Farid Debieb

TL;DR: In this paper, the authors examined the possibility of using crushed bricks as coarse and fine aggregate for a new concrete and showed that it is possible to manufacture concrete containing crushed bricks (coarse and fine) with characteristics similar to those of natural aggregates concrete provided that the percentage of recycled aggregates is limited to 25% and 50% for the coarse aggregates, respectively.

TL;DR: In this paper, the effect of contaminated crushed concrete aggregates on mechanical properties and durability of recycled concrete is investigated and significant differences were observed between the properties of original and new concrete and the results clearly show the necessity of taking these contaminations into account.

TL;DR: In this article, the effects of various RAP sizes as substitute of coarse and fine natural aggregate (NA) on the mechanical properties and durability of roller compacted concrete (RCC) are characterized and compared.

TL;DR: In this paper, the total replacement of natural aggregates by recycled concrete aggregates (RA) in the composition of a roller compacted concrete is compared. And the experimental results showed that the polluted RA are much richer in chlorides than in sulphates and are leached if they are soaked in water.

TL;DR: In this paper, the effect of type of cement and admixture on fresh and hardened properties of concrete with coarse and fine recycled aggregates (RA) are presented Natural sand (NS) and natural gravel (NG) were replaced respectively by (15, 30, 70, and 100%) of recycled concrete sand (RS) and recycled concrete gravel (RG) Two types of cement/admixture were used.