Abstract:
The building materials industry is always accompanied by secondary products or waste that
have an impact on the environment. In Western countries the rejection of solid waste from
factories building materials and demolition of buildings in Discharges is strictly prohibited.
The management of solid waste is a major environmental concern in the world. With the
rarity of discharge space, the use of waste has become an attractive alternative to disposal;
This research is conducted on the use of waste and by-products in concrete. These products
include concrete demolition, waste glass and brick, each waste has a specific effect on the
behavior of fresh and hardened concrete. The research program therefore includes work on
waste recycling construction / demolition and by-products, as well as the development of new
materials : traditional concretes/self-compacting or mortars based on these recycled
aggregates with integration of Algerian raw materials.
In our study, the development of a first variety of conventional concretes was by varying the
substitution rates of recycled concrete coarse aggregates: )0 - 25 - 50 - 100 %( with variation
in cement dosage : 250, 350 and 450 Kg/m³ and rates of )0 - 25 - 50%( of glass waste for a
second variety, while for the production of self-compacting concretes, we have adopted rates
of )0 - 10 - 20 - 30 - 40 et 50%( of powder brick waste and )0 - 25 - 50- 75 - 100%( of brick
waste sand for mortars.
In this study, we have seen the behavior of fresh and hardened of different materials
developed with recycled aggregates, by comparing the results with other previous studies. The
recycled concrete aggregates are generally more absorbent and less dense than ordinary
aggregates. The shape of the recycled aggregates is similar to that of the crushed stone.
Concretes made with these aggregates have good handling qualities, The compressive
strength will vary depending on the substitution rate. More the substitution rate of recycled
aggregates is increasing compressive strength decreases, and then we can use these aggregates with limited rates in concrete and mortar.
