In the current study, the effects of three types of additive (lime, cement and cement kiln dust) on the plasticity of a soil are studied. The results of the study indicate plasticity index are affected by the addition of (cement, lime and cement kiln dust) and the effectiveness of these additives depends on the soil treated and the amount and type of additive used. The main results show that with increase of Additive the plastic limit increases and liquid limit decreases, hence decreases plasticity index and it is revealed that a change of soil texture takes place. While Addicrete BV does not effect on the Atterberg limits or the soil texture of the soil. Then the plasticity properties of the soils including liquid, plasticity and shrinkage limits as well as plasticity index were investigated and compared among the specimens in different mixture proportions. Atterberg limits (Plastic limit “PL”, Liquid limit “LL”, and Plasticity index “PI” = LL-PL) play an important role in soil identification and classification.