ABSTRACT
The aim of this chapter was to review pozzolanic agents, such as lime and fly ash, in order to assess their effectiveness in controlling swelling in expansive soils induced by moisture content variation. Pozzolanic agents such as lime and fly ash were found to be effective in controlling swelling in expansive soils induced by moisture content variation. The pozzolanic reaction compounds formed bind the soil particles strongly resisting the internal swelling pressure of the clay. Calcium based stabilization is very effective in the presence of alkali solution and has been successfully applied to control the alkali-induced heave in expansive soil.
