This pour demonstrated that it is possible to move away from carbon-heavy, limestone-based Portland cement without compromising on performance or cost. Zeolite, the binder used in this mix, is a naturally occurring non-carbonate rock rich in silicon and aluminum, two of the most abundant elements in the Earth’s crust. It offers a compelling path toward large-scale decarbonization of the built environment.

C-Crete’s zeolite-based concrete achieved compressive strength exceeding 5,000 psi, and met/exceeded ASTM standards such as C1157, validating its mechanical and durability performance. The product flows and pumps like conventional concrete and matches its cost, while eliminating the CO₂ emissions typically associated with Portland cement. In addition, the material captures CO₂ from the air during curing, further enhancing its environmental profile.

Zeolite is just one example from C-Crete’s growing suite of cement-free concretes, each engineered to deliver high performance and low carbon impact using abundant, regional materials. This achievement marks another step forward in enabling net-zero construction without sacrificing structural reliability or economic feasibility.

C-Crete thanks all partners and contributors who helped make this milestone possible, including Building Transparency, Don Davies,  Allan Paull,  Larry Busch,  John Cherne, and Martin Josund.

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