CIRCA.
LOADING THE FILM
CIRCA.
CIRCA—Low-carbon concrete
The concrete that lives twice.
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CH.01 — HELD

This is where every building ends.

Concrete is the most used material on Earth after water. For a century, its story stopped here — at the moment of collapse.

CH.02 — REWIND

Unless you run it backwards.

CIRCA starts where demolition ends: rubble lifted back out of the waste stream, on its way to becoming material again.

CH.03 — THE TURN

What was a building becomes a building again.

CH.04 — THE NEW MIX

Same concrete. Less carbon.

−0%CO₂ · NO OFFSETS

At least 30% lower CO₂ than standard concrete — measured against CEM I, achieved in the mix itself, not bought as offsets.

CH.05 — BORN AGAIN

Build better with less.

CIRCA is low-carbon concrete that pours, pumps and performs exactly like the concrete you know.

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THE RANGE

One concrete. A whole ladder of less.

CIRCA is sold at a range of verified low-carbon levels, so every project can pick its reduction — from a strong first step to near-zero ambition. Performance stays equal or better than conventional concrete; the carbon simply leaves the mix.

−30%

The floor, not the ceiling

Every CIRCA mix starts at a minimum 30% CO₂ reduction versus standard (CEM I) concrete — achieved in the mix, without offsets.

−50%

The working band

Optimised binders, supplementary cementitious materials and admixture technology carry everyday structural mixes deep past the baseline.

−70%+

The leading edge

Top mixes exceed 70% reduction, extending toward the deepest cuts available for each project.

100%

Performance kept

Locally produced and fully recyclable — equal or superior properties to the concrete you already specify.

PROVEN IN THE GROUND

Already carrying cities.

01

The Metro

A capital city, Latin America

Metro-scale proof: more than 100,000 m³ of low-carbon concrete across 13 stations, cutting construction emissions by at least 30% before the first train carries a passenger.

02

The Institute

Southern Australia

A high-performance sports campus with low-carbon mixes through the entire structure — roughly 20% less carbon per cubic metre, with no loss of workability or finish.

03

The Library

Western Europe

A century-old library renewed with recycled demolition aggregates — more than half its concrete given a second life, supplied from a dedicated recycling plant nearby. A building's second life, built from other buildings' first ones.

THE CIRCLE

Waste is just material waiting for its second life.

CIRCA cuts carbon where it lives — in the binder. Supplementary cementitious materials and admixture technology replace a large share of carbon-intensive clinker, and where local norms permit, closed-loop recycling returns construction and demolition materials to the mix, closing the loop on building waste. Every cubic metre is designed to be recycled again — and it handles, pumps and finishes exactly like the concrete your crews already know.

≥30%
lower CO₂ than standard CEM I concrete, without offsets
70%+
reduction in top mixes across the range
0
offsets — every reduction achieved in the mix itself
1:1
placement — no workflow changes for site crews

Your next building's second life starts now.

Specify CIRCA on your next pour — or talk to us about the reduction level your project can reach.

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