Upcoming Notification for Sublime Users - Click Here
Upcoming Notification for Sublime Users - Click Here
Today’s portland cement is made by cooking limestone, sand, and clay in massive kilns running at 1450°C. Nearly half of the limestone is wasted as it decomposes in the kiln to form reactive lime.
We instead use the elegance of electrochemistry to extract reactive calcium (Sublime Lime®) and silicates from abundant raw materials that are then blended into a final Sublime Cement. Our cement’s crystal structure is different than the OPC produced in a fiery kiln, but its performance and hardened phase in concrete are the same.
Our process cleans up cement production by avoiding CO₂ emissions in the first place. We skip the carbon addition and subtraction typical of net-zero solutions — and the associated expense and complexity of carbon capture, sequestration, credits, and clean up.
Our process transforms electrical energy into chemical energy to break feedstocks down into their constituent elements. We then reassemble these pure, reactive ingredients into the ideal cement composition. We use every part of the rock, leading to near-zero waste, unlike the limestone mined for OPC, 50% of which is wasted.
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
We replace the singular feedstock limestone with abundant calcium silicate minerals or industrial wastes.
We use electricity, not heat, to break down feedstocks into their constituent minerals.
This intrinsically purifying process extracts all the individual minerals from the rock, including aluminum, magnesium, and iron—providing a cleaner, cheaper source of these materials that are critical for many industrial applications today.
Calcium and silicates are produced from this process as the essential, reactive ingredients for cement.
The final result is an ASTM C1157 Sublime Cement to displace OPC.
This intrinsically purifying process extracts all the individual minerals from the rock, including aluminum, magnesium, and iron—providing a cleaner, cheaper source of these materials that are critical for many industrial applications today.
Sublime was invented because proliferating electricity sources meant that legacy processes of the Industrial Revolution could be reimagined. While many new technologies are working to access this clean grid electricity, Sublime’s manufacturing has the highest impact. Each kWh displaces limestone emissions (the majority emissions from traditional cement-making) and the energy emissions from fiery kilns.
The mass of man-made things now exceeds the dry mass of living things on Earth — and half of that mass is concrete. We can turn cement into a circular solution. Our Sublime® electrochemical process can be adapted to produce Sublime Lime®, silicates, and cementitious ingredients from a range of both naturally occurring minerals and many industrial wastes that are currently landfilled. This spans slag byproducts from steelmaking, kiln ashes and dusts, and even returned and demolished concrete.
Corporate
Sublime Systems
28 Park Street
Somerville, MA 02143
Contact
info@sublime-systems.com
+1 617 831 4328
LinkedIn
This website was designed and built sustainably 🌱.
© 2025 Sublime Systems. All rights reserved.