Green360 Hits Major Milestone with Verified Eco-Clay Cement Substitute

Green360 Technologies (ASX: GT3) has achieved a significant commercial and environmental milestone, announcing that its Eco-Clay product has passed independent testing to meet Australian and international standards as a certified supplementary cementitious material.

Eco-Clay is a calcined kaolin-based product, created from by-products of Green360’s kaolin mining operations. The company transforms tailings and settlement pond residues into metakaolin through thermal activation at around 750 degrees Celsius, producing a low carbon, high performance substitute for Portland cement.

Testing conducted by the University of Melbourne confirms that Eco-Clay complies with AS 3582.4:2022 and ASTM C618 standards for Grade 1 pozzolans. Results show Eco-Clay delivers high reactivity, excellent strength development, and calcination efficiency of 96 percent. Mortar trials demonstrated compressive strength that meets or exceeds international benchmarks.

Executive Chairman Aaron Banks said the achievement represents a breakthrough for circular economy innovation. “Eco-Clay meets the highest standards, performs as well as or better than international metakaolins, and can potentially be produced at a fraction of the cost because it is derived from our own by-product streams, right here in Australia,” he said.

Unlike traditional cement production, which accounts for approximately 8 percent of global carbon dioxide emissions, Eco-Clay offers an environmentally responsible pathway to reducing the embodied carbon in construction. It can replace up to 40 percent of Portland cement in concrete formulations, making it a scalable solution for decarbonising infrastructure and building materials.

Green360 is now supplying Eco-Clay to key stakeholders in the premix concrete industry for market-based trials. The company is also in advanced negotiations to toll treat the product at a third-party facility, enabling near-term commercial supply.

Australia’s cement market exceeds 10 million tonnes annually, with demand for sustainable alternatives growing in response to ESG mandates, green building standards and corporate net-zero targets. Traditional SCMs such as fly ash and slag are becoming increasingly scarce, giving Eco-Clay a timely competitive advantage.

Eco-Clay’s production model provides strong cost efficiency, as it utilises material that has already been mined and processed. This significantly reduces both waste and production costs, allowing Green360 to offer a premium-grade product with a lower carbon footprint and attractive margins.

The company’s next steps include securing commercial production capacity, conducting broader market trials, and engaging with government and industry to support the adoption of low carbon construction materials across Australia.

With verified performance, a circular production model, and a clear path to market, Eco-Clay is shaping up as a major innovation in sustainable infrastructure.