ABSTRACT
In this study, petroleum contaminated soil were stabilized by mixing pozzolanic fly ash, lime and cement in order to use as a sub-base material. This stabilization produced physically, mechanically and chemically stabilized new mixtures. Unconfined compressive strength, permeability, California bearing ratio (CBR), freeze/thaw (durability), pH, electrical conductivity, cation exchange capacity, total metal content and leachate experiments were conducted on stabilized mixtures. The best result in all of the tests conducted is obtained with petroleum contaminated soil stabilized with Lime (20%) + Fly ash (10%) + Cement (5%). This mixture can be effectively and safely used as sub-base material for the road construction.
