Magister in mechanical engineering option mechanical of materials and surfaces, That is a formation during which I learned knowledge on the materials that it is metals, mineral materials or polymers as well as the treatments and the modifications of the surfaces. The subject of my thesis of magister was "Elaboration and Characterization of a Material based on Phosphate of Potassium and Magnesium", the objective was the realization of a new phosphomagnesian cement based on local raw materials.