sorting, collection waste
Making sustainable concrete using recycled materials is possible Recycle concrete into concrete aggregates and sustainable cement? Yes it's possible. This was demonstrated by the transnational cooperation project C2CA, which tested the possibility of recycling 20,000 tonnes of old concrete. The CBR/ENCI cement lab in Maastricht and the concrete lab in Rotterdam actively participated in the project, which was recently completed.récupération de béton Ideal for aggregates What exactly does the C2CA demonstrate? That recycled aggregates have nothing to envy to natural aggregates. On the contrary, says Marcel Bruin from our concrete lab: 'The C2CA has given an idea of what is possible with the recycling techniques studied: ADR (Advanced Dry Technology) in combination with autogenous grinding. If we look at the applicability of recycled products in cement and concrete, we find that it is successful for aggregates. On the other hand, the applicability of fines in clinker and cement is minimal. In its laboratories, the University of Delft has examined other recycling techniques. In addition, the in situ quality control of all flows entering and leaving the recycling process was also studied. The cement lab of CBR/ENCI in Maastricht carried out an extensive production trial on the fine fraction of recycled concrete. This cement, together with the aggregates, was then subjected to an in-depth analysis of the concrete. This was done at the concrete lab in Rotterdam, at Heidelberg Technical Center and at Holcim. Marcel Bruin : 'All recycling products make it possible to produce high-quality, durable concrete. Research carried out by another partner in the project (AGH University of Science and Technology, Krakow, Poland) seems to demonstrate that recycled aggregates are no less efficient than primary aggregates. How it is possible ? Due to a slight film of cement stone on the particles.' C2CA stands for 'Advanced Technologies for the Production of Cement and Clean Aggregates from Construction and Demolition Waste'. The project now has a sequel called HISER: 'Holistic Innovative Solutions for an Efficient Recycling and Recovery of Valuable Raw Materials'. 1 – What are the different methodologies for processing fresh concrete returns? Today, BPE and prefa can take advantage of different methodologies to ensure the recycling and recovery of their fresh concrete returns. Historically, settling ponds are the primary treatment technique. The router pours the concrete into a first basin, in which the returns decant. The charged waters are clarified by overflowing towards a second basin, then a third, and so on. When an initial basin is full, it must be cleaned out, carried out by a subcontractor or by teams from the BPE plant. As for the water from the last basin, it is suitable for reuse in manufacturing and can be sent via a scale in the production process. However, this system involves strong civil engineering, a large floor area and limited adaptability in the event of heavy traffic.