The process in the conventional civil construction almost always uses raw materials did not renew of natural origin, with intense industrialization, advent of new technologies, population growth and increase of people in urban centers and diversification of the consumption of goods and services, the residues if they had transformed into serious urban problems with an onerous and complex management, considering if accumulated volume and mass, mainly after 1980. The problems if characterized for scarcity of area of deposition of residues caused for the occupation and valuation of urban areas, high social costs in the management of residues, problems of public sanitation and contamination. The amount of solid residues that the sector of the civil construction generates, is each bigger time, therefore it has been a great concern in the whole world, in function of the ambient, economic and social questions. In this way the recycling of these residues, is used in aggregate production becoming an interesting alternative and mainly generating income. The process of P& D (Research and Development) of recycling has as objective to minimize, or even though to eliminate total the residues, with sight to the support in the constructive sector.
The importance of the recycled residue constantly is enhanced, being a great one benefits social. As publication CONAMA n. 307 year 2002, that it determines lines of direction for an effective reduction of ambient impacts provoked by these materials, establishing that the generators are the responsible ones for the produced residue and that with priority objective must be not the generation and in case that is not possible must establish the reduction, reutilizao and recycling. This concept has left of the beginning of that the attendance the basic necessities of the populations in the gift, do not affect the future lives. The use of resources must in accordance with occur the spare capacity of the nature, of form that the growth economic it does not come to attack or to devastate ecosystems violently and can at the same time, to repair the serious problems social.