ECOREB project is structured around three areas of research: (i) water and recycled materials, (ii) mechanical behavior of concrete with recycled aggregates and (iii) durability.
1 Water and recycled materials
The objective of the topic “water and recycled materials” is to develop methodologies to quantify the impact of process of saturation / desaturation of the recycled characteristics of fresh concrete and hardening materials: the rheology of fresh concrete time handling, the plastic shrinkage behavior and the risk of cracking associated to the changes in the micro and meso structure while curing. This line of research will lead to recommendations for the formulation of concrete made from recycled materials, recommendations for the treatment of fresh concrete and mastery of plastic shrinkage and cracking associated.
2 Mechanical behavior of concrete with recycled aggregates
Previous studies have shown that existing models (Eurocode, ACI codes, CEB or Chinese) can not be applied to concrete with recycled aggregates and that such differences are observed for high rates of substitution. The objective of this line of research is to develop models to determine the relationship between the mechanical properties. This is to develop a macroscopic model (elasto-viscoplastic damageable) to describe the behavior of recycled concrete under monotonic loading, cyclic and deferred based on an experimental approach.
The objective of the issue “sustainability” is to evaluate the influence of aggregates from recycling on the performance of concrete durability. It is studying the parameters controlling the corrosion of reinforcement (carbonation and chloride ion migration), the design of coatings of concrete with recycled aggregates, resistance to freeze / thaw, durability indicators and evolution of microstructure using recycled aggregates.