Characterization of Demolished Concretes with Three Different Strengths for Recycling as Coarse Aggregate

This paper presents a physical characterization for the recycling into new concretes of three comminuted concretes: C16/20 (“ordinary concrete”), C50/60 (“high strength and C70/85 (“very high concrete”). The top size crushed was 19.1 mm range 4.75 to mm. carried out with coarse aggregate liberation, be prepared concentrated in gravity concentration process. density distribution aggregate, cement paste, sand different ranges (4.75/19.1 mm; 4.75/8.0 8.0/12.5 12.5/19.1 mm) studied. form factor samples, as well porosity determination particles ranges, are presented. obtained results indicate that liberation more intensive low resistance concrete (C16/20), but reasonable recovery is possible all concretes.