50 billion tonnes are mined globally every year from rivers, dunes and ocean dredging for use in construction.
Washing sand for use in construction requires massive volumes of water which is expensive to clean up and creates a lot of waste.
Concrete is the world’s most widely used building material. It is strong, versatile, low cost, fire resistance, water resistance and creates structures that last a long time. However, concrete production accounts for at least 8% of the world's carbon emissions.
For construction to be
more sustainable, concrete
must be more sustainable.
For construction to be more sustainable,
concrete must be more sustainable.
To secure a more environmentally friendly and sustainable construction industry: we need to find alternatives to natural sand in concrete. We need to wash without water, recycle waste and by-products, and use less cement to achieve the same concrete strength.
The secret is in the sand. Kayasand.
Our goal is to create the perfect concrete sand. The cuboidal shape, precise grading and consistency of our sand is of such quality when compared with natural sand, it requires up to 20% less cement to create concrete of the same strength.
Waste glass is recycled into premium concrete sand, concrete is recycled back into concrete, and cement substitutes are created from limestone filler and waste slag.
Stronger concrete with less cement and reduced mining of virgin aggregate.
Transforms by-products and waste into premium building products.
Uses no water for washing aggregate & gives off no dust.
Replaces the need for natural sand in concrete.
Increases throughput and utilisation while reducing costs.
High quality manufactured sands are proven to produce concrete of the highest quality, with higher strengths, durability, and consistency, enabling significant reductions in cementitious contents, costs, and carbon emissions. Kayasand technology and plants have been proven to produce the highest quality manufactured sand with full control over particle shape, particle size distribution and consistency.
Mark Mackenzie, Managing Director of Technicrete Pty Ltd
The V7-60 technology is cutting edge as far as improving shaping in a sand product. The Kayasand plant has been instrumental in us [Holcim] getting a significant portion of our manufactured sand into the Sydney market.
Darren Essex, Holcim Albion Park Quarry Manager, Quarry Magazine July 2022
Savings in excess of 10% in the cement content have been commonplace in recent tests. There is sufficient experimental evidence to justify the use of Kayasand as a 100% replacement for natural sand in concrete.
D Gardner, R Lark and M Pilegis, Cardiff University
This sand is not like regular sand - it’s helping save the planet
Kayasand gears up to meet demand for engineered sand in concrete
Kayasand paves the way to a secure supply of concrete sand with New Zealand’s first sand engineering plant