The problem of environmental pollution results in the accumulation of heavy metal ion in soil

which not only influences the engineering properties of soil

but also threatens the health of human beings. Currently the cement solidification technology (S/S method) is adopted to treat heavy metal-contaminated soils. However

with the increase of concentration of corrosive salt in the groundwater

the solidified heavy metal-contaminated soil can be influenced by the corrosive salt ions

resulting in the deterioration of the strength of soil and leaching-out of the heavy metal ions. A series of systematic laboratory tests is conducted to investigate the strength and leaching characteristics of chromium polluted soil solidified with cement after soaking in NaCl solution. The experimental results show that the unconfined compressive strength of chromium polluted soil solidified with cement decreases with the increase of the concentration of NaCl solution

and decreases at first and then increases with soaking time

and the minimum strength is determined after 7 d soaking. The results of the toxicity characteristics leaching procedure (TCLP) show that the concentration of Cr3+ in leachate increases with the increase of NaCl concentration

and decreases with the increase of soaking time. The pH value of leachate decreases with the increase of NaCl concentration

and decreases at first and then increases with soaking time

and the minimum concentration of Cr3+ is got when soaking 7 d. when the pH value of leachate is within the range of 4.0 to 5.5

the leaching quantity of Cr3+ decreases with the increase of pH value.