Technology

The innovation enables effective separation and sorting of the individual components of EOL concrete, i.e., aggregate, sand, and (hardened) cement paste, through the combination of a mechanical process (Advanced Dry Recovery, ADR) and hot gas treatment (Heating Air Classification System, HAS).

• With this technology 100% of the EOL concrete can be recycled into new high-quality materials for the production of new concrete. So no scarce raw materials have to be mined. The technology removes a significant part of the hardened cement paste from the aggregates. This leads to aggregate with a low grade of water Because of these clean aggregates, a high amount of aggregates and sand, even up to 100% can be replaced.
• The ultra-fine cement paste particles with a large amount of CaO can be used to produce cement binders which are low on CO₂, because cement is the largest driver of CO₂ emissions in concrete this will help to reduce a big part of the CO₂ emissions from concrete.
• The technology of C2CA makes it possible to not only recycle the coarse aggregates but also the fine and ultrafine Because of this 40% less material will be used as low-quality road base aggregate or be landfilled. In addition to the fact that this will have a huge impact on the amount of waste, the technology also adds extra value to 40% of the material because it can be used in new concrete so higher material revenues can be charged.
• Due to the continuous quality control based on a LIBS (Laser Induced Breakdown Spectroscopy) analysis, the aggregates are also of constant, documented quality. As a result, adjustments can be made on site if necessary, and the time-to-market of the high-quality circular raw materials for concrete is considerably shortened. Together with the use of the RFID tags the traceability of this quality is secured.