Based on the service ambient with sulflate condition

the evolution of strength unconfining

elastic modulus and stress-strain curve of corresponding samples under various conditions are investigated by experimental simulation method; the deterioration of mechanical properties of soil cement is also studied. Results show that the parameters of different rations of cement to soil and different water contents and ambient condition have great influence on strength and elastic modulus of soil cement. The mechanical behaviors such as compressive strength and elastic modulus of soil cement can be degraded by underground water with sulfate due to complicated physicochemical reaction between soil cement and water and sulfate ion in ambient. And the bad effects of sulfate ion in ambient on mechanical behaviors of soil cement is prominent within 90 d ages.