With the significant progress in the, combining global industry section, new technoligies come the increased generation of solid waste and the consequent concern with the correct management. One of the major problem of the foundry industry is the generation of solid waste mainly constituided by residual sands or discarded foundry sands. (ADF). The proper disposal of this waste is a challenge for the industries that are increasinly concerned in the need to preserve the environment in pursuit of sustainable long-term development. In Brazil the production of castings in 2008 exceeded 3 millhion tons, with the generation of approximately one ton of waste for each ton of pruduced metal. The main destination of this waste currently occures in industrial landfill disposal that bisides having a high cost which is an increasing environmental concern for the companies. Solving this problem is one of the duties of this work or in other words we propose a methodology to reuse solid waste. We tested our metodology, specimens have been made with the incorporation of foundry sand at different concentrations in ascending order in every 5% replacing the natural sand for casting sand. Throught this article we have shown the proposed metodology for the use of concret blocks.