Abstract
The strength increase characteristics of cement treated soils, which were made of 3 marine dredged clays with different initial water contents and cement contents, were studied by a series of strength tests with curing times. It was known that the initial strength of cement treated soil is almost determined by the normalized water content w'/wL, where w' is a water content after cement mixing and wL is the liquid limit of clay. The strength and the curing time shows the linear relationship in the double logarithmic plots, and the gradient is determined by the cement content. Based on the experiments, the equations to predict the strength of cement treated soil with curing time were proposed. The strength calculated by the equation agreed well with the strength measured in the experiments.