关键词: 铬;污染土;无侧限抗压强度;淋滤特性;水泥

Abstract: In order to solve the problems of soil and groundwater pollution caused by heavy metal chromium, the Cr (VI) and Cr (III) test research on the cement solidified soil was carried out in the polluted soil of Shenyang chromium slag.The determination of cement content, curing period, different content and valence of chromium were tested to affect the unconfined compressive strength and leaching characteristics of solidified soil.The results show that the cement is an effective curing agent for Cr (VI) and Cr (III) contaminated soil, and the cement content is 20%.Cr (VI) and Cr (III) have a weakening effect on the strength of solidified soil and Cr (III) weakening effect is more obvious.The change of the strength of the solidified chromium contaminated soil is explained from the SEM images, which is consistent with the experimental results of unconfined compressive strength.

Key words: chromium;contaminated soil;unconfined compressive strength;leaching behaviour;cement