Lower quality sands: Impact concrete performance and placement

Scarcity of good quality sands and the impact of transport on concrete embodied carbon, is providing significant challenges to the industry. However, the quality of sands has a direct impact on concrete performance, placeability and finishability.

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.

Chryso®Quad is a unique solution for extending the use of complex aggregates while maintaining superior concrete quality:

  • Harsh manufactured sands (specific shapes)
  • Sands with lower gradation (lack or excess of fines)
  • Swelling clay contaminated aggregates

Pumpability

improved concrete cohesiveness and rheology for enhanced pumpability without bleeding issues

Workability Retention

improved workability retention and facilitate concrete placement and finishability

Water Reducer

controlled water demand despite the presence of swelling clays

Reduced CO2 Footprint

reduced costs by sourcing from local suppliers, streamlining the procurement process and lowering the carbon footprint

Chryso®Quad solutions

Chryso®Quad is a unique solution that combines water reducing admixtures with a set of services to evaluate the quality of sands and adjust the concrete mix design, to achieve equal or better performance cost-effectively.

Full product offering based on proprietary polycarboxylate technologies that are highly efficient for mitigating clay-related water demand issues and lack of the concrete cohesiveness and flowability due to specific gradation/shape aggregates.

Characterize the type and quantity of clay embedded in your sands with Chryso®Clear Test.

Unique characterization method for swelling clay which is a real alternative to the methylene blue test with higher accuracy and reproductibility, and very easy-to-use testing in the lab and on site.

We support our customers with mix design proportioning considering your sand gradation, shape and other materials.

Products

CHRYSO®QUAD 602

CHRYSO® Quad 602 is a plasticiser – high range water reducer, specific to lack of fines and/or unfavourable sand shape factors. CHRYSO® Quad 602 includes some of our most recent polymer technologies. CHRYSO® Quad 602 uses GRAFT® (Gap Gradation Fixing Technology) a breakthrough technology, allowing for the use of coarse sand (low fines content).

CHRYSO®QUAD 606

CHRYSO® Quad 606 is a plasticiser – high range water reducer, specific to lack of fines and/or unfavourable sand shape factors. CHRYSO® Quad 606 includes some of our most recent polymer technologies. CHRYSO® Quad 606 uses GRAFT® (Gap Gradation Fixing Technology) a breakthrough technology, allowing for the use of coarse sand (low fines content).

CHRYSO®QUAD 687

CHRYSO® Quad 687 is a plasticiser – high range water reducer, specific to lack of fines and/or unfavourable sand shape factors. CHRYSO® Quad 687 includes some of our most recent polymer technologies. CHRYSO® Quad 687 uses GRAFT® (Gap Gradation Fixing Technology) a breakthrough technology, allowing for the use of coarse sand (low fines content).

CHRYSO®QUAD 743

CHRYSO® Quad 743 is a latest generation water reducing plasticiser, specific to an excess of fines and/or swelling clay. CHRYSO® Quad 743 includes some of our most recent polymer technologies. CHRYSO® Quad 743 uses CLEAR® (Clay Enabling Admixture Response) technology, allowing for efficient dispersion of hydraulic binders in concrete mix design using challenging sands containing swelling clays or high amounts of fine particles.

CHRYSO®QUAD 757

CHRYSO® Quad 757 is a latest generation water reducing plasticiser, specific to an excess of fines and/or swelling clay. CHRYSO® Quad 757 includes some of our most recent polymer technologies. CHRYSO® Quad 757 uses CLEAR® (Clay Enabling Admixture Response) technology, allowing for efficient dispersion of hydraulic binders in concrete mix design using challenging sands containing swelling clays or high amounts of fine particles.

CHRYSO®QUAD 487

CHRYSO® Quad 487 is a plasticiser – high range water reducer, specific to lack of fines and/or unfavourable sand shape factors. CHRYSO® Quad 487 includes some of our most recent polymer technologies. CHRYSO® Quad 487 uses GRAFT® (Gap Gradation Fixing Technology), a breakthrough technology, allowing for the use of coarse sand (low fines content).

CHRYSO®QUAD 527

CHRYSO® Quad 527 is a plasticiser – high range water reducer, specific to lack of fines and/or unfavourable sand shape factors. CHRYSO® Quad 527 includes some of our most recent polymer technologies. CHRYSO® Quad 527 uses GRAFT® (Gap Gradation Fixing Technology), a breakthrough technology, allowing for the use of coarse sand (low fines content).
concrete

CHRYSO®QUAD 537

CHRYSO®Quad 537 is classified as a water reducing plasticiser. The admixture thus induces the following major effects in a concrete mix: Without affecting the consistence (workability), permits a reduction in the water content of a given concrete or Without affecting the water content, increases the slump/flow or Produces both of the above effects simultaneously.

Enter the circular economy and its virtuous circle

The implementation of a circular economy approach with the use of local aggregates or aggregates from deconstruction sites is a major challenge to accelerate sustainable construction.

The Chryso®Quad range and dedicated services optimise production costs, while improving the quality and performance of concrete using complex aggregates.

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