From experimental data, the results for soil-cement mixing are presented in Table 4. The experimental results with 16 tests represent the unconfined compressive strength and modulus of elasticity during the 28 days after addition of water. The cement content (CC), curing time (T) and dry density (DD) are linearly dependent predictors of the cement content, the curing time and the dry density of soil. Variable (UCS) and (ES) are the unconfined compressive strength and the modulus of elasticity, respectively. The multiple regression model [14] was proven to have a good fit with inclusion of all the two predictors (UCS and ES) presented as given in Eq. (2).