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The stability of infrastructure is a major concern for various economic, ecological or, more importantly, the security of buildings. This can be done by different techniques, mechanical, chemical or both, to improve the geotechnical properties of unstable soils. The techniques used are the additions, of which, the most common are lime and cement.. The purpose of this study is to determine the evolution of the geotechnical properties of a shale soil of the university center of El-Aouana in the wilaya of Jijel (Algeria). The sample taken on site was modified with additives proportions, 0, 1 %, 3% and 7% of the replacement of cement and lime in dry weight in order to test the different properties of the fresh paw of clay soil. Finally, on conclude that the addition of a binder (Cement or lime) to shale soil causes a reduction in plasticity, an improvement in compaction characteristics with Proctor, a rapid increase in the immediate lift index depending on the treatment. and an increase in cohesion and the angle of friction. [ABSTRACT FROM AUTHOR]