Technology of Non-Burned Brick Using Heavy Metal Polluted Soil and Solidification of Heavy Metal

Ten sets of experiments were designed to process non-burnt bricks by adding different proportion of cement as binder and 10% of carbide slag as activator into heavy metal polluted soil. The results showed that: compressive strength at 3d, 7d and 28d of non-burnt bricks compound by T2 were the highest with 10.552MPa, 19.291 MPa and 20.135 MPa respectively, achieving the high quality standard brick. Besides, leaching concentration of heavy metals were lower than that of GB3838-2002 "environmental quality standard for surface water" in V water requirements; heavy metals Pb, Zn, Cu, Cd mostly exist in the organic and residual fraction with 97.88%90.31%97.44% and 98.92% of the total fraction, respectively.