Experimental Study On Dynamic Properties Of Cement Soil In Corrosive Environment

Cement soil is widely used in civil engineering, because of its good performance and lowprice. However, due to the characteristics of cement soil application, which make it often insewage, seawater, ground water and other corrosive environments, the corrosive ions that existin corrosion environment would damage the effects of soil cement. Cement soil is oftenaffected by dynamic load in engineering, such as the earthquake shock, the vehicle rollercompaction and so on. So it is very necessary to research on the mechanical properties ofcement soil under dynamic load in corrosive environment. The change role of mechanicalproperties of cement soil, such as dynamic elastic modulus, damping ratio, dynamic strengthand shear strength, have a great guiding significance for the real projects.Based on the engineering properties of cement soil, simulated the cement soil underdynamic load in the laboratory, analyzed the dynamic characteristics of cement soil, andanalyzed the mechanical properties of cement soil under dynamic load in corrosiveenvironment byABAQUS. The main work is as follow：(1)Making cement soil specimens, which cement ratio are15%,18%and21%. Cementsoil specimens were corroded in sodium sulfate and sodium chloride solution, corrosionconcentrations are0.03mol/L,0.1mol/L and0.3mol/L, corrosion times are10days,20daysand30days.(2)The dynamic triaxial test is conducted to get the dynamic properties of differentcorrosive environments, different cement ratio and different confining pressures.(3)According to the results, analyzed the transformation law of corrosive environment(corrosion solution, solution concentration, corrosion time), cement ratio and the confiningpressure on dynamic elastic modulus, damping ratio, dynamic strength and cohesion andinternal friction angle.(4)The numerical simulation is studied by software ABAQUS. The mesh model isestablished to simulate the stress-strain curve of cement soil under dynamic load, get the stressand displacement data and compare the results with text data.