WPSA · Warialda, New South Wales
Natural pozzolan for the decarbonisation of concrete.
WPSA from Warialda, New South Wales — a silica-alumina pozzolan for low-carbon concrete, from a 208 million tonne inferred resource.
208.09 Mt
Inferred Resource (JORC 2012)
A$3.31 bn
Project NPV (SLR, 15% discount rate)
97-year
Exclusive extraction & off-take rights
Up to 40%
Cement replacement
Source: SLR Consulting Australia Pty Ltd, November 2025. Inferred Resources are not Ore Reserves.
The challenge
Concrete is the world's most used material — and cement its largest carbon cost.
~30 bn t
of concrete produced every year
≈ 8%
of global CO₂ emissions come from cement
EU ETS · CBAM
Carbon pricing is tightening, with the UK and others following
The solution
WPSA: a natural supplementary cementitious material
Reduced Carbon Footprint
Replacing part of the Portland cement in a mix with WPSA avoids the emissions of clinker production, tonne for tonne.
Enhanced Durability
Pozzolanic reaction forms additional C-S-H binder for denser, less permeable concrete with improved resistance to chemical attack.
Green Building Innovation
A naturally occurring material requiring minimal processing — supporting low-carbon specifications and green building standards.
Proven for 2,000 years
Roman chemistry, modern concrete.
Roman concrete owes its longevity to natural pozzolans — reactive silica and alumina that bind with lime to form durable cementitious compounds. WPSA brings the same chemistry to modern construction.
Chemistry at a glance
85.8%
SiO₂ + Al₂O₃ + Fe₂O₃ average in the pozzolanic sandstone zone
SiO₂
65.0%
Al₂O₃
16.1%
Fe₂O₃
4.7%
Impact calculator
Estimate the carbon you could avoid
Emission factor 0.8 t CO₂/t · carbon price €70/t.
- WPSA required
- 30,000 t
- CO₂ avoided
- 24,000 t
- Carbon cost avoided
- €1,680,000
- Equivalent cars off the road
- 5,217
Indicative estimate only. Actual savings depend on mix design, local standards and transport.
Target markets
Supplying low-carbon construction where carbon pricing bites
United Kingdom
UK ETS and the forthcoming UK CBAM are reshaping cement procurement.
Europe
EU ETS and the phase-in of CBAM put a rising price on clinker emissions.
North America
Growing low-carbon concrete procurement and emerging carbon schemes.
Partner with UPSA
Cement producers, concrete producers, developers and public-sector teams: discuss samples, technical data and supply.