the following standard engineering mechanical parameters were obtained: stress at the proportional limit,stress at the yield point, stiffness and resilience. The proportional limit identifies the end of the initial linear stress-strain region, the yield point represents a common measure of the transition from elastic to permanent deformation, the stiffness is the ratio of stress to strain in the elastic region, and the resilience refers to the amount of energy required for complete elastic deformation. Artificial mixtures were melted, moulded and tested following the same methods.