摘要：High organics contaminated soil is a common concern for the solidification and stabilization (S/S) method.A probable problem with using S/S technology for the immobilization of organics is that these compoundsare generally non-polar and hydrophobic; thus, they do not react with the inorganic binders and may interferewith solidification by disrupting the gel structure of the pozzolanic mix. In this research, the effect of microsilica(as an additive) in solidification of polycyclic aromatic hydrocarbons (PAHs) contaminated soil samples,collected from Ray Petrochemical Industry, was investigated. Solidification of soil sample was carried out byusing cement and microsilica (MS) with different mass ratios. The behaviour of the solidified pastes hasbeen analysed in terms of unconfined compressive strength (UCS). The results of this research indicatedthat the highest UCS of 1274.5 Kpa was achieved for samples contained 25% of cement and 8% of MSwhich was greater than the guidance value of 344.7 Kpa (50 psi) proposed by USEPA.
