Geochemistry of soil stabilization

This study was centered on elucidating the chemical reactions that bring about soil stabilization and modification during soil chemical stabilization without which there won’t be the achievement of an anticipated improved soil for most engineering works. In the course of the study, this research has been able to establish the reactions between soil and cement, bitumen, and the chloride compounds. It has been established that the chemical compounds found in soil; quartz, feldspar, dolomite, calcite, montmorillonite, kaolinite etc. react with the chemical constituents found in different identified chemical stabilizers. Cement for instance contains the calcium silicates, the calcium aluminates, and the calcium alumino ferrites that in turn react with the soil (clay) chemical compounds to form the matrix of soil used as either subgrade or subbase materials. From the work, it is observed that quicklime reacts in a deeper extent by dehydrating the soil. Through this process of dehydration, it becomes more useful by changing to hydrated lime. This is the stage where the main chemical reactions that led to soil stabilization starts. This research work will better place designers, constructors and researcher on the choice of soil chemical stabilizer and techniques and the extent of chemical reactions that take place during soil chemical stabilization.