Enamels have been prepared based on mixtures of a transparent frit and glass obtained from waste mining Ni-Cu-Co. These glasses were also fried and grounded in wet up to a size less than 50 µm. Frit-glass mixtures were prepared with 5, 10, 15 and 20% by weight of glass and were cooked at 1100 º C. The mechanical and optical properties of the enamels obtained were determined and they were correlated with the concentration of glass in the mixture as well as with the presence of minority elements in the glass. Since the glass of mining waste forms crystalline phases type augite at temperatures close to 910 º C, the percentage of glass in the enamel significantly influences the microhardness. The enamel does not present important crystallizations up to 10% percentages, these being very significant for values of 15 and 20%. The figures show the microstructures formed both on the surface of the enamel of the pavement and on the inside of the enamel.
