilization using liquid chemical additive Polybond and the fly ash from Serbian thermal electric power plant Kostolac are presented in this paper. In order to determine the effects of stabilization, extensive laboratory study of physical and mechanical properties of the stabilized soil (unconfined compression strength, shear strength parameters, CBR, deformation parameters, swelling, coefficient of permeability, resistance to freezing) were performed. The results of the research clearly indicate the positive effects of the clay stabilization using Polybond, as well as fly ash, and confirm that these additives can be successfully applied as a clayey soil stabilizers in various practical applications such as: stabilization of low bearing subgrade, construction of embankments and geotechnical structures of low permeability, improvement of mechanical properties of top subgrade layers etc. The use of stabilizers reduces energy consumption, as well as the usage of natural materials such as stone aggregates.