Independent Expert Review Confirms AusPozz™ Performance Strength - A Low-Carbon Concrete Story.
- Noel Ong
- 12 minutes ago
- 7 min read
Announcement
Independent Expert Peer Review Validates AusPozz Performance 25 November 2025 (click here to view the announcement)
Zeotech Limited (ASX: ZEO) has released the findings of an independent expert peer review examining the performance of its high-reactivity supplementary cementitious material, AusPozz™ (Figure 1), across a comprehensive program of concrete mix trials conducted over 12 months. The review was undertaken by BG&E Pty Ltd, an engineering consultancy with a long-standing reputation across Australia’s infrastructure and structural engineering sectors.
Figure 1: AusPozz™ - High Reactivity Metakaolin (source: ZEO)
The Business of the Company: Focus – Low-Carbon Concrete
Zeotech is advancing a portfolio of low-carbon concrete materials and advanced environmental applications (Figure 2) derived from its high-grade kaolin resources. The AusPozz™ program is a central pillar of the company’s broader strategy to:
Develop high-reactivity metakaolin for sustainable concrete markets.
Provide solutions for GHG mitigation, including zeolite-based technologies.
Position AusPozz™ as a compliant and technically validated SCM aligned with Australian standards.
Figure 2: AusPozz™ - Significantly lower carbon footprint and multiple performance benefits (source: ZEO)
Highlights – Independent Review Validates High-Performance Concrete Outcomes
The BG&E peer review confirms AusPozz™ as a high-performance SCM based on the following outcomes:
Superior Strength Performance: Across all mix designs assessed over 12 months, AusPozz™ consistently delivered higher strength results. In some trials, strength increases exceeded 130% compared with control mixes.
Reduced Drying Shrinkage: An average 30% shrinkage reduction after 56 days was recorded, supporting improved dimensional stability and reduced cracking risk.
ASR Mitigation: At 25% cement replacement, all materials transitioned from reactive to non-reactive status, meaning AusPozz™ can effectively mitigate Alkali–Silica Reaction.
Workability Maintained: Plastic properties (bleed, air content, consistency) behaved similarly to mixes incorporating other SCMs, reinforcing suitability for commercial-scale batching.
Thermal Advantages: AusPozz™ reduced peak temperatures compared with cement, reducing thermal cracking risks and supporting lower-cost concrete designs.
Silica Fume Replacement: In high-strength concretes, AusPozz™ delivered performance comparable to silica fume, providing additional cost and handling advantages.
Leadership Commentary
Zeotech Chief Executive Officer, James Marsh, commented:
“Independent expert validation confirms AusPozz™ as a high-performance building material with the capability to materially decarbonise concrete across both infrastructure and commercial applications and deliver technical advantages. The demonstrated benefits in strength, shrinkage control, ASR mitigation, and the potential for cost savings position AusPozz™ as a highly compelling solution for the built environment.
Importantly, BG&E’s independent review provides industry stakeholders with confidence that AusPozz™ meets rigorous technical standards and can consistently deliver both sustainability and performance outcomes. This milestone reinforces Zeotech’s commitment to advancing innovative, low-carbon materials that support the transition to sustainable construction while delivering tangible economic and operational value for our partners."
About the Project – Independent Peer Review by BG&E
Zeotech engaged BG&E to conduct a full technical peer review across a broad suite of concrete mix trials, including:
Precast
Bulk-fill
Abrasion-resistant mixes
High-performance concrete
The methodology included standardised benchmarking against control mixes to evaluate the effect of AusPozz™ as a cement replacement SCM.
The review was led by:
Greg van Rooyen, Senior Associate & Team Leader – Materials (QLD), Chartered Professional Engineer and current National Vice-President of the Concrete Institute of Australia.
BG&E is recognised for:
National and international engineering leadership
Material durability expertise
Compliance with Australian standards (AS 3852.4:2022)
Near-term Milestones to Watch
According to the announcement, Zeotech is progressing multiple next-step activities:
Expansion of the durability assessment program to support broader market adoption.
Additional testing of high-performance concrete mixes to strengthen technical validation.
Ongoing work with Queensland Transport and Main Roads to secure AusPozz™ inclusion in approved product lists.
Continued advancement of commercial engagement across infrastructure and construction markets.
How Samso Understands the Investment Memo for the Company
From a Samso perspective, the independent peer review provides the kind of third-party technical validation that is essential in materials science commercialisation. AusPozz™ now sits in a stronger position with respect to compliance, technical performance, and market readiness.
The investment lens highlights several key points:
Validation reduces technical risk. Independent confirmation supports the credibility of AusPozz™ across multiple performance categories.
Market adoption depends on evidence. Concrete producers and infrastructure clients typically require multi-year, consistent data before integrating new SCMs. This process is underway and strengthened by these findings.
Regulatory alignment supports scalability. The confirmation of alignment with AS 3852.4:2022 is a critical enabler for future tenders and approvals.
Expansion of testing is value-accretive. While in the early stages, the broadened testing program directly addresses industry requirements and de-risks future commercial rollouts.
This is still an early part of the commercialisation curve, but the foundations continue to strengthen.
Samso Concluding Comments
The release of an independent peer review is always an important milestone for any emerging technology, and in this case, it provides Zeotech with a substantial layer of technical credibility. The concrete industry is built on standards, performance benchmarks, and evidence that can withstand scrutiny. BG&E’s review does exactly that — it delivers a detailed assessment of AusPozz™ across a range of real-world mix designs, confirming repeatable results rather than isolated laboratory outcomes.
Strength improvements exceeding 130%, shrinkage reductions of 30%, and the ability to transition ASR-affected materials to non-reactive classification all point to a product that is genuinely additive to the performance of concrete. These are measurable improvements that matter to structural designers, precast manufacturers, and civil engineering teams managing long-term durability risks.
The study also shows that AusPozz™ behaves predictably alongside existing SCMs. This is a key factor for commercial adoption, as concrete producers demand reliable workability, batching behaviour, and alignment with established mix protocols. The confirmation that AusPozz™ maintains plastic properties comparable to current SCMs lowers the practical risk for early adopters and sends a strong message that the material can slot into existing operational workflows without disruption.
While this validation strengthens the foundation, it is equally clear that Zeotech still has a pathway of continued testing, approvals, and broader engagement ahead. The industry will expect long-term durability datasets and large-scale field applications, and Zeotech has acknowledged this by expanding its testing program. Nonetheless, this peer review marks a significant step forward — a moment where the narrative shifts from potential to demonstrated performance, giving the market a clearer sense of what AusPozz™ can deliver.
The Market Perspective
Figure 3: The share price chart for Zeotech as of 15th December 2025 (source: CommSec)
The market acceptance is a clear indication that the company's story is heading in the right direction (Figure 3). ZEO currently has a market valuation around the AUD $160M mark, and for me, that is not a bad level for taking a position. There is now a clear indication that the product does work, and one has to remember that Alpha HPA Limited took a long time to get to a market capitalisation of AUD $800M (see link below for our Samso News on the company).
The HPA journey, or in this case, for Zeotech, the low-carbon concrete journey, is taking small but positive steps. One has to remember that this has been jouney measured in multiple years.
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