Gap Gradation & Clay Contamination

The supply of sand and aggregates is becoming a major challenge in the face of dwindling resources and new types of available aggregates.

Every year, 15 to 20 billion tonnes of sand are used by the construction industry*. While this figure is impressive, it becomes even more so when we compare it to the sands that can be exploited by this industry.

Indeed, the majority of the so-called “complex” aggregates (deserts, local quarries, seabeds, etc.) available on our planet are [in retrospect] not exploitable for the manufacture of concrete, leading to various problems – high presence of clays, excess of fines, too slick, poor bonding with cements – thus restricting the quantity available of this precious resource.

CHRYSO has developed a solution to allow the possibility of using lower quality sands, which are locally sourced, without compromising the concrete quality, significantly contributes to reducing supply lead time, costs and improving the concrete CO₂ footprint.