Coastal regions with deep deposits of soft clays cause many problems associated with the engineering construction since they have low strength and high compressibility. Chemical admixture improvement is one of the effective techniques. This technique can be applied for the deep and shallow foundations. Surplus clay, such as waste clays from construction works, can also be improved by this technique to be an engineered geo-material. Based on the oedometer and triaxial test results, here it is revealed that the clay water content/cement ratio, wc/c is the dominant parameter, which governs deformation and strength characteristics of the stabilized clays. As a result, two simple equations related to wc/c for predicting strength and combining the realtions among strength, curing time, water content of clay and cement content are presented.
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