At present, construction and demolition residues (RCD) generated by formal and informal constructions have no intended use, and there is a diverse accumulation of these residues in public spaces and cultural patrimonies of the city and the country. In this way, investigating in the alternatives of reuse of the RCD to diminish the environmental contamination and to improve the quality of life of the living beings, the use of the recycled concrete aggregate (ACR) was raised as replacement of the natural thick aggregate for the elaboration of structural concrete, destining its use in the construction of buildings; finally, in the short term, to arrive to normar in the design of reinforced concrete. The purpose of the investigation was to determine the influence of the replacement of natural aggregate by ACR on the mechanical properties of the concrete, for this /cm2 purpose, a mixture desig...