Evaluation of Condor SS as a soil stabilizer

Abstract

In most cases, pavement failures are directly related to subgrade failures. Subgrade failures are normally attributed to soils which are expansive in nature. The expansive properties of a soil can be chemically altered by treating it with certain chemicals such as lime, cement and fly-ash. Condor SS, an electrochemical, has been used in our research to evaluate its stabilization capabilities on Burleson clay as well as its overall effectiveness as a soil stabilizer. Tukey and Duncan comparison methods have been employed to find out whether the differences between soil moduli of stabilized and non-stabilized points at the main test site are significant or not. Again, in another test site, Condor SS has been evaluated on the basis of pre-and post-injection moduli of the soil. And paired-comparisons t test has been used to evaluate the product statistically at this test site. Dynamic Cone Penetrometer (DCP) data have been used for both cases. The effects of injection spacing, injection depth, concentration and interaction among or between the factors have been evaluated from statistical analysis. Statistical comparisons were performed at two significance levels-5 and 10%. Comparisons at the higher significance level gave a few more points that have significantly improved moduli at some specific depths. Tukey and Duncan multiple comparison methods gave identical results on an occasions they were performed. From the investigations, efforts have been made to find out the step-by-step mechanisms by which Condor SS stabilizes a soil.