Over the last years it was possible to observe an increasing concern in terms of sustainability and environmental preservation. This work aims to make a contribution in this direction, particularly through the development of a more sustainable material, with lower environmental impact, employing a technique that allows to face the industrial waste as raw materials. The earth as building material has a millenary use, proven by the important monuments that have survived till nowadays. The alkaline activation, while technique for the production of alternative binders, has shown a great potential, evidenced over the last years. Through the use of the soil and alkali activated fly ashes was possible to develop a material for the manufacture of compressed earth blocks (CEB) with mechanical performance, either individually or at the level of the masonry itself, suitable for use in this type of structure.