Sustainable Concrete Recycling Solutions | Re-Con Line

Circularity in concrete production

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Moving toward the future

MAPEI’s Re-Con line helps concrete producers to move toward a more circular and effective production model by offering cost-effective and sustainable concrete solutions. Under the four key concepts of Reclaim, Clean, Recycle and Reduce CO₂, substantial savings in waste-handling costs can be made by transforming returned concrete and truck-washing slurry into valuable material. The Re-Con line also offers products that enhance circularity of material flows by reducing the need for high-cost, virgin, raw materials... mitigating the problems of using recycled concrete, manufactured sand or clay-contaminated sand in new concrete.

Sustainable concrete production from linear to circular material flows

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Reclaim

Transforms returned concrete into reclaimed aggregates

This two-component system consists of a superabsorbent polymer and a hardener. It transforms fresh returned concrete into a granular material by chemically binding the free water (Part A) and by stabilizing and accelerating the process (Part B).

Reducing the environmental impact of concrete production

Transforming waste stream to resource material
Increasing material circularity

Reclaimed aggregates achieved without crushing

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Clean

Method to reduce truck-washing slurry

70% less cementitious waste in every truck washout
Re-Con dry washing utilizes the absorption capability of the Re-Con Zero Evo US aggregates to clean trucks of cementitious waste that is otherwise washed out. Using the Re-Con dry-washing process followed by a light wash with water will greatly reduce the truck-washout solids that lead to a high pH and increased pollution risk of heavy metals such as hexavalent chromium. With Re-Con dry washing, the root cause of truck-washout pollution is removed by transforming waste into recycled aggregates in a repeatable process.

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Recycle

Enables increased use of demanding aggregates and binders without cost increases or quality issues in concrete mix designs

The absorption-mitigating properties of the Re-Con AGG technology enable concrete producers to start using sand, aggregate or binders (all with high water demands) without having to increase the water or water-reducing admixtures in their mix designs. Examples of applications are:

Increased dosage of recycled concrete aggregates (RCA).
Increased dosage of sand with clay contamination.
Increased dosage of manufactured sand.
Introduction of CEM 1/L.

Re-Con AGG absorption-blocking technology partly makes mixing water and water-reducing admixtures available in the cement paste instead of being absorbed by the aggregates or binders. Finishability, water/cement ratio and cement consumption can be kept constant even at major changes to aggregate or binder properties.