The red mud leachate is strong alkalinity. Firstly

the red mud leachate are analyzed

and simulated by alkali solution; the clayey soil samples from Shanxi province are used in this research; the physical properties of soil is studied under the effect of alkali solution further corrosion; the corrosion time effect is analyzed especially. Then the intensity variation of red mud reinforced sample

which is reinforced by using cement (or fly ash)

is analyzed further under long-term corrosion. Study results show that the intensity change of the reinforced sample with different curing times

which is in immersion of alkaline solution

mainly occurred in the early stage of the whole immersion process

and that the strength of the reinforced sample tends to be stable under the combined action of a long-term condensation process and corrosion effect

namely unconfined shear strength of red mud reinforced sample has no obvious attenuation in corrosion later stage of alkaline solution; and it is feasible for red mud reinforced by cement and fly ash.