Sublime’s electrolyzer is a variation of a water-splitting electrolyzer. One electrode produces a solution that extracts calcium from inert minerals, leaving behind a reactive silicate. The second electrode produces alkalinity, which precipitates calcium (also known as lime) as a pure, reactive solid. Reactive calcium and silicates are blended in a low-temperature process to make the final product — Sublime CementTM.
This ASTM C1157-compliant cement will be the first to commercial scale that approaches ‘true’ zero carbon — rather than just ‘net’ zero — by avoiding CO₂ emissions in the first place and foregoing the need for carbon capture and storage.
Sublime Systems produces high-performance, low-carbon cement that has similar (or better!) ultimate strength, durability, slump, and set time as the cement we use today for our buildings and infrastructure.
Sublime is rapidly scaling our high-performance, low-carbon cement production as a true-zero process that doesn’t emit carbon.
The needs of the construction ecosystem are at the center of our work. Sublime CementTM is a drop-in replacement for today’s portland cement, creating a frictionless replacement for ready-mix concrete producers that meets or exceeds ASTM C1157 standards.
Sublime Systems is actively driving down the cost curve with a commitment to produce cost-competitive cement at scale without relying on carbon credits at our end plants.
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Sublime Cement™ requires neither heat (therefore no fossil fuels) nor carbonate feedstock. Our technology innovations will allow us to finally make a true-zero-carbon cement — the way we believe cement will be made for millennia to come!
>90% CO₂ Reduction Possible
Fossil Fuel Use
Cost
Embodied Energy
Meets Ready-Mix Specs
Sublime Cement™
Cement today (OPC)
OPC + Carbon Capture
Supplementary Cementitious Materials
Carbonated / CO₂-Cured
Sublime CementTM
>90% CO₂ Reduction Possible
Cost
Meets Ready-Mix Specs
Fossil Fuel Use
Embodied Energy
Cement today (OPC)
>90% CO₂ Reduction Possible
Cost
Meets Ready-Mix Specs
Fossil Fuel Use
Embodied Energy
OPC + Carbon Capture
>90% CO₂ Reduction Possible
Cost
Meets Ready-Mix Specs
Fossil Fuel Use
Embodied Energy
Supplementary Cementitious Materials
>90% CO₂ Reduction Possible
Cost
Meets Ready-Mix Specs
Fossil Fuel Use
Embodied Energy
Carbonated / CO₂-Cured
>90% CO₂ Reduction Possible
Cost
Meets Ready-Mix Specs
Fossil Fuel Use
Embodied Energy
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