Abstract
High Performance Concrete (HPB) is an innovative concrete that finds its place in modern constructions. New techniques for formulating and designing high-performance concrete have improved durability and achieved outstanding mechanical properties compared to conventional concrete, acause thanks to the improvement of its rheological qualities and its very limited porosity.
This has allowed to expand his field of employment especially in aggressive environments. Natural aggregates, frequently used, are now a non-renewable resource whose accessibility is continually declining.
Recycling of High Performance Concrete (HPC) waste in the form of recycled aggregates in the manufacture of a new range of high-performance recycled concrete with improved properties will lead to an understanding between performance and cost in order to achieve a resistant material with durability increased.
The aim of this study is to identify and analyse the characteristics of high performance recycled concrete aggregates based on two types of mineral additions (silica smoke, slag) which influence the properties of the concrete in a fresh and hardened state.
This study highlights the effects of substitution of natural aggregates by recycled aggregates (30% sand and gravel 25%, 50%, 100%) on the mechanical resistance of recycled high-performance concrete.
Examination of the results obtained has made it possible to establish the correlations between natural and recycled aggregates and on the physico-mechanical characteristics.
The analysis of these results also showed the interest of total or partial substitution of recycled aggregates based on silica smoke compared to recycled aggregates based on Algerian slag in the formulation of High Performance Recycled Concrete (HPRC) from the point of view of mechanical performance (strength).