The Variations of Cation Exchange Capacity, pH, and Zeta Potential in Expansive Soils Treated by Additives

It is well known that swelling of expansive soils can cause considerable problems to lightweight civil engineering structures. To control this problem many additives such as cement, lime, fly ash, and silica fume are used for stabilizing of the expansive soils. In literature, there are a large number of studies on the geotechnical properties (swelling, permeability, strength parameters, etc.) of the expansive soils, but there is a little data on electrokinetic properties such as; cation exchange capacity, pH, and zeta potential of the expansive soils stabilized with these additives. The objectives of this work is to research the variation of cation exchange capacity, pH, and zeta potential in expansive soils treated with additives such as cement, lime, fly ash, and silica fume. In present research, also the descriptive test results are summarized comparing with the literature in detail.