Quad^®– Circular economy & Sustainable construction

To support a client in the south of France in optimizing the sand resources used in its concrete formulation, Chryso proposed its Quad^®870 solution, which improved productivity, concrete quality, and allowed for sourcing exclusively from local suppliers.

This industry player supplied his plant with sand from two quarries. A complex crushed sand, sourced from a quarry near the plant. A second “corrective” sand, from another quarry located 60km from the plant. Up to 50% of each sand was used in the different concrete mixes, which ranged from class S3 to S5.

In its specifications, the industry player requested that Chryso provides a solution to increase its capacity to use complex sands (with a high content of fines and the presence of clays). Thanks to the Quad^® Lab service, sands were recovered and analyzed in the laboratory and in the plants. This allowed Chryso to design the customized Quad^®870 product. The first product testing phases were validated on site by sand variability checks carried out by the client using the Chryso®CLEAR Test kit.

As a result, the customer has extended the use of Quad^®870 to three other concrete plants and now uses 100% complex sand from a local quarry. The use of a single sand, with a constant dosage, brings a benefit of regularity in the production, reducing the weight of CEM II A cement in the design mix, which represents a 10% reduction of the carbon footprint. In addition, thanks to the exclusive use of short-distance sourcing, 24 lorry journeys per month have been avoided.