Calix to Process 30,000 Tonnes of Calcined Clay Annually for Green360

• Two-year toll processing agreement for up to 30,000 tonnes of calcined clay annually
• Production at Calix’s Bacchus Marsh facility with no capital expenditure required
• Supports Green360’s Eco-clay, a low-carbon cement additive replacing traditional clinker
• Potential revenue of several million AUD per year starting FY26
• Agreement includes option to extend for an additional two years based on throughput

A Strategic Partnership for Low-Carbon Cement

Calix Limited (ASX:CXL), an Australian environmental technology company, has entered into a significant toll production agreement with Green360 Technologies (ASX:GT3) to produce calcined clay, a key ingredient in Green360’s low-carbon cement product, Eco-clay. This collaboration marks a notable step forward in the cement industry’s ongoing efforts to reduce carbon emissions.

The agreement allows Calix to process up to 30,000 tonnes of clay annually at its Bacchus Marsh Technology Centre in Victoria, using an existing operational calciner. Importantly, Calix will not incur any capital expenditure for this expansion, as Green360 will cover all costs related to necessary site upgrades. The initial contract term is two years, with an option to extend for another two years contingent on minimum throughput levels.

Eco-Clay: A Scalable Solution to Cement’s Carbon Challenge

Eco-clay is a high-reactivity metakaolin produced from calcined kaolin clay, designed to partially replace Portland cement clinker in concrete mixes. This substitution is critical because clinker production is the primary source of carbon dioxide emissions in cement manufacturing, due to the calcination of limestone at high temperatures.

Unlike traditional supplementary cementitious materials such as fly ash or slag, which are becoming scarcer, calcined clay offers a readily available and scalable alternative. The calcination process for kaolin occurs at lower temperatures and does not generate process carbon emissions, making it a promising pathway to lower the carbon intensity and energy costs of cement production.

Operational Synergies and Revenue Potential

By utilising existing production capacity at Bacchus Marsh, Calix anticipates operational synergies that complement its ongoing magnesia business. The toll processing agreement is expected to generate several million Australian dollars in revenue annually, with first payments projected in the 2026 financial year and continuing through to 2028.

While the contract outlines potential throughput volumes, actual production levels will depend on Green360’s commercial demand for Eco-clay. The successful completion of product trials, including delivery to a national concrete supplier, demonstrates the product’s readiness for market integration and compliance with existing supply chains.

Implications for Industry Decarbonisation

This partnership underscores the growing momentum behind decarbonisation technologies in the construction materials sector. By providing a scalable, lower-carbon supplementary cementitious material, Calix and Green360 are contributing to a broader industry shift towards sustainable cement production. This aligns with global efforts to reduce industrial emissions and meet net-zero targets.

Looking ahead, the collaboration may pave the way for further innovations and partnerships that leverage Calix’s patented technology platform across multiple industrial sectors, including cement, steel, and carbon dioxide removal.

Bottom Line?

Calix’s toll processing deal with Green360 positions it at the forefront of sustainable cement innovation, but market uptake of Eco-clay will be key to unlocking its full revenue potential.

Questions in the middle?

• How quickly will Green360 scale commercial demand for Eco-clay to meet throughput targets?
• What are the long-term prospects for extending the toll processing agreement beyond four years?
• Could Calix’s technology be adapted to produce other supplementary cementitious materials?