Study on Durability of Cement Soil Under Brine Erosion

摘要

In the coastal areas, deep mixing method or high pressure jet grouting method are usually used to form cement soil during the ground treatment. It's easy to inflict corrosion damage of cement soil when the underground confined water is connected to the brine. Therefore, research of the cement soil's durability under the brine erosion is of important significance to engineering. Start from the theory of chemical dynamics and damage mechanics, based on the chemical reaction formula between MgCl_2 and the cement soil, with appropriate assumption, the relationship between ion concentration and corrosion time is deduced: (C_1/C_2)~?=t2/t1 that is: when the soil eroded to equivalent mechanic effect, the relationship of corrosion time can be obtained in the solution with high and low concentration. Based on stress strain relationship, incorporate chemical damage factor into compression modulus, suggest certain assumptions, the same relationship between corrosion time and ion concentration is deduced.