Green360 Technologies Limited (ASX:GT3) has strengthened its position in sustainable construction with a suite of technical and commercial milestones across low-carbon cement development and kaolin operations during the June 2025 quarter. The company reported strong progress on its proprietary red mud-kaolin cement blend, signed a joint venture memorandum of understanding (MoU) with PERMAcast, and advanced high-quality metakaolin production and testing.
At its 100%-owned Pittong operation, FY25 revenue rose 8.1% year-on-year to A$13.3 million, underpinned by increased kaolin sales and improved operating margins. Pittong also secured a new clean energy customer in Japan, while a bulk calcining run post-quarter-end marked a step towards commercial-scale metakaolin production.
Strategic collaboration for low-carbon concrete
Green360 signed a non-binding MoU with Western Australian precast manufacturer PERMAcast to develop and commercialise low-carbon retaining wall blocks. Under the agreement, PERMAcast will fund and install key equipment, with both parties holding exclusive rights to acquire blocks at cost through a 50/50 joint venture.
This initiative targets a growing market need for sustainable construction materials in Western Australia, driven by public and private sector infrastructure demand. The block laying equipment is expected to be commissioned in the first half of calendar year 2026, with initial revenues anticipated from the joint venture’s product rollout.
Metakaolin product development gains traction
During the quarter, Green360 successfully produced high-reactivity metakaolin from its kaolin feedstock, meeting stringent global quality benchmarks. Lab testing in collaboration with Murdoch University showed amorphous content exceeding 88%, placing the product at the high-performance end of global SCM (supplementary cementitious material) standards.
The company has begun concrete performance trials with PERMAcast, aiming to validate its application in large-scale structural concrete. Metakaolin is seen as a key low-carbon input with the potential to partially replace Portland cement while improving concrete performance and lowering emissions.
Red mud valorisation breakthrough
Green360 achieved a significant technical milestone by developing a proprietary transformation process combining red mud — a bauxite residue — with kaolin to create low-carbon cement. The red mud-kaolin blend achieved 30 Megapascal (MPa) compressive strength after 28 days, exceeding 85% of traditional Portland cement benchmarks in laboratory trials.
In addition to its performance, the treated blend showed a marked reduction in hazardous leachability, with chromium levels well below regulatory thresholds and no detectable uranium or thorium. This opens potential for large-scale red mud reuse aligned with circular economy and net-zero goals.
Pittong kaolin revenue and margin uplift
Revenue from the Pittong kaolin operation climbed to A$13.3 million in FY25, with 22,074 tonnes sold, up from 19,842 tonnes in FY24. This growth reflects expanded market penetration and successful customer engagement. EBITDA swung from a A$1.1 million loss in FY24 to a A$0.2 million profit, driven by cost discipline and operational efficiencies.
A key development post-quarter was a 457.7-tonne bulk calcining run to produce metakaolin, with feedstock partly sourced from tailings, reinforcing the company’s sustainability focus while reducing input costs.
Entry into Japan’s clean energy market
Green360 also secured a supply contract with a new Japanese customer, with Pittong kaolin chosen for its suitability in waste-to-energy incineration. Initial orders have grown from 150 to 288 tonnes per annum across two incinerators, with full-scale trials underway at three larger units. If successful, annual sales could reach 2,000 tonnes, opening a promising new revenue stream aligned with global decarbonisation trends.
Financial and operational summary
Green360 spent A$3.1 million on hydrous kaolin mining and processing and A$0.13 million on development activities during the quarter. No exploration was conducted.
Cash at quarter-end stood at A$1.82 million, with six quarters of funding coverage based on current outgoings.